Consulta: subjectFacets:"Salinity"
Registros recuperados: 374
Data/hora: 05/06/2024 01:00:20

Crecimiento y distribución iónica en nueve accesiones de aguacate regadas con agua salina.
Provedor de dados: 32
Autores: Rojas Rojas, Rafael.
El presente estudio se realizó para conocer la respuesta en crecimiento y distribución iónica de nueve accesiones de aguacate, al estrés provocado por el riego con agua salina. Plantas originadas de semilla de las accesiones: Tochimilco S2, Criollo 38, Tepetl, Aquila S1,  257 PTB todas ellas de la raza Mexicana (var. drymifolia), Navideño y un Segregante de Hunucma de la raza Antillana (var. americana), Fuerte negro (Guatemalteco x Mexicano) y Persea nubigena 1/7 (Persea nubigena Will.), fueron trasplantadas, cuando tenían un año de edad, a una cama de siembra con suelo de textura franco arenoso y fueron manejadas bajo condiciones de invernadero en Chapingo, Estado de México. El diseño experimental fue completamente al azar con 9 tratamientos (accesiones)...
Palavras-chave: Persea americana Mill.; Riego; Toxicidad; Salinidad; Recursos fitogenéticos; Irrigation; Toxicity; Salinity; Fitogenetic resources; Edafología; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/556

Composición química de las aguas del cause Tula-Moctezuma-Claro, estado de Hidalgo
Provedor de dados: 32
Autores: Ríos Trujillo, Rosa María.
Las aguas superficiales que circulan en el cauce fluvial Tula–Moctezuma-Claro  riegan zonas  agrícolas de Tepéji del Río, Valle del Mezquital, Hidalgo y  Tamazunchale, S. L. P. Se recolectaron muestras de agua en estaciones de  muestreo; 35 en primavera 2006 y 47 en otoño 2007. Con los valores analíticos  químicamente determinados se establecieron las siguientes relaciones  funcionales: miligramos por litro-conductividad eléctrica mg L ̄ ¹ = f (CE);  presión  osmótica-conductividad eléctrica MPa = f (CE). Se evaluaron los valores de la  Relación de Adsorción de Sodio en sus diferentes formulaciones: Relación de  Adsorción de Sodio explicita RAS, Relación de Adsorción de Sodio Ajustada  RASaj y Relación de Adsorción de Sodio corregida RAS°. Con las...
Tipo: Tesis
Palavras-chave: Salinidad; Sodicidad RAS; Carbonato de Sodio Residual (CSR); Maestría; Hidrociencias; Salinity; Sodicity; RAS; Carbonate of Residual Sodium (CSR).
Ano: 2009
URL: http://hdl.handle.net/10521/1512

Diversidad del jitomate nativo de Puebla y Veracruz : valoración morfo-agronómica y germinación en medio salino.
Provedor de dados: 32
Autores: Estrada Trejo, Victoria.
México ha avanzado poco en el estudio, conservación, aprovechamiento sistemático y mejoramiento genético del jitomate nativo mexicano. También hace falta conocer las respuestas de este germoplasma a condiciones de algún tipo de estrés ya sea biótico o abiótico. Con tal fin en la primera parte de este estudio, el objetivo fue conocer la diversidad agronómica y morfológica del jitomate nativo mexicano, con miras a su incorporación en programas de mejoramiento genético. Se caracterizaron morfológica y agronómicamente 34 poblaciones nativas de jitomate, provenientes de los estados de Puebla y Veracruz, México. Los resultados de los estimadores de componentes de varianza indicaron que de las 43 variables, únicamente 16 mostraron repetibilidad, y 27...
Palavras-chave: Solanum lycopersicum L.; Salinidad; Cloruro de sodio; Diversidad genética; Recursos genéticos de jitomate; Salinity; Sodium chloride; Genetic diversity; Tomato genetic resources; Producción de semillas; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2127

Caracterización de las aguas y suelos de la red hidrográfica Zumpango-Ixmiquilpan-Zimapán, estado de Hidalgo, México.
Provedor de dados: 32
Autores: Castro Luna, Israel.
En el Valle del Mezquital, Estado de Hidalgo, México, se riega con aguas de origen urbano-industrial provenientes de la ciudad de México. Estas aguas se utilizan prácticamente sin ningún tratamiento, esto conlleva a la acumulación de las sales solubles y a la sodificación paulatina de los suelos. El objetivo de este trabajo de investigación de carácter descriptivo, permitió conocer como varían las composiciones iónicas y las concentraciones electrolíticas de las aguas residuales y estimar los niveles de sodio intercambiable, además de conocer valores máximos y mínimos, con base en la Relación de Adsorción de Sodio bajo diferentes formulaciones RASor, RASaj y RAS°corr. Se determinaron los siguientes parámetros: 1. Composición iónica de las muestras de agua...
Palavras-chave: Salinidad; Sodicidad; RAS; PSI; CSR; Presión osmótica; Salinity; Sodicity; SAR; ESP; RSC; Osmotic pressure; Doctorado; Hidrociencias.
Ano: 2011
URL: http://hdl.handle.net/10521/398

Respuestas agronómicas y fisiológicas de pepino a diferentes concentraciones de cloruro de sodio
Provedor de dados: 32
Autores: García Morales, Soledad.
La salinidad del suelo es una de las principales limitantes en la producción de  alimentos debido a que afecta negativamente muchos aspectos del metabolismo y  rendimiento de las plantas cultivadas. La respuesta de las plantas a la salinidad  consiste en numerosos procesos que funcionan coordinadamente para aliviar tanto el  estrés osmótico como la toxicidad y el desbalance nutrimental.   La presente investigación fue conducida bajo condiciones de invernadero durante el  período Otoño del 2006 en el Colegio de Postgraduados, Campus Montecillo. Se  evaluó el efecto de cinco concentraciones de cloruro de sodio (0, 47, 97, 150 y 205  mM de NaCl) suministradas en la solución nutritiva Steiner al 100 % empleada para  el riego, para analizar sus efectos en...
Tipo: Tesis
Palavras-chave: Salinidad; Crecimiento; Rendimiento; Calidad de frutos; Fisiología de plantas; Nutrición de plantas; Maestría; Edafología; Salinity; Growth; Yield; Fruit quality; Plant physiology; Plant nutrition.
Ano: 2007
URL: http://hdl.handle.net/10521/1315

Variaciones iónicas en las aguas residuales del Valle del Mezquital.
Provedor de dados: 32
Autores: Cuéllar Carrasco, Edwin.
En México, se riegan con aguas residuales aproximadamente 200,000 ha en diferentes valles intermontanos en la zona del Mezquital. Las aguas residuales utilizadas en el Valle del Mezquital no han recibido ningún tratamiento. Debido al tamaño del área de cultivo de 80,000 ha con antigüedad de 97 años en operación continua, la región es un ejemplo de uso de aguas residuales para riego, que derivan de la zona metropolitana del Valle de México. El Valle del Mezquital se localiza dentro del límite suroeste del estado de Hidalgo (latitud norte 20° 02 ́ y longitud oeste 99° 15 ́). Está situado en lo alto de la meseta mexicana, a 60 km de la ciudad de México con una altitud entre 1,640 m y 2,400 msnm. Está conformado por 27 municipios de los 84 que conforman el...
Palavras-chave: Aguas residuales; Salinidad; Sodicidad; Conductividad eléctrica; RAS; Wastewater; Salinity; Sodicity; Electrical conductivity; Sodium adsorbed; Relationship; Hidrociencias; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2180

Calidad de las aguas del sistema hidrográfico Zahuapan-Atoyac
Provedor de dados: 32
Autores: Carrera Villacrés, David Vinicio.
El sistema hidrográfico Zahuapan-Atoyac, Estado de Tlaxcala está formado por la confluencia de  los ríos Zahuapan y Atoyac cerca del poblado de Panzacola, Tlaxcala. En las estribaciones de la  sierra de Tlaxco, se tienen escurrimientos que derivan a la laguna de Jalnené. El Río Zahuapan  nace en la laguna de Jalnené. El río Atoyac se origina en las  estribaciones de la sierra de  Calpulalpan, Tlaxcala. Los ríos Zahuapan y Atoyac reciben en su cauce aguas urbano-industriales  de las zonas económicas del valle de Tlaxcala y Zacatelco; además de numerosas poblaciones  aguas arriba. El río Atoyac atraviesa la ciudad de Puebla siguiendo su cauce hasta la presa Manuel  Ávila  Camacho. Gran parte del territorio del sistema hidrográfico Zahuapan-Atoyac pertenece...
Tipo: Tesis
Palavras-chave: Salinidad; Sodicidad; PSI; RAS; Maestría; Hidrociencias; Salinity; Sodicity; ESP; SAR.
Ano: 2007
URL: http://hdl.handle.net/10521/1251

Crecimiento y distribución iónica en nueve accesiones de aguacate regadas con agua salina.
Provedor de dados: 32
Autores: Rojas Rojas, Rafael.
El presente estudio se realizó para conocer la respuesta en crecimiento y distribución iónica de nueve accesiones de aguacate, al estrés provocado por el riego con agua salina. Plantas originadas de semilla de las accesiones: Tochimilco S2, Criollo 38, Tepetl, Aquila S1,  257 PTB todas ellas de la raza Mexicana (var. drymifolia), Navideño y un Segregante de Hunucma de la raza Antillana (var. americana), Fuerte negro (Guatemalteco x Mexicano) y Persea nubigena 1/7 (Persea nubigena Will.), fueron trasplantadas, cuando tenían un año de edad, a una cama de siembra con suelo de textura franco arenoso y fueron manejadas bajo condiciones de invernadero en Chapingo, Estado de México. El diseño experimental fue completamente al azar con 9 tratamientos (accesiones)...
Palavras-chave: Persea americana Mill.; Riego; Toxicidad; Salinidad; Recursos fitogenéticos; Irrigation; Toxicity; Salinity; Fitogenetic resources; Edafología; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/556

Caracterización de las aguas de la red hidrográfica México DF - Zona Metropolitana-Zumpango-Ixmiquilpan-Zimapán-Tamazunchale-Pánuco.
Provedor de dados: 32
Autores: Mercado Fernández, Teobaldis.
La presente investigación fue de carácter observacional, prospectivo, transversal y  descriptivo-analítico. A través de la caracterización físico-química de las aguas y la asociación de variables y parámetros, fue posible conocer la variación de la composición iónica y la concentración electrolítica, y estimar los valores mínimos y máximos del sodio intercambiable ( ), a partir de las diferentes formulaciones de la relación de adsorción de sodio   ( ). En el sector México DF-Zona Metropolitana-Zumpango-Ixmiquilpan-Zimapán, por donde circulan las aguas residuales que riegan el Valle del Mezquital, predominan los iones sodio ( ) y bicarbonato ( ); la relación funcional   con una pendiente de 0.7069 corresponde a aguas de tipo bicarbonatadas. De la población...
Palavras-chave: Salinidad; Sales hipotéticas; Sodicidad; RAS; PSI; Flujos freáticos; Salinity; Hypothetical salts; Sodicity; SAR; ESP; RSC; Ground water flows; Doctorado; Hidrociencias.
Ano: 2011
URL: http://hdl.handle.net/10521/467

Calidad de las aguas residuales urbano-industriales que riegan el Valle del Mezquital, Hidalgo, México
Provedor de dados: 32
Autores: Mendoza Saldivar, Isabel.
En la actualidad se ha usado prácticamente toda agua disponible para satisfacer los requerimientos de humedad de los diferentes cultivos que activamente se explotan en la agricultura bajo riego. Cada vez más se utilizan hasta el límite las aguas superficiales y subterráneas de la más variada composición química y concentración de sales. En México, se riegan aproximadamente 180 000 ha en diferentes valles intermontanos del Valle del Mezquital con aguas residuales urbano-industriales que derivan de la zona metropolitana del Valle de México, prácticamente sin ningún tratamiento. En este trabajo de investigación se analizan y discuten los efectos de los elementos inorgánicos que afectan la calidad del agua de riego residual urbano-industrial de la red...
Tipo: Tesis
Palavras-chave: Salinidad; Sodicidad; RAS; PSI; CSR; Doctorado; Hidrociencias; Salinity; Sodicity; SAR; ESP; RSC.
Ano: 2009
URL: http://hdl.handle.net/10521/1552

Calidad de aguas naturales y residuales en el sistema hidrográfico Valle del Mezquital, Hidalgo México.
Provedor de dados: 32
Autores: Barrios Castillo, Isaac Mateo.
Actualmente se ha usado prácticamente toda el agua disponible para satisfacer los requerimientos de los diferentes cultivos que se explotan en la agricultura bajo riego. Cada vez más se utilizan hasta el límite las aguas superficiales y subterráneas de la más variada composición química y concentración de sales. En México, se riegan aproximadamente 180,000 ha en diferentes lugares del Valle del Mezquital con aguas residuales urbano-industriales que derivan de la zona metropolitana del Valle de México, prácticamente sin ningún tratamiento. En esta investigación se analizan los efectos de los elementos inorgánicos que afectan la calidad del agua de riego residual urbano-industrial de la red hidrográfica Valle del Mezquital, Hidalgo. Se analizan los problemas...
Palavras-chave: Salinidad; Sodicidad; RAS; PSI; CSR; Salinity; Sodicity; SAR; ESP; RSC; Hidrociencias; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2281

Caracterización de las aguas y suelos de la red hidrográfica Zumpango-Ixmiquilpan-Zimapán, estado de Hidalgo, México.
Provedor de dados: 32
Autores: Castro Luna, Israel.
En el Valle del Mezquital, Estado de Hidalgo, México, se riega con aguas de origen urbano-industrial provenientes de la ciudad de México. Estas aguas se utilizan prácticamente sin ningún tratamiento, esto conlleva a la acumulación de las sales solubles y a la sodificación paulatina de los suelos. El objetivo de este trabajo de investigación de carácter descriptivo, permitió conocer como varían las composiciones iónicas y las concentraciones electrolíticas de las aguas residuales y estimar los niveles de sodio intercambiable, además de conocer valores máximos y mínimos, con base en la Relación de Adsorción de Sodio bajo diferentes formulaciones RASor, RASaj y RAS°corr. Se determinaron los siguientes parámetros: 1. Composición iónica de las muestras de agua...
Palavras-chave: Salinidad; Sodicidad; RAS; PSI; CSR; Presión osmótica; Salinity; Sodicity; SAR; ESP; RSC; Osmotic pressure; Doctorado; Hidrociencias.
Ano: 2011
URL: http://hdl.handle.net/10521/398

Micorriza arbuscular y estrés abiótico en el contenido de alcaloides (vinblastima y vincristina) de Catharanthus roseus (L.) G. Don
Provedor de dados: 32
Autores: Rosa Mera, Claudia Janette de la.
Este estudio evaluó el incremento de vinblastina y vincristina en plantas micorrizadas de  Catharanthus roseus (L.) G. Don., establecidas en invernadero, sometidas a estrés  abiótico causado por aplicaciones de bicarbonato de potasio (2.5 y 7.5 mM) y cloruro de  sodio (40 mM). El presente trabajo fue dividido en tres fases experimentales. La  primera fase describe la propagación de consorcios e identificación de hongos  micorrízicos arbusculares (HMA) obtenidos de la rizósfera de plantas medicinales  recolectadas del Parque Nacional Iztapopo, Zoquiapan y Anexas. En la segunda fase se  realizó una selección de consorcios de HMA con base en la promoción del crecimiento  en C. roseus. Finalmente, en la tercera fase se realizó una aplicación de bicarbonato de...
Tipo: Tesis
Palavras-chave: Planta medicinal; Vinca; Metabolitos secundarios; Alcalinidad; Salinidad; Maestría; Edafología; Medicinal plants; Secondary metabolites; Alkalinity; Salinity.
Ano: 2009
URL: http://hdl.handle.net/10521/1303

Respuestas fisiológica y molecular de plantas de arroz crecidas bajo estrés osmótico.
Provedor de dados: 32
Autores: García Morales, Soledad.
Las plantas están expuestas a diversos tipos de estrés abiótico incluyendo sequía y salinidad, los cuales constituyen los principales factores que limitan la productividad de los cultivos en el mundo. Para responder al estrés, las plantas han desarrollado una serie de mecanismos fisiológicos, bioquímicos y moleculares. Entre estos últimos, los factores de transcripción juegan un papel preponderante en la regulación de la expresión de genes, y su identificación y caracterización es esencial para la regulación transcripcional y conferir tolerancia al estrés. El objetivo de este trabajo fue analizar las respuestas fisiológicas de cuatro cultivares mexicanos de arroz al estrés osmótico dado por deshidratación y salinidad, así como las respuestas moleculares de...
Palavras-chave: Sequía; Deshidratación; Salinidad; RT-PCR en tiempo real; Regulación transcripcional; Drought; Dehydration; Salinity; Transcriptional regulation; Real time RT-PCR; Edafología; Doctorado; Oryza sativa.
Ano: 2012
URL: http://hdl.handle.net/10521/680

Caracterización de las aguas de la red hidrográfica México DF - Zona Metropolitana-Zumpango-Ixmiquilpan-Zimapán-Tamazunchale-Pánuco.
Provedor de dados: 32
Autores: Mercado Fernández, Teobaldis.
La presente investigación fue de carácter observacional, prospectivo, transversal y  descriptivo-analítico. A través de la caracterización físico-química de las aguas y la asociación de variables y parámetros, fue posible conocer la variación de la composición iónica y la concentración electrolítica, y estimar los valores mínimos y máximos del sodio intercambiable ( ), a partir de las diferentes formulaciones de la relación de adsorción de sodio   ( ). En el sector México DF-Zona Metropolitana-Zumpango-Ixmiquilpan-Zimapán, por donde circulan las aguas residuales que riegan el Valle del Mezquital, predominan los iones sodio ( ) y bicarbonato ( ); la relación funcional   con una pendiente de 0.7069 corresponde a aguas de tipo bicarbonatadas. De la población...
Palavras-chave: Salinidad; Sales hipotéticas; Sodicidad; RAS; PSI; Flujos freáticos; Salinity; Hypothetical salts; Sodicity; SAR; ESP; RSC; Ground water flows; Doctorado; Hidrociencias.
Ano: 2011
URL: http://hdl.handle.net/10521/467

Spatial and temporal trends in the distribution of macronutrients in surface waters of the Drake Passage
Provedor de dados: 67
Autores: Paparazzo,Flavio E.; Alder,Viviana A.; Schloss,Irene R.; Bianchi,Alejandro; Esteves,Jose L.
The Drake Passage (DP) links the Southern Pacific and Atlantic Oceans, and acts as a physical narrowing for the largest current of the World Ocean, the Antarctic Circumpolar Current (ACC). This result in a constriction of the main circumpolar fronts related to the ACC: the Subantarctic Front, the Polar Front, the Southern Antarctic Circumpolar Current Front and the Continental Water Boundary Front. Previous studies showed that the DP is a high-nutrient low-chlorophyll (HNLC) region, but studies on the interannual and seasonal macronutrients' fluctuations in relation with chlorophyll and frontal areas in the DP are scarce. This study analyzes the spatial and temporal trends of nitrate, phosphate, and silicate on surface samples from 113 oceanographic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrate; Phosphate; Silicate; Chlorophyll-a; Temperature; Salinity; Antarctic fronts; Antarctic zones; Seasonal variation; Interannual variation.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2016000100004

The importance of flood events on the establishment of seedlings and cuttings of saltcedar (Tamarix ramosissima)
Provedor de dados: 67
Autores: Natale,Evangelina; Reinoso,Herminda.
The expansion of invasive plants is considered one of the greatest threats to biodiversity. The environments more threatened by the presence of exotic invasive species are the riparian areas due to their small surface and high diversity. The advance of Tamarix in these environments may be linked to transient conditions of higher water availability, which would allow initial colonization. The objective of the present work was to determine which hydric conditions promote germination and establishment of Tamarix cuttings by measuring in the laboratory the effects of different periods of flooding. It was observed that the germination was high under irrigation at field capacity and was decreased after 10 days of flood, while the establishment through cuttings...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological invasion; Stress; Salinity; Plants.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2016000100001

Effects of 5-aminolevulinic acid (ALA)-containing supernatants from selected Rhodopseudomonas palustris strains on rice growth under NaCl stress, with mediating effects on chlorophyll, photosynthetic electron transport and antioxidative enzymes
Provedor de dados: 69
Autores: Nunkaew,Tomorn; Kantachote,Duangporn; Kanzaki,Hiroshi; Nitoda,Teruhiko; Ritchie,Raymond J.
Background: Rice is globally one of the most important food crops, and NaCl stress is a key factor reducing rice yield. Amelioration of NaCl stress was assessed by determining the growth of rice seedlings treated with culture supernatants containing 5-aminolevulinic acid (ALA) secreted by strains of Rhodopseudomonas palustris (TN114 and PP803) and compared to the effects of synthetic ALA (positive control) and no ALA content (negative control). Results: The relative root growth of rice seedlings was determined under NaCl stress (50 mM NaCl), after 21 d of pretreatment. Pretreatments with 1 &amp;#956;M commercial ALA and 10X diluted culture supernatant of strain TN114 (2.57 &amp;#956;M ALA) gave significantly better growth than 10X diluted PP803 supernatant...
Tipo: Journal article
Palavras-chave: 5-Aminolevulinic acid (ALA); Antioxidative enzymes; Chlorophyll fluorescence; Rhodopseudomonas palustris; Rice; Salinity.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000100004

Isolation of purple nonsulfur bacteria for the removal of heavy metals and sodium from contaminated shrimp ponds
Provedor de dados: 69
Autores: Panwichian,Saijai; Kantachote,Duangporn; Wittayaweerasak,Banjong; Mallavarapu,Megharaj.
In order to determine whether waters used for the shrimp cultivation contained toxic levels of heavy metals (HMs) and sodium (Na), analysis was carried out on 31 shrimp ponds in areas of southern Thailand. Purple nonsulfur bacteria (PNB) were also isolated from the same ponds to investigate if they could be used for bioremediation of the above contaminants. The highest HMs concentrations of the sediment samples in mg/kg dry weight were found as follows: 0.75 cadmium (Cd), 62.63 lead (Pb), 34.60 copper (Cu) and 58.50 zinc (Zn). However, all sediment samples met Hong Kong standards for dredged sediment. In contrast, contamination of Cu (9-30 µg/L) and Zn (140-530 µg/L) exceeding the standard guidelines for marine aquatic animal set by the Pollution Control...
Tipo: Journal article
Palavras-chave: Bioremediation; Heavy metals; Purple nonsulfur bacteria; Salinity; Shrimp farming.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000400003

Salinity effects on protein content, lipid peroxidation, pigments, and proline in Paulownia imperialis (Siebold &amp;amp; Zuccarini) and Paulownia fortunei (Seemann &amp;amp; Hemsley) grown in vitro
Provedor de dados: 69
Autores: Ayala-Astorga,Gloria Irma; Alcaraz-Meléndez,Lilia.
We evaluated the effects of saline stress on soluble proteins, lipid peroxidation (TBAR), chlorophyll a, chlorophyll b, &amp;#946;-carotene, violaxanthin, and proline in Paulownia imperialis and Paulownia fortunei plants grown in vitro. When the propagated plants reached a determined size, they were transferred aseptically to WPM culture medium containing different sodium chloride concentrations (0, 20, 40, 60, 80, and 160 mM) and were sampled at 15 and 30 days. Proline content was determined at 30 days after transfer only. Protein concentration significantly decreased with the highest salt levels in P. imperialis compared to controls in which no sodium chloride was added. In both P. imperialis and P. fortunei, lipid peroxidation significantly increased at...
Tipo: Journal article
Palavras-chave: Paulownia fortunei; Paulownia imperialis; Pigments; Proline; Proteins; Salinity; TBARS; Tissue culture.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500013

Yield of cotton/cowpea and sunflower/cowpea crop rotation systems during the reclamation process of a saline-sodic soil
Provedor de dados: 70
Autores: Sousa,Carlos H. C. de; Lacerda,Claudivan F. de; Silva,Francisco L. B. da; Neves,Antonia L. R.; Costa,Raimundo N. T.; Gheyi,Hans R.
The objective of this study was to evaluate the use of subsoiling, gypsum and organic matter associated with the cultivation of cotton, sunflower and cowpea in crop rotation, seeking the reclamation and use of a saline-sodic soil. The treatments were arranged in a randomized block design in split plots with four replications, during two crop cycles (2009/2010 and 2010/2011). The plots were formed by the treatments: T1. Subsoiling (S); T2. S + 20 Mg ha-1 of gypsum; T3. S + 40 Mg ha-1 of organic matter; T4. S + 10 Mg ha-1 of gypsum + 20 Mg ha-1 of organic matter; T5. S + 20 Mg ha-1 of gypsum + 40 Mg ha-1 of organic matter and the sub-plots consisted of the cotton-cowpea (C/CP) and sunflower-cowpea (S/CP) crop rotation. The use of gypsum and organic matter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Sodicity; Gossypium hirsutum; Helianthus annuus; Vigna unguiculata.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500006

Concentration of injetion solution and its effects on soil and on yield of fertirrigated banana cv. Terra Maranhão
Provedor de dados: 70
Autores: Coelho,Eugênio F.; Andrade Neto,Torquato M. de; Barros,Damiana L.
The Fertigation is the combined application of water and nutrients to a crop. It can be adapted to all types of agricultural crops. The objective of this study was to evaluate the effect of urea concentration in irrigation water on electrical conductivity of the soil solution and saturation extract along the first cycle of banana cv. Terra Maranhão. The experiment followed a completely randomized design with six treatments and ten replications. Treatments regarded for using three urea concentrations (1.0; 2.5 and 4.0 g L-1) in irrigation water applied by two micro irrigation systems (microsprinkler and drip). Results showed that there was a linear elevation of electrical conductivity of saturation extract and soil solution with the increase on...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Urea; Salinity; Fertirrigation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600007

CONSUMPTION, EFFICIENCY AND WATER CONTENT OF ARUGULA UNDER DIFFERENT MANAGEMENT OF BRACKISH NUTRITIONAL SOLUTIONS
Provedor de dados: 70
Autores: Campos Júnior,José E.; Santos Júnior,José A.; Silva,Ênio F. de F. e; Martins,Juliana B.; Rolim,Mário M.
ABSTRACT The need to use strategies for using brackish water in agriculture, especially in semi-arid conditions, is evident. Based on this information, this study was developed with the aim of evaluating the consumption, efficiency and water content, as well as the dry mass of the arugula plants (cv. Broad Leaf) exposed to brackish nutrient solutions as a function of replacement strategies and circulation frequencies. The treatments consisted of six salinity levels of the nutrient solution (1.5, 3.0, 4.5, 6.0, 7.5 and 9.0 dS m-1) and two circulation frequencies (twice a day 8 a.m. and 4 p.m., and three times a day at 8 a.m., 12 p.m. and 5 p.m.). In Experiment I, the evapotranspiration line was replaced with the respective brackish water used in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eruca sativa; Cultivation without soil; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600885

HYDROPONIC CULTIVATION OF CORIANDER USING FRESH AND BRACKISH WATERS WITH DIFFERENT TEMPERATURES OF THE NUTRIENT SOLUTION
Provedor de dados: 70
Autores: Silva,Mairton G. da; Soares,Tales M.; Gheyi,Hans R.; Oliveira,Mateus G. B. de; Santos,Caroline C. dos.
ABSTRACT A large number of studies on salinity in hydroponic systems have been carried out, but few of them have evaluated the interaction between salinity and nutrient solution temperatures. Two experiments were carried out in a randomized block design from January to February (Experiment I) and June to July 2018 (Experiment II). Experiment I consisted of treatments with five combinations, as follows: unheated (control) and heated nutrient solution (NS) at a temperature of 32°C using fresh water with an electrical conductivity (ECw) of 0.3 dS m−1, and unheated and heated NS at temperatures of 30 and 32°C using brackish water with an ECw of 6.5 dS m−1 in the main plots, with two coriander cultivars (Tabocas and Verdão) in the subplots, which were grown in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coriandrum sativum L. abiotic stress shoot fresh matter hydroponics; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600674

Watermelon fertigation with electrical conductivity and ph monitoring in the soil solution
Provedor de dados: 70
Autores: DA SILVA JÚNIOR,MANOEL J.; VIANA,PAULA C.; MEDEIROS,JOSÉ F. DE; LIMA,JOÃO G. A.; TARGINO,ANA J. DE O.
ABSTRACT In the olericulture, in general, is practiced intensive fertilization, which creates a risk of salinization and change of high pH, ​​which if not well monitored can cause production losses, excessive spending on fertilizers and environmental contamination. We developed this study with the aim of controlling fertigation on watermelon through the behavior of the electrical conductivity (EC) and pH in the soil solution obtained through porous ceramic cups extractors. The EC and pH values ​​were corrected by the current soil moisture for the moisture field capacity, due to different moisture values ​​at the time of extraction. The monitoring comprised 19 assessments during 80 days of cultivation. We can control the pH and EC of the soil and maintain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrullus lanatus; Fertilization; Solution extractors; Salinity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000400622

Efficiency of water use in sunflower grown in hydroponic system under saline stress
Provedor de dados: 70
Autores: Santos Júnior,José Amilton; Gheyi,Hans R.; G. Filho,Doroteu H.; Soares,Frederico A. L.; Dias,Nildo da S.
In order to identify alternatives for the use of saline water in agricultural production, the effects of the use of brackish water in the preparation of the nutrient solution for the cultivation of sunflower (cv. EMBRAPA 122-V2000) were studied in hydroponic system on consumption and efficiency of water use for the production of achenes and biomass. A completely randomized design was used, analyzed in a 5x2 factorial scheme with three replications. The factors studied were five levels of salinity of nutrient solution (1.7 - control; 4.3; 6.0; 9.0; and 11.5dS m-1) and two plant densities - one or two plants per vessel. It was concluded that the water consumption of sunflower is a variable sensitive to the salinity of the nutrient solution, especially after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Plant density; Soilless culture; Helianthus annuus L.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400011

INGESTIVE BEHAVIOR OF SANTA INÊS SHEEP UNDER THERMONEUTRALITY AND THERMAL STRESS UPON CONSUMPTION OF SALINE WATER
Provedor de dados: 70
Autores: Furtado,Dermeval A.; Carvalho Júnior,Sebastião B. de; Souza,Bonifácio B. de; Dantas,Nayanne L. B.; Rodrigues,Ladyanne R.
ABSTRACT The consumption of saline water in semiarid regions is a recurrent situation that can affect the ingestive behavior of small ruminants. This study evaluated the ingestive behavior of Santa Inês sheep maintained in a climatic chamber under two air temperatures -25 °C within the thermal comfort zone (TCZ) and 32 °C above the TCZ - and consuming water with three levels of salinity - 2.0, 4.0, and 8.0 dS m-1. The experimental design was completely randomized in 2 × 3 factorial schemes, comprising two air temperatures and drinking water with three levels of salinity, in six replicates (animals). Regardless of air temperature, the consumption of saline water did not affect feed and water intake by the sheep; however, there was a decrease in feed intake...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climatic chamber; Feed intake; Idleness; Ovis aries; Salinity; Water intake.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162021000100019

ADDITION OF BOILER CHARCOAL WASTE TO COMPOST FOR USE AS SUBSTRATE FOR VEGETABLE SEEDLINGS
Provedor de dados: 70
Autores: Lorin,Higor E. F.; Costa,Mônica S. S. de M.; Chiarelotto,Maico; Santos,Francielly T. dos; Costa,Luiz A. de M.
ABSTRACT The recovery of waste from the broiler production chain (BPC) is consistent with the principles of a circular economy. Besides turning waste into organic compost, its use as substrate for the production of vegetable seedlings further increases its economic value. However, it is necessary to adapt its characteristics to enable its use as substrate. To this end, the addition of boiler remnant charcoal wastes (BCW), another type of waste generated in the BPC, to the organic compost resulting from the composting of BPC waste with different bulking agents (BAs) was studied. The addition of BCW to agro-industrial compost reduced the electrical conductivity (EC) of substrates. Multiple linear regression showed that, of the 13 variables (physical,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Electrical conductivity; Circular economy; Easiness of removal of clod from tray; Seedling quality index; Salinity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600753

REMOTE SENSING OF SEA SURFACE SALINITY: A CASE STUDY IN THE BURDEKIN RIVER, NORTH-EASTERN AUSTRALIA
Provedor de dados: 72
Autores: Heron,M.L; Prytz,A; Stieglitz,T; Burrage,D.M.
The principles of remotely sensing sea surface salinity are briefly reviewed. The airborne instrument used for this study is a Scanning Low Frequency Microwave Radiometer (SLFMR). It has spatial resolution of typically 500m (depending on the altitude of the aircraft) and a salinity resolution of about 1 psu. This configuration is suitable for studying the dynamics of river plumes as they form on the continental shelf. The Burdekin River is one of Australia's major rivers with about 2.4% of the annual runoff from the continent. This river is in the dry tropics and has severe transient peaks which last for days to weeks during the summer monsoon season. The case study shows the river plume during growth and decay phases and is supported with in situ vertical...
Tipo: Journal article
Palavras-chave: Salinity; Microwave radiometer; Airborne; Remote sensing; River plume; Burdekin River.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200050

Regulation of Na+ and K+ homeostasis in plants: towards improved salt stress tolerance in crop plants
Provedor de dados: 74
Autores: Almeida,Diego M.; Oliveira,M. Margarida; Saibo,Nelson J. M.
Abstract Soil salinity is a major abiotic stress that results in considerable crop yield losses worldwide. However, some plant genotypes show a high tolerance to soil salinity, as they manage to maintain a high K+/Na+ ratio in the cytosol, in contrast to salt stress susceptible genotypes. Although, different plant genotypes show different salt tolerance mechanisms, they all rely on the regulation and function of K+ and Na+ transporters and H+ pumps, which generate the driving force for K+ and Na+ transport. In this review we will introduce salt stress responses in plants and summarize the current knowledge about the most important ion transporters that facilitate intra- and intercellular K+ and Na+ homeostasis in these organisms. We will describe and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Sodium; Potassium; Proton pumps; Ion transporters.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200326

Growth and yield of lettuce plants under salinity
Provedor de dados: 75
Autores: Andriolo,Jerônimo L.; Luz,Gean L. da; Witter,Maiquel H.; Godoi,Rodrigo dos S.; Barros,Gisele T.; Bortolotto,Orcial C.
Lettuce plants, cv. Vera, were grown under five salinity levels in a hydroponical experimental set-up using a 0.15 m deep sand growing bed. A standard nutrient solution was used, with the following composition, in mmol L-1: 16.9 NO3-; 2.0 H2PO4-; 1.0 SO4- 4.0 Ca++; 10.9 K+ e 1.0 Mg++, and, in mg L-1, 0.42 Mn; 0.26 Zn; 0,05 Cu; 0,50 B; 0,04 Mo, and 4.82 chelated Fe. The five salinity levels compared as treatments were obtained by varying the concentration of the standard nutrient solution, reaching average electrical conductivities (EC) of 0.80; 1.93; 2.81; 3.73 and 4.72 dS m-1, for T1, T2, T3, T4 and T5, respectively. The nutrient solution at each salinity level was supplied from a reservoir by means of a flooded-type electrical pump, for 15 minutes, at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Fertigation; Hydroponics; Salinity.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362005000400014

Growth, water consumption and mineral composition of watercress under hydroponic system with brackish water
Provedor de dados: 75
Autores: Lira,Raquele M; Silva,Ênio FF; Silva,Gerônimo F; Soares,Hammady R; Willadino,Lilia G.
ABSTRACT The underground water reserves in the semi-arid region present high salinity levels. However, the scarcity of the resource compels the use of this water for several human activities, including agriculture. The aim of this work was to evaluate the use of brackish water for watercress cultivation (Nasturtium officinale) in a hydroponic NFT system (laminar flow of nutrients) and effects on water consumption, growth, yield and nutrient extraction by the plant. We studied six levels of salinity (0.2; 1.2; 2.2; 3.2; 4.2 and 5.2 dS m-1), in a completely randomized experimental design, with four replicates. Salinity was obtained by the addition of NaCl into the local water supply, being these waters used to prepare the nutrient solution and to replace the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nasturtium officinale; Nutrient solution; NFT system; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000100013

Minitomato cultivation with substrate under different fertigation management strategies
Provedor de dados: 75
Autores: Bezerra,Ricardo S; Evangelista,Adão Wagner P; Alves Júnior,José; Nascimento,Abadia R; Casaroli,Derblai.
ABSTRACT The application of high level of fertilization and inadequate management of fertigation in tomato crop can promote increase of salinity of the solution, nutritional imbalance and physiological disorders in the plants, consequently reduces the productivity and the quality of the fruits. The aim of this study was to evaluate different fertigation strategies in growth and production of mini tomato plants cultivated with substrate in a greenhouse. The experimental design was in randomized complete blocks with four treatments and twenty replicates. The treatments corresponded to four fertigation strategies, as follows: T1 [(control) fertigation with leaching of 20%]; T2 fertigation throughout the day and irrigation at the end of the day with leaching...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Salinity; Leaching.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000100088

Production and quality of grafted watermelon in saline soil
Provedor de dados: 75
Autores: Suárez-Hernández,Ángel Manuel; Vázquez-Angulo,Juan Carlos; Grimaldo-Juárez,Onecimo; Duran,Carlos Ceceña; González-Mendoza,Daniel; Bazante-González,Isidro; Mendoza-Gómez,Aurelia.
ABSTRACT Salinity of soil in arid and semiarid regions is a problem that affects the production and quality of fruit. That’s while we evaluated grafting on watermelon plants as an alternative to reduce the salinity effects. The experimental design was of randomized blocks, three treatments (cultivars Sangria, Summer Flavor 800 and Summer Flavor 840) with three repetitions. The cultivars were evaluated in grafted and ungrafted condition. The rootstock used for grafting was the interspecific hybrid Strong Tosa (C. maxima x C. moschata). In average terms for the three cultivars, grafting increased commercial production, weight, length and diameter of fruits in 160.5%, 36.5%, 12.0% and 7.5%, respectively. Sangria presented the best answer in production with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrullus lanatus; Graft; Salinity; Pulp color; Lycopene.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000200215

Diversity and Variability of the Cорероd Behaviour in Environmental Gradients: an Overview
Provedor de dados: 13
Autores: Seregin, S. A.; Piontkovski, S. A.
The overview is based on results of long-term experimental studies оf the authors and literature data, and applies to copepod species from plankton of the Black Sea, the Mediterranean Sea and the Atlantic Ocean. The work has incorporated the analysis of diversity and variability of the locomotory acts under the impact of abiotic factors: light, temperature, salinity, and the turbulent diffusion. Variability of locomotory activity depending on intensity, orientation (for the scalar factors), from a various combination of the environmental factors is shown. One of the mechanisms of a preferred conditions selection and phenomenon of a polymodality of copepod distribution in gradient conditions of environment is analyzed on an example of Acartia clausi...
Tipo: Journal Contribution
Palavras-chave: Diversity; Copepod behaviour; Light; Temperature; Salinity; Turbulent diffusion; Pазнообразие; Поведение копепод; Свет; Температура; Соленость; Турбулентная диффузия Light Temperature Salinity Turbulent diffusion Light Temperature Salinity http://aims.fao.org/aos/agrovoc/c_4322 http://aims.fao.org/aos/agrovoc/c_7657 http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/148

Relatório de identificação e reconhecimento.
Provedor de dados: 14
Autores: VALDIVIESO SALAZAR, C. R.; CORDEIRO, G. G.
O problema de drenagem e salinidade: diagnóstico preliminar.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Salinidade; Drenagem; Salinity.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134956

Solos afetados por sais.
Provedor de dados: 14
Autores: PEREIRA, J. R.
Tolerancia das culturas a salinidade; Recuperacao de solos afetados por sais.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Recuperacao; Soils; Reclamation; Salinidade; Solo; Salinity.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132818

Levantamento das condições de salinidade e sodicidade do Projeto de Irrigação de São Gonçalo (2a. parte).
Provedor de dados: 14
Autores: CORDEIRO, G. G.; BARRETO, A. N.; CARVAJAL, A. C. N.
O trabalho objetivou completar o diagnóstico da situação de salinidade de todas área do Perímetro Irrigado de São Gonçalo; Identificar áreas com problemas e/ou possibilidades de salinização e sodificação através de amostragem de solo e indicá-las por meio de técnicas cartográficas.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Projeto de Irrigação São Gonçalo; Irrigation project.; Solo; Levantamento; Salinidade; Solo Sódico.; Solo Salino; Soil; Sodic soils; Saline soils; Salinity; Surveys.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131817

Programa de pesquisas prioritárias em tecnologia de irrigação para o Nordeste.
Provedor de dados: 14
Autores: MILLAR, A. A.
Introducao; antecedentes sobre o Nordeste; programa de pesquisa para as areas irrigadas; pesquisa em irrigacao; pesquisa em manejo de solo eagua para as areas irrigadas com problemas de sais; transferencia da tecnologia gerada.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Nordeste; Northeast; Management; Irrigação; Água; Manejo; Pesquisa; Salinidade; Solo; Irrigation; Research; Salinity; Soil; Water.
Ano: 1978
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/159839

Drenagem subterrânea no perímetro irrigado de Bebedouro. I: estudo do lençol freático.
Provedor de dados: 14
Autores: VALDIVIESO SALAZAR, C. R.; CORDEIRO, G. G.; PONTE, P. D.
Este estudo visou coletar informacoes sobre a posicao e flutuacao do lencol freatico, procurando identificar as areas problema, a sua extensao e severidade, e determinar a necessidade ou nao, de drenagem artificial complementar.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Pernambuco; Petrolina; Projeto Bebedouro; Underground drainage.; Irrigação; Drenagem Subterrânea; Lençol Freático; Salinidade.; Irrigation; Salinity; Water table.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133653

Monitoramento do lencol freatico e da salinidade do solo.
Provedor de dados: 14
Autores: CORDEIRO, G. G.; SOARES, J. M.; RICHE, G.
Descricao do perfil do solo, condutividade hidraulica, estudo do lencol freatico, estudo de drenagem na Fazenda Frutivale, analise quimica da agua do lencol e de drenagem, salinidade dos solos, profundidade dos drenos, altura maxima do lencol no ponto medio entre drenos, espacamento entre drenos recomendados para cada area da Fazenda Frutivale.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Solo; Lençol Freático; Salinidade; Salinity; Soil; Water table.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131824

Avaliação econômica da recuperação de solos salinos no perímetro irrigado de Vaza-Barris- Cocorobó, BA.
Provedor de dados: 14
Autores: VALDIVIESO SALAZAR, C. R.; FELIX, S. G.; CORDEIRO, G. G.
Como parte do programa de controle da salinidade e recuperacao de solos salinos, adotado pelo Departamento Nacional de Obras Contras as Secas- DNOCS, foram instalados 106 ha de drenagem subterranea no Setor I, do Perimetro Irrigado de Vaza-Barris PIVB. No acompanhamento e supervisao da instalacao, foram levantados os custos envolvidos da drenagem e avaliados em testes de campo, o potencial de recuperacao dos solos drenados, as limitacoes e o retorno da atividade na primeira fase de recuperacao com a conducao de uma cultura de sorgo, a partir da qual projetou-se um esquema de avaliacao economica, para um periodo de dez anos. O custo total de recuperacao foi 220,07 OTN/ha, dos quais 184,5 OTN/ha constituiram o custo da drenagem subterranea. Cada lavagem sem...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Recuperação; Vaza-barris; Bahia; Reclamation; Natural resource.; Solo; Recurso natural; Drenagem; Irrigação; Salinidade.; Drainage; Irrigation; Salinity; Soil.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133657

Níveis de tolerância das culturas e teores de sais no solo e na água de irrigação.
Provedor de dados: 14
Autores: CORDEIRO, G. G.
bitstream/CPATSA/8761/1/INT38.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Tolerância ao sal; Soils.; Água; Irrigação; Planta; Salinidade; Solo.; Soil; Crops; Irrigation; Salinity; Salt tolerance; Water.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134096

Agua salina: e possivel irrigar com ela.
Provedor de dados: 14
Autores: SOARES, J. M.; CORDEIRO, G. G.
Verificou-se nos tres sistemas de manejo (drenagem natural com lamina de irrigacao Li) (aproximadamente igual ao uso consuntivo das culturas); drenagem com manilhas, com a mesma lamina de irrigacao; e drenagem com manilhas, com lamina de irrigacoa igual a 1, 2, Li&gt;), uma elevada influencia das chuvas no processo de lixiviacao dos sais, o que abre boas perspectivas para o aproveitamento de agua salina para irrigacao, nas condicoes em que os experimentos estao sendo realizados. Nos testes, tem sido utilizados os capins elefante e Panicum colaratum.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Irrigação; Água; Drenagem; Salinidade; Irrigation; Salinity; Water.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133420

Structure of the upper water column in the northwest North Atlantic: Modern versus last glacial maximum conditions
Provedor de dados: 5
Autores: De Vernal, A; Hillaire-marcel, C; Peltier, Wr; Weaver, Aj.
During the Last Glacial Maximum, the northwestern North Atlantic constituted a major conduit for Labrador and Greenland ice sheet meltwaters. Vertical density gradients in its upper water masses have been reconstructed by combining information from transfer functions based on dinocysts and from oxygen isotope measurements (delta(18)O) in planktonic foraminifera. Transfer functions yield temperature and salinity and thus potential density (sigma(theta)) for the warmest (August) and coldest (February) months in the photic zone. The delta(18)O values in different size fractions of epipelagic (Globigerina bulloides) and mesopelagic (Neogloboquadrina pachyderma left-coiled (Np1)) foraminifera allow us to assess sigma(theta) gradients through the pycnocline...
Tipo: Text
Palavras-chave: Last Glacial Maximum; LGM; North Atlantic; Salinity; Density; Pycnocline.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00223/33405/31861.pdf

Influence des apports fluviatiles en Baie de Seine
Provedor de dados: 5
Autores: Avoine, J; Crevel, L.
Hydrological study of Seine Bay displays two areas differentiated by salinity distribution. One has marine characteristics and the other is under fluvial influence. In this paper the authors give the main results of exchanges between the environments, obtained by the study of water dilution, solid particles dispersion, and their contribution to sedimentation.
Tipo: Text
Palavras-chave: Estuarine front; River plumes; Trace metals; Salinity; Residual flow; Seasonal variations; Environmental effects; Sediment dynamics; Estuarine sedimentation; River discharge.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1275.pdf

Variabilité de la salinité de surface d'après un modèle global de couche mélangée océanique
Provedor de dados: 5
Autores: Michel, Sylvain.
Sea surface salinity (SSS) influences numerous oceanic phenomena, for instance surface water ventilation, deep water formation and thermohaline circulation. SSS also controls some ocean-atmosphere coupled processes, such as the intensity of freshwater flux and the penetration of heat flux and turbulence. Salinity is more difficult to measure than temperature from in situ surveys, which results in 20 times less data being currently available. Moreover, sea surface temperature (SST) is routinely estimated from satellites, which is not possible yet for SSS. Two space missions will fill this gap soon: SMOS from the European Space Agency and Aquarius/SAC-D from NASA and CONAE.  To contribute to the SMOS project, we propose a method for estimating SSS from...
Tipo: Text
Palavras-chave: SMOS; SSS; SST; MLD; Heat balance; Vertical entrainment; Geostrophic current; Air sea fluxes; Satellite observations; Mixed layer; Salinity; SMOS; SSS; SST; MLD; Bilan de chaleur; Entraînement vertical; Courants géostrophiques; Flux air mer; Observations satellitaires; Couche mélangée; Salinité.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-2302.pdf

The intermediate Mediterranean water inflow along the northern slope of the Iberian Peninsula
Provedor de dados: 5
Autores: Diaz Del Rio, G; Gonzalez, N; Marcote, D.
During the SEFOS 95 cruise (25 March to 15 April 1995) (figure I) a number of CTD casts were made in order to study the intermediate Mediterranean water (IMW) off the west and north coasts of the Iberian Peninsula. One long-term mooring, for current measurement at four levels, was deployed at 43 degrees 57' N - 5 degrees 51' Vii from February to May. We establish a picture of the distribution and transformation of the IMW along the coast of the Iberian Peninsula based on the thermohaline characteristics of the water masses and the determination of the percentage content of the IMW by the use of the triangle of vertical mixing of the North Atlantic central water (NACW), IMW and Labrador water (LW) [3]. A generalised temperature/salinity (T/S) curve is...
Tipo: Text
Palavras-chave: Masse d'eau; Eau centrale nord-atlantique; Eau intermédiaire méditerranéenne; Eau du Labrador; Salinité; Water mass; North Atlantic central water; Intermediate Mediterranean water; Labrador water; Salinity.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00326/43676/43195.pdf

pH controls spermatozoa motility in the Pacific oyster (     Crassostrea gigas     )
Provedor de dados: 5
Autores: Boulais, Myrina; Suquet, Marc; Arsenault-pernet, Marie Eve Julie; Malo, Florent; Queau, Isabelle; Pignet, Patricia; Ratiskol, Dominique; Le Grand, Jacqueline; Huber, Matthias; Cosson, Jacky.
Investigating the roles of chemical factors stimulating and inhibiting sperm motility is required to understand the mechanisms of spermatozoa movement. In this study, we described the composition of the seminal fluid (osmotic pressure, pH, and ions) and investigated the roles of these factors and salinity in initiating spermatozoa movement in the Pacific oyster. The acidic pH of the gonad (5.82 ± 0.22) maintained sperm in the quiescent stage and initiation of flagellar movement was triggered by a sudden increase of spermatozoa external pH (pHe) when released in seawater (SW). At pH 6.4, percentage of motile spermatozoa was three times higher when they were activated in SW containing 30 mM NH4Cl, which alkalinizes internal pH (pHi) of spermatozoa, compared...
Tipo: Text
Palavras-chave: Seminal fluid; Spermatozoa; Motility; PH; Salinity; Ions.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00428/53976/55137.pdf

Etude des mortalités ostréicoles de l'hiver 1998/1999 en Baie des Veys. Caractérisation et analyse temporelle des dessalures observées sur les parcs conchylicoles de la baie de Veys depuis 1996.
Provedor de dados: 5
Autores: Ropert, Michel; Kopp, Joel.
The Shellfish Laboratory of Normandy (LCN : Laboratoire Conchylicole de Normandie) observed unusual hydrologic anomalies associated with important oyster mortalities during the winter of 1999. These anomalies were described as sudden salinity variations during the lidal cycle, particularly on the rising tide. Starting in 1996 a multi-parameter probe was used to monitor salinity, temperature and depth every 10 to 20 minutes in the inter-tidal zone. Alter data processing and filtering, two criteria concerning low salinity were chosen : amplitude and duration. Application of a cumulative function (Ibanez et al., 1993) to this time series data treatment showed the 3 year trend (1996-1999). Salinity variation data and climatic data were used in a multivariate...
Tipo: Text
Palavras-chave: Crassostrea gigas; Mortalités; Salinité; Baie des Veys; Suivi; Crassostrea gigas; Mortality; Salinity; Baie of Veys; Monitoring.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00102/21310/18928.pdf

MEDAR/MEDATLAS 2002: A Mediterranean and Black Sea database for operational oceanography Elsevier Oceanography Series
Provedor de dados: 5
Autores: Fichaut, Michele; Garcia, Maria-jesus; Giorgetti, Alessandra; Iona, Athanasia; Kuznetsov, Alexander; Rixen, Michel; Medar Group,.
A comprehensive database of temperature, salinity and bio-chemical parameters in the Mediterranean and Black Sea has been constructed through comprehensive co-operation between the bordering countries. Statistical climatologies have been computed with all assembled and quality controlled data. The database, designed to initiate and validate prediction models, also represents a system to quality-check new incoming data produced by ocean observing systems.
Tipo: Text
Palavras-chave: Database; Temperature; Salinity; Nutrients; Climatology; Quality control.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00351/46177/45876.pdf

Overview of the SMOS sea surface salinity prototype processor
Provedor de dados: 5
Autores: Zine, S; Boutin, J; Font, J; Reul, Nicolas; Waldteufel, P; Gabarro, C; Tenerelli, Joseph; Petitcolin, F; Vergely, J; Talone, M; Delwart, S.
The L-band interferometric radiometer onboard the Soil Moisture and Ocean Salinity mission will measure polarized brightness temperatures (Tb). The measurements are affected by strong radiometric noise. However, during a satellite overpass, numerous measurements are acquired at various incidence angles at the same location on the Earth's surface. The sea surface salinity (SSS) retrieval algorithm implemented in the Level 2 Salinity Prototype Processor (L2SPP) is based on an iterative inversion method that minimizes the differences between Tb measured at different incidence angles and Tb simulated by a full forward model. The iterative method is initialized with a first-guess surface salinity that is iteratively modified until an optimal fit between the...
Tipo: Text
Palavras-chave: Salinity; Oceanography; Microwave radiometry.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3914.pdf

S'acclimater à des salinités et températures changeantes : un focus sur la branchie chez le loup européen Dicentrarchus labrax
Provedor de dados: 5
Autores: Masroor, Waliullah.
The European sea bass Dicentrarchus labrax undertakes seasonal migrations to estuaries and lagoons that are characterized by fluctuations in environmental conditions. It is unclear to what extent salinity acclimation mechanisms are affected at temperatures higher than in the sea, as usually encountered in transitional waters in spring and summer. In this study, juvenile sea bass were pre-acclimated to seawater (SW) at 18 °C (temperate) or 24 °C (warm) for two weeks and then transferred to either fresh water (FW) or SW at the considered temperatures. We have shown that sea bass are able to efficiently maintain blood osmolality at 24 °C at both salinities. However, temperature increase induced significant changes regarding several physiological traits...
Tipo: Text
Palavras-chave: Salinité; Poisson téléostéen; Écophysiologie; Branchies; Transport ionique; Salinity; Ecophysiology; Teleost fish; Temperature; Gills; Ion transport.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61175/64661.pdf

Impact du barrage d'Arzal sur la qualité des eaux de l'estuaire et de la baie de la Vilaine
Provedor de dados: 5
Autores: Merceron, Michel.
The Arzal dam upon the Vilaine estuary provokes an aggravation of a recurrent summer hypoxia of the bottom waters in the bay of  Vilaine.
Tipo: Text
Palavras-chave: Suspended sediments; Salinity; Coastal zone; Dam estuary; Oxygen depletion; Matières en suspension; Salinité; Zone côtière; Estuaire; Barrage; Anoxie.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-2658.pdf

Caracteristiques saisonnieres de l'hydrobiologie du complexe estuariende Marennes-Oleron (France).
Provedor de dados: 5
Autores: Heral, Maurice; Razet, Daniel; Deslous-paoli, Jean-marc; Berthome, Jean-paul; Garnier, J.
Four seasonal compaigns providing a sampling of 15 stations each followed during half a tide cycle, i.e. 120 water samples permit the definition of the main hydrobiological features of Marennes-Oleron Bay: salinity and turbidity, phytoplanktonic biomasses, ATP concentrations. The authors suggest that a new way of adapted sampling to their objectives, will work out in the future by sampling during tidal cycles but as frequently as possible.
Tipo: Text
Palavras-chave: Seasonal variations; Salinity; ATP; Estuaries; Turbidity; Hydrobiology; Salinity; Phytoplankton; Estuaries; Biomass; Hydrobiology; Physicochemical properties; Phytoplankton; Environmental conditions; Biomass.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1854.pdf

MIMOC: A global monthly isopycnal upper-ocean climatology with mixed layers
Provedor de dados: 5
Autores: Schmidtko, Sunke; Johnson, Gregory C.; Lyman, John M.
A monthly, isopycnal/mixed-layer ocean climatology (MIMOC), global from 0 to 1950dbar, is compared with other monthly ocean climatologies. All available quality-controlled profiles of temperature (T) and salinity (S) versus pressure (P) collected by conductivity-temperature-depth (CTD) instruments from the Argo Program, Ice-Tethered Profilers, and archived in the World Ocean Database are used. MIMOC provides maps of mixed layer properties (conservative temperature, , absolute salinity, SA, and maximum P) as well as maps of interior ocean properties (, SA, and P) to 1950dbar on isopycnal surfaces. A third product merges the two onto a pressure grid spanning the upper 1950dbar, adding more familiar potential temperature () and practical salinity (S) maps....
Tipo: Text
Palavras-chave: Climatology; Global; Temperature; Salinity; Mapping; Objective mapping.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00383/49447/49930.pdf

Comment on “Sedimentation Controls on Methane‐Hydrate Dynamics Across Glacial/Interglacial Stages: An Example From International Ocean Discovery Program Site U1517, Hikurangi Margin”
Provedor de dados: 5
Autores: Sultan, Nabil.
In the IODP 372A proposal, working hypotheses used with respect to actively deforming gas hydrate‐bearing landslides were based on an initial calculation considering gas hydrate to occur in fresh water. This initial inaccuracy leads to predict the base of methane hydrate stability zone (MHSZ) to be at around 162 meters below the seafloor (mbsf) at site U1517 while it is expected to be between 85 and 128 mbsf. It is most interesting that important negative chloride anomalies were measured well below the theoretical MHSZ without direct evidence of the presence of gas hydrate. These anomalies are usually a strong indication of gas hydrate occurrence. This initial inaccurate hypothesis provides the opportunity to evaluate the effectiveness of the indirect...
Tipo: Text
Palavras-chave: Hikurangi; Hydrate; IODP; Salinity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00628/74043/73389.pdf

Les virus de l'estuaire de la Charente el du bassin de Marennes-Oleron. Dynamiques spatio-temporelles et  interactions avec les communautés bactériennes
Provedor de dados: 5
Autores: Auguet, Jean-christophe.
This study is divided in two parts; one aim is to evaluate the in situ spalio-temporal dynamics of viral communities  in the Charante estuary in order to define the appropriate seasons to conduct in vitro viral enrichment experiments. These experiments, that constitute the second part of this study, were performed to assess the impact of freshwater viruses carried by the Charante River on the dynamics and composition of coastal bacterial communities. With abundance ranging from 1.4 x 107 to 208 x I07 VLPml-1. viruses are the most abundant component among plankton microorganisms in surface waters of the Charente estuary. Thre temporal dynamics of this component reflects the indirect influence of temperature through the control of bacterial abundance,...
Tipo: Text
Palavras-chave: Richesse spécifique; Composition clonale; Enrichissement vital; Infection lyrique; Structure des communautés; MET; PPGE; Dynamique temporelle; Gradient de salinité; Estuaire; Bactérioplancton; Virioplancton; Species richness; Clonal composition; Viral enrichment; Lytic infection; Community structure; Diversity; TEM; PEGE; Temporal dynamic; Gradient; Salinity; Estuary; Bacterioplankton; Virioplankton.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-3071.pdf

Acclimation of the marine diatom Pseudo‐nitzschia australis to different salinity conditions: effects on growth, photosynthetic activity and domoic acid content
Provedor de dados: 5
Autores: Ayache, Nour; Hervé, Fabienne; Lundholm, Nina; Amzil, Zouher; Caruana, Amandine.
oxic Pseudo‐nitzschia australis strains isolated from French coastal waters were studied to investigate their capacity to adapt to different salinities. Their acclimation to different salinity conditions (10, 20, 30, 35 and 40) was studied on growth, photosynthetic capacity, cell biovolume and domoic acid (DA) content. The strains showed ability to acclimate to a salinity range from 20 to 40, with optimal growth rates between salinities 30 and 40. The highest cell biovolume was observed at the lowest salinity 20 and was associated with the lowest growth rate. Salinity did not affect the photosynthetic activity; Fv/Fm values and the pigment contents remained high with no significant difference among salinities. An enhanced production of zeaxanthin was,...
Tipo: Text
Palavras-chave: Acclimation; Climate change; Domoic acid; Pseudo-nitzschia australis; Physiology; Salinity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00585/69684/67552.pdf

SMOS salinity in the subtropical north Atlantic salinity maximum: 1. Comparison with Aquarius and in situ salinity
Provedor de dados: 5
Autores: Hernandez, Olga; Boutin, Jacqueline; Kolodziejczyk, Nicolas; Reverdin, Gilles; Martin, Nicolas; Gaillard, Fabienne; Reul, Nicolas; Vergely, J. L.
Sea surface salinity (SSS) measured from space by the Soil Moisture and Ocean Salinity (SMOS) mission is validated in the subtropical North Atlantic Ocean. 39 transects of ships of opportunity equipped with thermosalinographs (TSG) crossed that region from 2010 to 2012, providing a large database of ground truth SSS. SMOS SSS is also compared to Aquarius SSS. Large seasonal biases remain in SMOS and Aquarius SSS. In order to look at the capability of satellite SSS to monitor spatial variability, especially at scales less than 300 km (not monitored with the Argo network), we first apply a monthly bias correction derived from satellite SSS and In Situ Analysis System (ISAS) SSS differences averaged over the studied region. Ship SSS averaged over 25 km is...
Tipo: Text
Palavras-chave: SMOS; Salinity; Remote sensing; Subtropical North Atlantic.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00210/32150/34082.pdf

Cycle annuel de mesures physiques dans le milieu récepteur marin. Mouillage T.O. dans la grande rade de Toulon. Programme rejets urbains. Volet Méditerranée
Provedor de dados: 5
Autores: Thouvenin, Benedicte; Romana, L. A.; Loarer, Ronan; Joly, R.
This report is a compilation of current, wind, temperature and salinity measurements carried out during one and a half years, in the bay of Toulon, near the Sainte Marguerite sea outfall.
Tipo: Text
Palavras-chave: Mesures; Courants; Température; Salinité; Météorologie; Toulon; Méditerranée; Measurements; Currents; Temperature; Salinity; Meteorology; Toulon; Mediterranean sea.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00432/54351/58914.pdf

Effect of seawater salinity on pore-size distribution on a poly(styrene)-based HP20 resin and its adsorption of diarrhetic shellfish toxins
Provedor de dados: 5
Autores: Fan, Lin; Sun, Geng; Qiu, Jiangbing; Ma, Qimin; Hess, Philipp; Li, Aifeng.
In the present study, okadaic acid (OA) and dinophysistoxin-1 (DTX1) were spiked into artificial seawater at low, medium and high estuarine salinities (9‰, 13.5‰ and 27‰). Passive samplers (HP20 resin) used for solid phase adsorption toxin tracking (SPATT) technology were exposed in these seawaters for12-h periods. Adsorption curves well fitted a pseudo-secondary kinetics model. The highest initial sorption rates of both toxins occurred in the seawater of medium salinity, followed by seawater of low and high estuarine salinity. Pore volumes of micropores (&lt; 2 nm) and small mesopores (2 nm &lt; diameter &lt; 10 nm) of HP20 resin decreased after adsorption of toxins in seawater at high and low salinity but not in seawater at medium salinity, which...
Tipo: Text
Palavras-chave: Diarrhetic shellfish toxins (DST); Solid phase adsorption toxin tracking (SPATT); HP20 resin; Salinity; Pore-size distribution; Pseudo-secondary kinetics equation.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00226/33766/32192.pdf

Cyst-Theca Relationship and Phylogenetic Position of     Impagidinium caspienense     Incubated from Caspian Sea Surface Sediments: Relation to     Gonyaulax baltica     and Evidence for Heterospory within Gonyaulacoid Dinoflagellates
Provedor de dados: 5
Autores: Mertens, Kenneth; Takano, Yoshihito; Gu, Haifeng; Bagheri, Siamak; Pospelova, Vera; Pienkowski, Anna J.; Leroy, Suzanne A. G.; Matsuoka, Kazumi.
We investigate the cyst-theca relationship of Impagidinium caspienense. Through an incubation experiment, we succeeded in examining the motile stage. Additional molecular analysis of single-cyst PCR (LSU and SSU rDNA) reveal that the cyst is related to the species Gonyaulax baltica Ellegaard et al. (2002). The ability of this species to belong to two types of cyst-based genera (spiniferate and impagidinioid) suggests that environmental (particularly salinity) and not genetic factors explain the formation of both morphotypes by Gonyaulax baltica, which provides evidence for heterospory in this species. The affiliation to Gonyaulax baltica demonstrates that Impagidinium caspienense is not endemic to the Caspian Sea. The phylogenetic position of several other...
Tipo: Text
Palavras-chave: Ataxiodinium choane; Baltic Sea; Impagidinium pallidum; Pyxidinopsis psilata; Salinity; Spiniferites belerius; Spiniferites ramosus.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00382/49326/49703.pdf

L'adaptation ecophysiologique et sanitaire de l'ecrevisse turque Astacus leptodactylus a des milieux saumatres: Contribution a l'astaciculture
Provedor de dados: 5
Autores: Barbe, D; Lautier, J; Vernet, G; Vey, A.
This influence of salt media on different aspects of biological cycle and on most common pathogenic agents of Turkish freshwater crayfish Astacus leptodactylus is investigated survival and growing of juveniles O super(+) and intermediary individuals 1 super(+) are also studied. Total osmotic metabolism and reproduction, have been recorded. It appears that youngest individuals are particularly sensitive to low salinities (7 ppt.). Intermediary ones are more resistant nevertheless salinity does not improve neither survival nor growing. Copulation, laying and pleopod egg fixation are particularly affected by salt waters. The only promising application of salinity parameter on astaciculture could be whether prophylactic or curative treatment with concentrated...
Tipo: Text
Palavras-chave: Astacus leptodactylus; Malacostraca; Infectious diseases; Sexual reproduction; Growth; Mortality; Survival; Osmotic adaptations; Crayfish culture; Pathology; Metabolism; Salinity; Ecophysiology; Astaciculture; Régulation osmotique; Reproduction; Survie; Croissance; Pathologie; Ecophysiologie; Salinité; Astacus leptodactylus; Ecrevisse.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1185.pdf

Environmental controlling factors of copepod communities in the Gulf of Tunis (south western Mediterranean Sea)
Provedor de dados: 5
Autores: Ben Lamine, Yosra; Pringault, Olivier; Aissi, Mehdi; Ensibi, Cherif; Mahmoudi, Ezzeddine; Kefi, Ons Daly Yahia; Yahia, Mohamed Nejib Daly.
The copepod community structure and the distribution of the main groups of zooplankton were studied along an inshore-offshore gradient in the Gulf of Tunis during the rainy and dry seasons of 2007-2008. Hydrological parameters were also measured to assess the potential role of abiotic and biotic factors in the distribution of copepod species. The copepod community in the Gulf of Tunis comprises 86 species dominated by Paracalanus parvus, Clausocalanus lividus, Centropages kroyeri and Acartia clausi. Time had a greater influence than space (horizontal and vertical gradients) in shaping the copepod community structure with a significant influence of the seasons; winter (cold and rainy) resulted in hydrological conditions that were strongly different from...
Tipo: Text
Palavras-chave: Copepod diversity; Multivariate analysis; Temperature; Salinity; Top-down control; Competition.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00275/38670/73416.pdf

The effect of environmental salinity on the proteome of the sea bass (Dicentrarchus labrax L.)
Provedor de dados: 5
Autores: Ky, Chin Long; De Lorgeril, Julien; Hirtz, C; Sommerer, N; Rossignol, M; Bonhomme, F.
The European sea bass, Dicentrarchus labrax L., tolerates a range of salinities from freshwater to hyper-saline. To study differences in protein expression, fish were reared in both freshwater and seawater. After 3-month acclimation, gill and intestine epithelia were collected and the soluble protein extracted. In all, 362 spots were differentially expressed in the gills and intestines of fishes reared in seawater compared to those from freshwater. Fifty differential protein spots were excised from a colloidal Coomassie-stained gel. Nine separate protein spots were identified unambiguously by mass spectrometry and database searching. Among the six proteins over-expressed in gill cells in seawater, five were cytoskeleton proteins and one was the aromatase...
Tipo: Text
Palavras-chave: Two dimensional gel electrophoresis; Sea bass; Salinity; Real time PCR; MALDI TOF mass spectrometry.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3952.pdf

Mesoscale hydrological variability induced by northwesterly wind on the French continental shelf of the Bay of Biscay
Provedor de dados: 5
Autores: Puillat, I; Lazure, Pascal; Jegou, Anne-marie; Lampert, Luis; Miller, P.
On the French continental shelf of the Bay of Biscay the variability of the surface salinity distribution has been mainly investigated at the seasonal and inter-annual scales. Here, new mesoscale features such as lower-salinity lenses observed in model results are investigated by hydrological measurements acquired during 8 cruises (1997-2000). These lenses are 50-80 km wide and similar to 30 m thick and occur during westerly to northerly wind events that push offshore the less saline water of river Plumes. These water masses detached from the coast are replaced with upwelled saltier water at the coast, so coastal upwelling is often observed at the same time along Landes and southern Brittany coasts. We show that in addition to the influence of seasonal and...
Tipo: Text
Palavras-chave: River plume; Upwelling; Lens; Mesoscale; Salinity.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3958.pdf

Expédition OceanoScientific 2016-2017 : Etudes des mesures de température et de salinité de surface
Provedor de dados: 5
Autores: Reynaud, Thierry; Reverdin, Gilles; Metzl, Nicolas; Griboval, Yvan.
The OceanoScientific Programm was initiated in 2006 and yielded the creation of a specific equipment : the OSC-System. The OSC-System measures physical parameters at the air-sea interface including Sea Surface temperature and Salinity. An OSC-System was installed on board of the OceanoScientific Explorer Boogaloo sailing ship. A cruise around the world was initiated the 17/11/2016 and ended 02/06/2017 including 60 days south of 40°S. Sea Surface temperature and salinity collected along this cruise are discussed in this technical report.
Tipo: Text
Palavras-chave: Mesures; Température; Salinité; Surface; Oceanoscientific; Boogaloo; Antarctique; Temperature; Salinity; SST; SSS; Measurements; Antarctic.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58356/60914.pdf

A Lagrangian numerical investigation of the origins and fates of the salinity maximum water in the Atlantic
Provedor de dados: 5
Autores: Blanke, Bruno; Arhan, Michel; Lazar, A; Prevost, Gwenaelle.
The origins and fates of the Atlantic salinity maximum water (SMW), formed through excess evaporation in the tropics and subtropics of both hemispheres, are studied using monthly mean outputs of a numerical simulation of the world ocean climatological circulation. After defining formation domains from the surface salinity field and the vertical stratification, a Lagrangian technique is used to estimate the formation rates and main pathways in each hemisphere and the role of this water in the framework of the warm water return flow of the meridional overturning cell. Formation rates around 9 and 11 Sv are found in the Southern and Northern Hemispheres, respectively. While the export of the southern SMW from its formation area is realized by the western...
Tipo: Text
Palavras-chave: Atlantic ocean; Lagrangian method; Numerical simulation; Salinity; Sea water.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/2002/publication-769.pdf

Impact of temperature inversions on SST evolution in the South-Eastern Arabian Sea during the pre-summer monsoon season
Provedor de dados: 5
Autores: Durand, F; Shetye, Sr; Vialard, Jerome; Shankar, D; Shenoi, Ssc; Ethe, C; Madec, G.
Temperature inversions are known to occur in the near-surface ocean regime where salinity stratification is large enough to influence the density field. However, they have not been known as features that alter near-surface processes significantly to influence the sea surface temperature (SST). From the analysis of new observed datasets as well as of state-of-the-art numerical model outputs, this paper shows that heat trapped within a temperature inversion makes significant contribution to warming of the SST in the South-Eastern Arabian Sea during the pre-southwest monsoon season.
Tipo: Text
Palavras-chave: Mixed layer; Toga decade; Ocean; Variability; Salinity; Physics; Model; Onset; OGCM; Pool.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00203/31424/29815.pdf

Glutamate dehydrogenase and Na+-K+ ATPase expression and growth response of Litopenaeus vannamei to different salinities and dietary protein levels
Provedor de dados: 5
Autores: Li, Erchao; Arena, Leticia; Lizama, Gabriel; Gaxiola, Gabriela; Cuzon, Gerard; Rosas, Carlos; Chen, Liqiao; Van Wormhoudt, Alain.
Improvement in the osmoregulation capacity via nutritional supplies is vitally important in shrimp aquaculture. The effects of dietary protein levels on the osmoregulation capacity of the Pacific white shrimp (L. vannamei) were investigated. This involved an examination of growth performance, glutamate dehydrogenase (GDH) and Na+-K+ ATPase mRNA expression,, and GDH activity in muscles and gills. Three experimental diets were formulated, containing 25%, 40%, and 50% dietary protein, and fed to the shrimp at a salinity of 25. After 20 days, no significant difference was observed in weight gain, though GDH and Na+-K+ ATPase gene expression and GDH activity increased with higher dietary protein levels. Subsequently, shrimp fed diets with 25% and 50% dietary...
Tipo: Text
Palavras-chave: Litopenaeus vannamei; Gene expression; Glutamate dehydrogenase; Na+-K+ ATPase; Protein; Salinity.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00031/14261/11692.pdf

Modélisation de la résistance aux chocs de salinité des postlarves de Penaeus vannamei
Provedor de dados: 5
Autores: Aquacop, Aquacop; Le Moullac, Gilles; Damez, D.
The notion of penaeid shrimp postlarvae quality, which implies a survival potential, is still a subjective parameter. The zootechnical criteria and the visual observations are not sufficient to evaluate the physiological condition of the hatchery reared postlarvae. The resistance of postlarvae to salinity shocks is a representative criteria of their condition. The goal of this study is to present a non-linear regression model at 2 variables (size, salinity) for the P. vannamei postlarvae resistance to salinity shocks. Between the second and the twentieth day after metamorphosis; 5 salinity shocks (20, 15, 10, 5 and 20/00) were tested daily, each one with 50 postlarvae. Survival rates were recorded after 2 hrs. Concurrently, the postlarvae growth in the...
Tipo: Text
Palavras-chave: Salinity; Resistance; Growth; Postlarvae; Penaeus vannamei; Salinité; Résistance; Croissance; Postlarve; Penaeus vannamei.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-4430.pdf

Toxicite des Elements Metalliques Dissous pour les Larves d'Organismes Marins: Donnees Bibliographiques.
Provedor de dados: 5
Autores: Deslous-paoli, Jean-marc.
A bibliographic review has been made on the toxicity of ten metals for some marine larvae of commercial interest. We have classified, according to toxicity, organic salts of tin, mercury, silver, copper, zinc, nickel, lead, cadmium, chromium and manganese. Some synergistic effects of metals, temperature and salinity are described as well as the action of silt suspended in water.
Tipo: Text
Palavras-chave: Mollusca; Crustacea; Pollution effects; Bibliographies; Salinity; Temperature; Synergism; Heavy metals; Toxicity.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-1885.pdf

Improved Statistical Method for Quality Control of Hydrographic Observations
Provedor de dados: 5
Autores: Gourrion, Jerome; Szekely, Tanguy; Killick, Rachel; Owens, Breck; Reverdin, Gilles; Chapron, Bertrand.
Realistic ocean state prediction and its validation rely on the availability of high quality in situ observations. To detect data errors, adequate quality check procedures must be designed. This paper presents procedures that take advantage of the ever-growing observation databases that provide climatological knowledge of the ocean variability in the neighborhood of an observation location. Local validity intervals are used to estimate binarily whether the observed values are considered as good or erroneous. Whereas a classical approach estimates validity bounds from first- and second-order moments of the climatological parameter distribution, that is, mean and variance, this work proposes to infer them directly from minimum and maximum observed values....
Tipo: Text
Palavras-chave: Ocean; Climatology; Salinity; Temperature; Data quality control; Oceanic variability.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00628/74031/73359.pdf

Influence of Environmental Factors on the Paralytic Shellfish Toxin Content and Profile of Alexandrium catenella (Dinophyceae) Isolated from the Mediterranean Sea
Provedor de dados: 5
Autores: Laabir, Mohamed; Collos, Yves; Masseret, Estelle; Grzebyk, Daniel; Abadie, Eric; Savar, Veronique; Sibat, Manoella; Amzil, Zouher.
Laboratory experiments were designed to study the toxin content and profile of the Alexandrium catenella strain ACT03 (isolated from Thau Lagoon, French Mediterranean) in response to abiotic environmental factors under nutrient-replete conditions. This dinoflagellate can produce various paralytic shellfish toxins with concentrations ranging from 2.9 to 50.3 fmol/cell. The toxin profile was characterized by carbamate toxins (GTX3, GTX4 and GTX5) and N-sulfocarbamoyl toxins (C1, C2, C3 and C4). C2 dominated at 12-18 degrees C, but only for salinities ranging from 10 to 25 psu, whereas GTX5 became dominant at temperatures ranging from 21 to 30 degrees C at almost all salinities. There was no significant variation in the cellular toxin amount from 18 degrees C...
Tipo: Text
Palavras-chave: Alexandrium catenella; PSP toxins; Temperature; Salinity; Light.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25969/24056.pdf

Effect of salinity and temperature on the expression of genes involved in branchial ion transport processes in European sea bass
Provedor de dados: 5
Autores: Masroor, Waliullah; Farcy, Emilie; Blondeau-bidet, Eva; Venn, Alexander; Tambutté, Eric; Lorin-nebel, Catherine.
The responses of European sea bass to temperature increase and salinity decrease were investigated measuring mRNA expression levels of main genes involved in ion transport. Juvenile fish were pre-acclimated to seawater (SW) at 18 °C (temperate) or 24 °C (warm) for two weeks and then transferred for two weeks to either fresh water (FW) or SW at the respective temperature. Unlike temperate conditions, there is no change in Na+/K+-ATPase α1a (nka α1a) and Na+/H+ exchanger 3 (nhe3) mRNA expression following FW transfer in warm conditions. This is linked to the high expression of these genes in warm SW compared to temperate SW. Na+/Cl−-cotransporter (ncc2a) expression however is increased following FW transfer in temperate and warm conditions. Main transporters...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Ion transporter; Gill; MRNA expression; Thermal acclimation; Salinity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00514/62600/66958.pdf

Evolution de la salinité dans le bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Capouillez, Nadège.
We studied salinity in the basin of Marenes-Oléron starting from the data of the hydrological network of follow-up set up by IFREMER in the basin and starting from simulations with the assistance of an horizontal bidimensional model. The data enabled us to characterize the evolution of sali nit y at long and medium range and simulations allowed us to complete this board with the short-range variations, in particular with regard to the variabilily due to the cycle of tides. The long-term trend varies little and does not show any clear augmentation or reduction over the studied period. The saisonnality, on the other hand, presents more significant variations. The fluctuations of salinity due ta the neap tides and spring tides cycle and the cycle of tide...
Tipo: Text
Palavras-chave: Salinité; Bassin de Marennes-Oléron; Modèle 2D-H; Salinity; Basin of Marennes Oleron; Model 2D-H.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00443/55476/57005.pdf

Effects of temperature and salinity on the survival of Bonamia ostreae parasite infecting falt oyster Ostrea edulis in sea water
Provedor de dados: 5
Autores: Arzul, Isabelle; Bond, Celine; Gagnaire, Beatrice; Chollet, Bruno; Morga, Benjamin; Ferrand, Sylvie; Robert, Maeva; Renault, Tristan.
Bonamiosis due to the intrahaemocytic protistan parasite Bonamia ostreae is a European endemic disease affecting flat oysters Ostrea edulis. The parasite has been described in different ecosystems from estuaries to open sea and no clear correlations could be demonstrated between the development of the disease and environmental parameters such as temperature or salinity. The parasite life cycle, including its survival outside the host is not completely known. Nevertheless, the infection can be directly transmitted by cohabitation between infected and non infected oysters suggesting that the parasite does not need intermediate host to complete its cycle. In the present study, the impact of temperature and salinity on the survival of purified parasites...
Tipo: Text
Palavras-chave: Effects; Temperarature; Salinity; Bonamia ostreae; Parasite; Pathology; Flat oyster; Ostrea edulis; Oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3375.pdf

Surface functionalization determines behavior of nanoplastic solutions in model aquatic environments
Provedor de dados: 5
Autores: Tallec, Kevin; Blard, Océane; González-fernández, Carmen; Brotons, Guillaume; Berchel, Mathieu; Soudant, Philippe; Huvet, Arnaud; Paul-pont, Ika.
Plastic debris are classified as a function of their size and recently a new class was proposed, the nanoplastics. Nano-sized plastics have a much greater surface area to volume ratio than larger particles, which increases their reactivity in aquatic environment, making them potentially more toxic. Only little information is available about their behavior whereas it crucially influences their toxicity. Here, we used dynamic light scattering (DLS) to explore the influence of environmental factors (fresh- and saltwater, dissolved organic matter) on the behavior (surface charge and aggregation state) of three different nano-polystyrene beads (50 nm), with (i) no surface functionalization (plain), (ii) a carboxylic or (iii) an amine functionalization. Overall,...
Tipo: Text
Palavras-chave: Nanoplastic; Dynamic light scattering; Behavior; Aggregation; Salinity; Organic matter.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59652/62684.pdf

Satellite Salinity Observing System: Recent Discoveries and the Way Forward
Provedor de dados: 5
Autores: Vinogradova, Nadya; Lee, Tong; Boutin, Jacqueline; Drushka, Kyla; Fournier, Severine; Sabia, Roberto; Stammer, Detlef; Bayler, Eric; Reul, Nicolas; Gordon, Arnold; Melnichenko, Oleg; Li, Laifang; Hackert, Eric; Martin, Matthew; Kolodziejczyk, Nicolas; Hasson, Audrey; Brown, Shannon; Misra, Sidharth; Lindstrom, Eric.
Advances in L-band microwave satellite radiometry in the past decade, pioneered by ESA’s SMOS and NASA’s Aquarius and SMAP missions, have demonstrated an unprecedented capability to observe global sea surface salinity (SSS) from space. Measurements from these missions are the only means to probe the very-near surface salinity (top cm), providing a unique monitoring capability for the interfacial exchanges of water between the atmosphere and the upper-ocean, and delivering a wealth of information on various salinity processes in the ocean, linkages with the climate and water cycle, including land-sea connections, and providing constraints for ocean prediction models. The satellite SSS data are complimentary to the existing in situ systems such as Argo that...
Tipo: Text
Palavras-chave: Salinity; Remote sensing; Earth's observing systems; Future satellite missions; SMAP; SMOS; Aquarius.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00498/60985/64391.pdf

SMOS: The Challenging Sea Surface Salinity Measurement From Space
Provedor de dados: 5
Autores: Font, Jordi; Camps, Adriano; Borges, Andres; Martin-neira, Manuel; Boutin, Jacqueline; Reul, Nicolas; Kerr, Yann H.; Hahne, Achim; Mecklenburg, Susanne.
Soil Moisture and Ocean Salinity, European Space Agency, is the first satellite mission addressing the challenge of measuring sea surface salinity from space. It uses an L-band microwave interferometric radiometer with aperture synthesis (MIRAS) that generates brightness temperature images, from which both geophysical variables are computed. The retrieval of salinity requires very demanding performances of the instrument in terms of calibration and stability. This paper highlights the importance of ocean salinity for the Earth's water cycle and climate; provides a detailed description of the MIRAS instrument, its principles of operation, calibration, and image-reconstruction techniques; and presents the algorithmic approach implemented for the retrieval of...
Tipo: Text
Palavras-chave: Aperture synthesis; Imaging; Microwave radiometry; Remote sensing; Salinity.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00004/11482/8066.pdf

Variability of the Heat and Salt Budget in the Subtropical Southeastern Pacific Mixed Layer between 2004 and 2010: Spice Injection Mechanism
Provedor de dados: 5
Autores: Kolodziejczyk, Nicolas; Gaillard, Fabienne.
The mixed layer heat and salt budget in the southeastern subtropical Pacific are estimated using 7 years (2004-10) of Argo-profiling float data, surface fluxes, precipitation, surface velocity data, and wind observations and reanalysis. In this region, the mixed layer heat budget is characterized by a strong annual cycle mainly modulated by the shortwave radiation annual cycle. During the austral fall and winter, the shortwave radiation input minimum is overwhelmed by the heat loss mainly because of the latent heat flux. The mixed layer salt budget also presents a strong annual cycle with a minimum of salt content during the late austral winter. In contrast with the heat budget, the salt budget is mainly driven by the unresolved terms computed as the...
Tipo: Text
Palavras-chave: Mixed layer; Heat budgets; Fluxes; Salinity; In situ oceanic observations; Interannual variability; Seasonal cycle.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00155/26587/24722.pdf

Sea Surface Salinity and Temperature Budgets in the North Atlantic Subtropical Gyre during SPURS Experiment: August 2012-August 2013
Provedor de dados: 5
Autores: Sommer, Anna; Reverdin, Gilles; Kolodziejczyk, Nicolas; Boutin, Jacqueline.
Variability at large to meso-scale in sea surface salinity (SSS) and sea surface temperature (SST) is investigated in the subtropical North Atlantic Ocean during the Subtropical Atlantic Surface Salinity Experiment Strasse/SPURS in August 2012—August 2013. The products of the Soil Moisture and Ocean Salinity (SMOS) mission corrected from large scale systematic errors are tested and used to retrieve meso-scale salinity features, while OSTIA products, resolving meso-scale temperature features are used for SST. The comparison of corrected SMOS SSS data with drifter's in situ measurements from SPURS experiment shows a reasonable agreement, especially during winter time with RMS differences on the order of 0.15 pss (for 10 days, 75 km resolution SMOS product)....
Tipo: Text
Palavras-chave: Salinity; Temperature; Budget; Meso-scale; Advection; SMOS; SPURS.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00468/57933/60319.pdf

Evolution de la complexation des metaux (Ca, Mg, Cd, Pb et Cu) dans l''estuaire de la Seine
Provedor de dados: 5
Autores: Fischer, J; Wartel, M.
Interaction between metallic ions and dissolved organic matter can take major part in the biogeochemical cycle of metals in the aquatic environment. The authors point out copper behavior by the study of complexing capacity of surface and bottom waters. A systematic analysis of major elements in natural waters has allowed for a proposal of geographical distribution of metals.
Tipo: Text
Palavras-chave: River plumes; Dissolved organic matter; Chemical reactions; Salinity; Biogeochemical cycle; Metals; Ion association; Water properties.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1299.pdf

Etalonnage de capteurs de température et conductivité, et détermination des incertitudes de mesure associées
Provedor de dados: 5
Autores: Jacqueline, Franck.
The first aim of this experimentation is to calculate uncertainty of measurement fo Ysi 6560 and wTw LF 197's sensors. in a second time we shall try to quantify the influence of the choice of the calibration point for the quality of the measurements, in function of the environment measured.
Tipo: Text
Palavras-chave: Incertitude de mesure; Calibrage; Température; Salinité; Conductivité.; Uncertainity; Gauging; Temperature; Salinity; Conductivity.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00175/28618/27046.pdf

Hydrologie de la Mediterranée Occidentale au nord du 42e parallèle en automne 1958 (Campagne du navire « Président-Théodore-Tissier » du 27 septembre au 18 octobre 1958)
Provedor de dados: 5
Autores: Furnestin, Jean; Allain, Charles.
Tipo: Text
Palavras-chave: Mediterranean sea; Temperature; Salinity; Hydrology.
Ano: 1962
URL: http://archimer.ifremer.fr/doc/00127/23788/21698.pdf

Seasonal and interannual variations (1996-2000) of the coastal waters east of the Rhone river mouth as indicated by the SORCOM series
Provedor de dados: 5
Autores: Younes, Wan; Bensoussan, N; Romano, Jc; Arlhac, D; Lafont, Maxime.
Between 1996 and 2000, 79 cruises have been achieved following always the same transect between Marseilles and the Rhone river's mouth. While cruising, salinity, temperature and fluorescence of surface waters (1.5 m) were recorded every minute, in association with precise GPS position. The whole set of data. (i.e. 128 measured points per cruise) constitutes the Sorcom series whose synthetic results ate presented here. Despite the high spatial and temporal. variability encountered between two successive cruises, the regularity and duration of the sampling strategy permitted to define coherent spatial zonation and temporal evolutions. In the Cape Couronne vicinity the dynamic of the eastern extension of the dilution plume clearly changes. Westward, waters...
Tipo: Text
Palavras-chave: Rhône; Panache de dilution; Observation à long terme; Fluorescence; Salinité; Rhone river; Dilution plume; Long term observation; Fluorescence; Salinity.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43260/42991.pdf

Physiological basis of interactive responses to temperature and salinity in coastal marine invertebrate: Implications for responses to warming
Provedor de dados: 5
Autores: Torres, Gabriela; Charmantier, Guy; Wilcockson, David; Harzsch, Steffen; Giménez, Luis.
Developing physiological mechanistic models to predict species’ responses to climate‐driven environmental variables remains a key endeavor in ecology. Such approaches are challenging, because they require linking physiological processes with fitness and contraction or expansion in species’ distributions. We explore those links for coastal marine species, occurring in regions of freshwater influence (ROFIs) and exposed to changes in temperature and salinity. First, we evaluated the effect of temperature on hemolymph osmolality and on the expression of genes relevant for osmoregulation in larvae of the shore crab Carcinus maenas. We then discuss and develop a hypothetical model linking osmoregulation, fitness, and species expansion/contraction toward or away...
Tipo: Text
Palavras-chave: Carcinus maenas; Climate change; Coastal zone; Larva; MRNA expression; Multiple stressors; Osmoregulation; Salinity; Temperature.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00692/80408/83516.pdf

Glacial hydrologic conditions in the Black Sea reconstructed using geochemical pore water profiles
Provedor de dados: 5
Autores: Soulet, Guillaume; Delaygue, G.; Vallet-coulomb, C.; Boettcher, M. E.; Sonzogni, C.; Lericolais, Gilles; Bard, E.
Chloride and delta O-18 compositions of interstitial water extracted from a long sediment core retrieved from the NW coast of the Black Sea allowed us to constrain the main hydrologic changes of the Back Sea during the Late Pleistocene and Holocene. Prior to its reconnection with the Mediterranean Sea (through the Marmara Sea) at approximately 9000 calendar yr before present (9 ka cal BP), the Black Sea has evolved as a fresh to brackish water lake. At the time of reconnection, hydrologic changes were drastic. Bottom water salinities changed from a few psu (practical salinity unit) to similar to 22 psu. Since solutes in the interstitial water column within sediments are advected and diffused the measured concentrations do not reflect those of past bottom...
Tipo: Text
Palavras-chave: Black Sea; Interstitial water; Salinity; Water isotopes; Advection/diffusion modelling; Deglaciation.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12239/9798.pdf

Experimental shift of diet and DIC stable carbon isotopes: Influence on shell delta C-13 values in the Manila clam Ruditapes philippinarum
Provedor de dados: 5
Autores: Poulain, C.; Lorrain, Anne; Mas, R.; Gillikin, D. P.; Dehairs, F.; Robert, Rene; Paulet, Yves-marie.
The influences of diet and seawater dissolved inorganic carbon (DIC) on the carbon isotope composition of shell aragonite (Cinched in the Manila clam Ruditapes philippinarum reared under laboratory conditions were investigated. Clams were exposed to two successive negative carbon isotope shifts: a first shift in diet (delta C-13(phytoplankton)) and a second shift, 35 days later, in DIC (delta C-13(DIC)). Both successive shifts induced a decrease in delta C-13(shell). These results are the first to experimentally confirm an incorporation of respired carbon derived from food and carbon from DIC into shell carbonate of adult bivalves. Skeletal delta C-13 responded to changes in the delta C-13 of both diet and DIC in less than 7 days. Consequently, proxies...
Tipo: Text
Palavras-chave: Delta C-13(shell); DIC; Salinity; Metabolic carbon; Ruditapes philippinarum; Estuarine water; Proxy.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11443/8001.pdf

Argo Data 1999–2019: Two Million Temperature-Salinity Profiles and Subsurface Velocity Observations From a Global Array of Profiling Floats
Provedor de dados: 5
Autores: Wong, Annie P. S.; Wijffels, Susan E.; Riser, Stephen C.; Pouliquen, Sylvie; Hosoda, Shigeki; Roemmich, Dean; Gilson, John; Johnson, Gregory C.; Martini, Kim; Murphy, David J.; Scanderbeg, Megan; Bhaskar, T. V. S. Udaya; Buck, Justin J. H.; Merceur, Frederic; Carval, Thierry; Maze, Guillaume; Cabanes, Cécile; André, Xavier; Poffa, Noe; Yashayaev, Igor; Barker, Paul M.; Guinehut, Stéphanie; Belbéoch, Mathieu; Ignaszewski, Mark; Baringer, Molly O'Neil; Schmid, Claudia; Lyman, John M.; Mctaggart, Kristene E.; Purkey, Sarah G.; Zilberman, Nathalie; Alkire, Matthew B.; Swift, Dana; Owens, W. Brechner; Jayne, Steven R.; Hersh, Cora; Robbins, Pelle; West-mack, Deb; Bahr, Frank; Yoshida, Sachiko; Sutton, Philip J. H.; Cancouët, Romain; Coatanoan, Christine; Dobbler, Delphine; Juan, Andrea Garcia; Gourrion, Jerome; Kolodziejczyk, Nicolas; Bernard, Vincent; Bourlès, Bernard; Claustre, Hervé; D'Ortenzio, Fabrizio; Le Reste, Serge; Le Traon, Pierre-yves; Rannou, Jean Philippe; Saout-grit, Carole; Speich, Sabrina; Thierry, Virginie; Verbrugge, Nathalie; Angel-benavides, Ingrid M.; Klein, Birgit; Notarstefano, Giulio; Poulain, Pierre-marie; Vélez-belchí, Pedro; Suga, Toshio; Ando, Kentaro; Iwasaska, Naoto; Kobayashi, Taiyo; Masuda, Shuhei; Oka, Eitarou; Sato, Kanako; Nakamura, Tomoaki; Sato, Katsunari; Takatsuki, Yasushi; Yoshida, Takashi; Cowley, Rebecca; Lovell, Jenny L.; Oke, Peter R.; Van Wijk, Esmee M.; Carse, Fiona; Donnelly, Matthew; Gould, W. John; Gowers, Katie; King, Brian A.; Loch, Stephen G.; Mowat, Mary; Turton, Jon; Rama Rao, E. Pattabhi; Ravichandran, M.; Freeland, Howard J.; Gaboury, Isabelle; Gilbert, Denis; Greenan, Blair J. W.; Ouellet, Mathieu; Ross, Tetjana; Tran, Anh; Dong, Mingmei; Liu, Zenghong; Xu, Jianping; Kang, Kiryong; Jo, Hyeongjun; Kim, Sung-dae; Park, Hyuk-min.
In the past two decades, the Argo Program has collected, processed, and distributed over two million vertical profiles of temperature and salinity from the upper two kilometers of the global ocean. A similar number of subsurface velocity observations near 1,000 dbar have also been collected. This paper recounts the history of the global Argo Program, from its aspiration arising out of the World Ocean Circulation Experiment, to the development and implementation of its instrumentation and telecommunication systems, and the various technical problems encountered. We describe the Argo data system and its quality control procedures, and the gradual changes in the vertical resolution and spatial coverage of Argo data from 1999 to 2019. The accuracies of the...
Tipo: Text
Palavras-chave: Global; Ocean; Pressure; Temperature; Salinity; Argo; Profiling; Floats.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76377/77385.pdf

Contribution of the Amazon River Discharge to Regional Sea Level in the Tropical Atlantic Ocean
Provedor de dados: 5
Autores: Giffard, Pierrick; Llovel, William; Jouanno, Julien; Morvan, Guillaume; Decharme, Bertrand.
Tipo: Text
Palavras-chave: Sea level; Amazon River; River plume; Salinity; Model; NEMO; Tropical Atlantic.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70268/68327.pdf

First record of Grapsus grapsus (Linnaeus, 1758) (Brachyura: Decapoda: Grapsidae) in freshwater habitat
Provedor de dados: 5
Autores: Arai, Tammy Iwasa; Brandao Costa, Manoela; Freire, Andrea Santarosa.
The sally lightfoot crab, Grapsus grapsus (Linnaeus, 1758), has been recorded from the oceanic islands off Brazil, as well as from the Caribbean, in coastal rocky shores in the Eastern Pacific, and in Galapagos. We report the first observation of G. grapsus in freshwater habitat, registered in a stream at Trindade Island, Brazil.
Tipo: Text
Palavras-chave: Trindade Island; Grapsoidea; Salinity; Inland; South Atlantic Ocean.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00597/70913/69148.pdf

The emissivity of foam-covered water surface at L-band: Theoretical modeling and experimental results from the frog 2003 field experiment
Provedor de dados: 5
Autores: Camps, A; Vall-ilossera, M; Villarino, R; Reul, Nicolas; Chapron, Bertrand; Corbella, I; Duffo, N; Torres, F; Miranda, Jj; Sabia, R; Monerris, A; Rodriguez, R.
Sea surface salinity can be measured by microwave radiometry at L-band (1400-1427 MHz). This frequency is a compromise between sensitivity to the salinity, small atmospheric perturbation, and reasonable pixel resolution. The description of the ocean emission depends on two main factors: 1) the sea water permittivity, which is a function of salinity, temperature, and frequency, and 2) the sea surface state, which depends on the wind-induced wave spectrum, swell, and rain-induced roughness spectrum, and by the foam coverage and its emissivity. This study presents a simplified two-layer emission model for foam-covered water and the results of a controlled experiment to measure the foam emissivity as a function of salinity, foam thickness, incidence angle, and...
Tipo: Text
Palavras-chave: Brightness temperature; Emission; Foam; Microwave radiometry; Salinity; Sea.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00000/10940/9268.pdf

Interannual surface salinity in Northwest Atlantic shelf
Provedor de dados: 5
Autores: Grodsky, Semyon A.; Reul, Nicolas; Chapron, Bertrand; Carton, James A.; Bryan, Frank O.
Sea surface salinity (SSS) from the Aquarius and SMOS satellite missions displays a steady increase of ~1psu over the entire northwestern Atlantic shelf south of Nova Scotia during the 2011-2015. Put in the context of longer ocean profile data the results suggest that mixed layer salinity and temperature north of the Gulf Stream experience positively correlated shelf-wide interannual oscillations (1psu/2degC). Salty and warm events occur coincident with anomalous easterly-southeasterly winds and Ekman transport counteracting the mean southwestward shelf currents. They are coincident with the weakening of both branches of the Scotian Shelf Current (SSC), but only moderately correlate with shifts of the Gulf Stream North Wall. This suggests that salt...
Tipo: Text
Palavras-chave: Salinity; Interannual; Satellite.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00376/48736/49100.pdf

Salinity changes along the upper limb of the Atlantic thermohaline circulation - art. no. L06609
Provedor de dados: 5
Autores: Blanke, Bruno; Arhan, Michel; Speich, Sabrina.
Lagrangian analyses of a global ocean circulation model quantify the salinity changes experienced by the warm limb of the thermohaline circulation during the northward flow to the Atlantic deep convection regions. 6 Sv out of the estimated 10-Sv transfer from 45 degrees S to 47 degrees N flow through regions of prevailing surface evaporation: the southern and northern formation regions of Salinity Maximum Water and the Gulf of Cadiz/Mediterranean Sea domain. The remaining transport gains salinity through mixing with adjacent waters. As much as 6 Sv flow through the low-salinity surface mixed layer at the latitudes of the ITCZ whose effect annihilates that of the southern region of Salinity Maximum Water. Most of the salinity increase corresponds to the...
Tipo: Text
Palavras-chave: Salinity; Atlantic deep convection zones; Upper limb; Thermohaline circulation; Ocean circulation model.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1213.pdf

Variability in the ICES/NAFO region between 1950 and 2009: observations from the ICES Report on Ocean Climate
Provedor de dados: 5
Autores: Hughes, Sarah L.; Holliday, N. Penny; Gaillard, Fabienne.
The ICES Report on Ocean Climate presents the latest information on the status and trends of sea temperature and salinity in the North Atlantic and Nordic Seas. It is the main product of the ICES Working Group on Oceanic Hydrography, published annually. Bringing together multiple time-series from across the ICES and NAFO regions offers insight into the concurrent spatial and temporal trends in ocean temperature and salinity. This paper presents an overview of the physical variability in the North Atlantic Ocean at decadal and longer time-scales and reviews the current state of understanding of the causes and mechanisms of this variability. Between the 1960s and the 1990s, the North Atlantic Oscillation (NAO) index increased from a persistent negative phase...
Tipo: Text
Palavras-chave: Circulation; Multidecadal variability; North Atlantic; Salinity; Temperature.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00087/19854/17513.pdf

The upper Bay of Bengal salinity structure in a high-resolution model
Provedor de dados: 5
Autores: Benshila, Rachid; Durand, Frederic; Masson, Sebastien; Bourdalle-badie, Romain; De Boyer Montegut, Clement; Papa, Fabrice; Madec,.
Salinity in the Bay of Bengal is highly heterogeneous, with extremely fresh waters found at the surface in the Northern part of the basin, and saltier waters at subsurface as well as to the south. This paper investigates the seasonal structure of sea surface salinity of the Bay in a regional high-resolution model forced by ERA-Interim reanalysis and various precipitation products. Surface circulation is believed to drive the spreading of northern Bay of Bengal fresh waters to the rest of the Indian Ocean. We first present a series of experiments to infer the sensitivity of modeled circulation to various numerical choices. Surface circulation is found to be sensitive to the horizontal resolution of the model, with the 1/12° version appearing much more...
Tipo: Text
Palavras-chave: Salinity; Bay of Bengal; Export of fresh water plume; High resolution ocean modeling.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00168/27925/26199.pdf

Osmoregulation in larvae and juveniles of two recently separated Macrobrachium species: Expression patterns of ion transporter genes
Provedor de dados: 5
Autores: Boudour-boucheker, Nesrine; Boulo, Viviane; Charmantier-daures, Mireille; Anger, Klaus; Charmantier, Guy; Lorin-nebel, Catherine.
In this comparative study, osmoregulatory mechanisms were analyzed in two closely related species of palaemonid shrimp from Brazil, Macrobrachium pantanalense and Macrobrachium amazonicum. A previous investigation showed that all postembryonic stages of M. pantanalense from inland waters of the Pantanal are able to hyper-osmoregulate in fresh water, while this species was not able to hypo-osmoregulate at high salinities. In M. amazonicum originating from the Amazon estuary, in contrast, all stages are able to hypo-osmoregulate, but only first-stage larvae, late juveniles and adults are able to hyper-osmoregulate in fresh water. The underlying molecular mechanisms of these physiological differences have not been known. We therefore investigated the...
Tipo: Text
Palavras-chave: Salinity; Crustaceans; Branchial chamber; NHE3 transporter; V-type H+-ATPase; Na+/K+-ATPase.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00313/42427/41899.pdf

Mass transfer efficiency of a vacuum airlift-Application to water recycling in aquaculture systems
Provedor de dados: 5
Autores: Barrut, Bertrand; Blancheton, Jean-paul; Champagne, Jean-yves; Grasmick, Alain.
In aquaculture, oxygen transfer and carbon dioxide stripping are the first limiting factors to fish rearing intensification. In this study we measured the O-2 and CO2 mass transfer coefficient (K(L)a) for a vacuum airlift in fresh (&lt;1% salinity) and sea water (35 parts per thousand salinity) recirculating aquaculture systems (RAS). The airlift was composed of two concentric tubes: an inner riser tube and an external downcomer tube and can be adjusted at three different heights: 2,4 or 6 m. Several types of air injectors were tested, delivering different sizes of bubble swarms depending on their porosity and functioning conditions (low or high injection pressure), with air flows varying from 0 to 80 L min(-1). Experiments were also carried out at...
Tipo: Text
Palavras-chave: Mass transfer; Airlift; Vacuum; Aquaculture; RAS; Aeration; Degasification; Salinity.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00072/18324/16001.pdf

Hydrologie de la Mediterranée Occidentale au nord du 42e parallèle en automne 1958 (Campagne du navire « Président-Théodore-Tissier » du 27 septembre au 18 octobre 1958)
Provedor de dados: 5
Autores: Furnestin, Jean; Allain, Charles.
Tipo: Text
Palavras-chave: Mediterranean sea; Temperature; Salinity; Hydrology.
Ano: 1962
URL: http://archimer.ifremer.fr/doc/1962/publication-2232.pdf

Analysis of salinity measurements near islands on the French continental shelf of the Bay of Biscay
Provedor de dados: 5
Autores: Lazure, Pascal; Jegou, Anne-marie; Kerdreux, Michel.
The Bay of Biscay is characterised by large fresh water inputs from two major rivers, the Loire and the Gironde, with a mean discharge of about 900 m(3)/s. To describe the spatial and temporal variability of the Loire and Gironde plumes, continuous salinity measurements were made at 4 locations on French coastal islands over periods lasting at least two years. These islands are located at a distance from the large local gradients linked to local inputs. Whereas sea surface salinity in the centre of the Bay of Biscay is 35.6, salinities at the coast vary between about 35 in summer to occasionally less than 30 in late winter or in spring. Minimum salinities do not occur at the same time along the coast, indicating a strong spatial gradient. Near the Loire...
Tipo: Text
Palavras-chave: Bay of Biscay; Continental shelf; River plume; Seasonal variability; Salinity; Hydrology.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3957.pdf

Combined effect of temperature and salinity on osmoregulation of juvenile and subadult Penaeus stylirostris
Provedor de dados: 5
Autores: Lemaire, Pierrette; Bernard, Eric; Martinez-paz, J; Chim, Liet.
In New Caledonia, the "syndrome 93," which results in mass mortalities of farmed shrimp Penaeus stylirostris, occurs during the transitional and the cold seasons. The transitional season is characterized by an important fall in the average water temperature from 28 to 19 degreesC in 2 weeks. Besides this marked temperature fall, there are also nyctemeral temperature changes of up to 7 degreesC in 12 h. The cold season is characterized by an average water temperature of 19 degreesC with extreme lows of 14 degreesC. The objective of this study was to determine the effect of temperature and its variations on the osmoregulatory capacity of juvenile (7-10 g average weight) and subadult (25 g average weight) shrimps subjected to conditions of different salinity....
Tipo: Text
Palavras-chave: Temperature; Salinity; Osmoregulatory capacity; Penaeus stylirostris; Shrimp.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-395.pdf

Ocean Salinity Stratification (OSS)
Provedor de dados: 5
Autores: Maes, Christophe; O'Kane, Terence.
This dataset is composed by the climatological seasonal field of the Ocean Salinity Stratification as defined from the Brunt-Vaisala frequency limited to the upper 300 m depth. The details are given in Maes, C., and T. J. O’Kane (2014), Seasonal variations of the upper ocean salinity stratification in the Tropics, J. Geophys. Res. Oceans, 119, 1706–1722, doi:10.1002/2013JC009366.
Tipo: Dataset
Palavras-chave: Salinity; Oceanography; Stratification.
Ano: 2014
URL: http://dx.doi.org/10.17882/41101

Stress factors resulting from the Arctic vernal sea-ice melt : Impact on the viability of bacterial communities associated with sympagic algae
Provedor de dados: 5
Autores: Amiraux, Rémi; Burot, Christopher; Bonin, Patricia; Massé, Guillaume; Guasco, Sophie; Babin, Marcel; Vaultier, Frédéric; Rontani, Jean-françois.
During sea-ice melt in the Arctic, primary production by sympagic (sea-ice) algae can be exported efficiently to the seabed if sinking rates are rapid and activities of associated heterotrophic bacteria are limited. Salinity stress due to melting ice has been suggested to account for such low bacterial activity. We further tested this hypothesis by analyzing samples of sea ice and sinking particles collected from May 18 to June 29, 2016, in western Baffin Bay as part of the Green Edge project. We applied a method not previously used in polar regions—quantitative PCR coupled to the propidium monoazide DNA-binding method—to evaluate the viability of bacteria associated with sympagic and sinking algae. We also measured cis-trans isomerase activity, known to...
Tipo: Text
Palavras-chave: Bacteria; Sea ice; Sympagic algae; Ice biota; Viability; Stress factors; Salinity; Bactericidal free fatty acids; Carbon export.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00681/79329/81840.pdf

Température et salinité dans l'Aber Benoît et l'Aber Wrach été 1991, rapport de mesures
Provedor de dados: 5
Autores: Merceron, Michel; Gaffet, Jean-dominique.
This report displays the data of temperature and salinity from the records performed in the Aber Wrach and Aber Benoît estuaries during the summer 1991. This work was decided after a massive oyster kill in the Aber Benoît estuary.
Tipo: Text
Palavras-chave: Brittany; Estuary; Salinity; Temperature; Bretagne; Estuaire; Salinité; Température.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/rapport-2659.pdf

Water delivery capacity of a vacuum airlift – Application to water recycling in aquaculture systems
Provedor de dados: 5
Autores: Barrut, Bertrand; Blancheton, Jean-paul; Champagne, Jean-yves; Grasmick, Alain.
A study was undertaken to measure the water flow (Qw) delivered by a vacuum airlift designed for recirculating aquaculture systems (RAS) in fresh (&lt;1‰ of salinity) and sea water (35‰ of salinity). The vacuum airlift consists of two concentric tubes connected at their top to a depression chamber. The water rises in the inner tube as a result of air being injected in its lower section and flows back through the external downcomer tube. The vacuum airlift was adjusted at three different lengths: 2, 4 or 6 m and water discharge could be lifted from 0 to 30 cm. Air flow rate (Qg) varied from 0 to 80 L min−1. Different types of air injectors were tested, delivering different bubble sizes (0.1–5 mm) depending on porosity and functioning at low or high...
Tipo: Text
Palavras-chave: Water circulation; Airlift; Vacuum; Aquaculture; RAS; Salinity.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00073/18457/16005.pdf

Meridional shifts in the marine ITCZ and the tropical hydrologic cycle over the last three glacial cycles
Provedor de dados: 5
Autores: Schmidt, Matthew W.; Spero, Howard J.
Paleoproxy studies show a strong correlation between tropical climate and high-latitude temperature variability recorded in the Greenland ice cores over the last glacial cycle. In particular, abrupt cooling events in the Greenland Ice Sheet Project II delta(18)O ice record appear synchronous with a southward migration of the Intertropical Convergence Zone (ITCZ) in the Atlantic, a weakening of the Indian and East Asian monsoon systems, and a strengthening of the South American monsoon system. Because this high-to-low-latitude climate teleconnection significantly alters the tropical hydrologic cycle around the globe, it plays a critical role in regulating global climate on glacial-interglacial time scales. We compare delta(18)O(seawater) reconstructions (a...
Tipo: Text
Palavras-chave: Hydrologic cycle; Mg/Ca; Quaternary; Tropics; Salinity; ITCZ.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00228/33877/32255.pdf

On the Future of Argo: A Global, Full-Depth, Multi-Disciplinary Array
Provedor de dados: 5
Autores: Roemmich, Dean; Alford, Matthew H.; Claustre, Hervé; Johnson, Kenneth; King, Brian; Moum, James; Oke, Peter; Owens, W. Brechner; Pouliquen, Sylvie; Purkey, Sarah; Scanderbeg, Megan; Suga, Toshio; Wijffels, Susan; Zilberman, Nathalie; Bakker, Dorothee; Baringer, Molly; Belbeoch, Mathieu; Bittig, Henry C.; Boss, Emmanuel; Calil, Paulo; Carse, Fiona; Carval, Thierry; Chai, Fei; Conchubhair, Diarmuid Ó.; D’ortenzio, Fabrizio; Dall’olmo, Giorgio; Desbruyeres, Damien; Fennel, Katja; Fer, Ilker; Ferrari, Raffaele; Forget, Gael; Freeland, Howard; Fujiki, Tetsuichi; Gehlen, Marion; Greenan, Blair; Hallberg, Robert; Hibiya, Toshiyuki; Hosoda, Shigeki; Jayne, Steven; Jochum, Markus; Johnson, Gregory C.; Kang, Kiryong; Kolodziejczyk, Nicolas; Körtzinger, Arne; Traon, Pierre-yves Le; Lenn, Yueng-djern; Maze, Guillaume; Mork, Kjell Arne; Morris, Tamaryn; Nagai, Takeyoshi; Nash, Jonathan; Garabato, Alberto Naveira; Olsen, Are; Pattabhi, Rama Rao; Prakash, Satya; Riser, Stephen; Schmechtig, Catherine; Schmid, Claudia; Shroyer, Emily; Sterl, Andreas; Sutton, Philip; Talley, Lynne; Tanhua, Toste; Thierry, Virginie; Thomalla, Sandy; Toole, John; Troisi, Ariel; Trull, Thomas W.; Turton, Jon; Velez-belchi, Pedro Joaquin; Walczowski, Waldemar; Wang, Haili; Wanninkhof, Rik; Waterhouse, Amy F.; Waterman, Stephanie; Watson, Andrew; Wilson, Cara; Wong, Annie P. S.; Xu, Jianping; Yasuda, Ichiro.
The Argo Program has been implemented and sustained for almost two decades, as a global array of about 4000 profiling floats. Argo provides continuous observations of ocean temperature and salinity versus pressure, from the sea surface to 2000 dbar. The successful installation of the Argo array and its innovative data management system arose opportunistically from the combination of great scientific need and technological innovation. Through the data system, Argo provides fundamental physical observations with broad societally-valuable applications, built on the cost-efficient and robust technologies of autonomous profiling floats. Following recent advances in platform and sensor technologies, even greater opportunity exists now than 20 years ago to (i)...
Tipo: Text
Palavras-chave: Argo; Floats; Global; Ocean; Warming; Circulation; Temperature; Salinity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62043/66192.pdf

On the seasonal variations of salinity of the tropical Atlantic mixed layer
Provedor de dados: 5
Autores: Camara, I.; Kolodziejczyk, Nicolas; Mignot, Juliette; Lazar, Alban; Gaye, Amadou T.
The physical processes controlling the mixed layer salinity (MLS) seasonal budget in the tropical Atlantic Ocean are investigated using a regional configuration of an ocean general circulation model. The analysis reveals that the MLS cycle is generally weak in comparison of individual physical processes entering in the budget because of strong compensation. In evaporative regions, around the surface salinity maxima, the ocean acts to freshen the mixed layer against the action of evaporation. Poleward of the southern SSS maxima, the freshening is ensured by geostrophic advection, the vertical salinity diffusion and, during winter, a dominant contribution of the convective entrainment. On the equatorward flanks of the SSS maxima, Ekman transport mainly...
Tipo: Text
Palavras-chave: Salinity; Seasonal variation; Tropical Atlantic; Vertical mixing.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00624/73563/73200.pdf

Accuracy and long-term stability assessment of inductive conductivity cell measurements on Argo floats
Provedor de dados: 5
Autores: Nezlin, Nikolay P.; Dever, Mathieu; Halverson, Mark; Leconte, Jean-michel; Maze, Guillaume; Richards, Clark; Shkvorets, Igor; Zhang, Rui; Johnson, Greg.
This study demonstrates the long-term stability of salinity measurements from Argo floats equipped with inductive conductivity cells, which have extended float lifetimes as compared to electrode-type cells. New Argo float sensor payloads must meet the demands of the Argo governance committees before they are implemented globally. Currently, the use of CTDs with inductive cells designed and manufactured by RBR Ltd., has been approved as a Global Argo Pilot. One requirement for new sensors is to demonstrate stable measurements over the lifetime of a float. To demonstrate this, data from four Argo floats in the western Pacific Ocean equipped with the RBRargo CTD sensor package are analyzed using the same Owens-Wong-Cabanes (OWC) method and reference datasets...
Tipo: Text
Palavras-chave: Pacific Ocean; Salinity; Instrumentation/sensors; Profilers; Oceanic; Quality assurance/control.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76568/77698.pdf

Errors in SMOS Sea Surface Salinity and their dependency on a priori wind speed
Provedor de dados: 5
Autores: Yin, Xiaobin; Boutin, Jacqueline; Martin, Nicolas; Spurgeon, Paul; Vergely, Jean-luc; Gaillard, Fabienne.
The wind speed (WS) provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) is used to initialize the retrieval process of WS and Sea Surface Salinity (SSS) obtained by the Soil Moisture and Ocean Salinity (SMOS) mission. This process compensates for the lack of onboard instrument providing a measure of ocean surface WS independent of the L-band radiometer measurements. The SMOS-retrieved WS in the center of the swath (± 300 km) is adjusted regarding to its a priori estimate. The quality of the SMOS-retrieved SSS (SSSSMOS) is better at the center of the swath than at the edge of the swatch because the larger number of brightness temperature measurements available at the center of the swath reduces the effects of noise and because the...
Tipo: Text
Palavras-chave: SMOS; SSMIS; ECMWF; Wind speed; Salinity.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00158/26970/25261.pdf

Advances in measuring ocean salinity with an optical sensor
Provedor de dados: 5
Autores: Le Menn, Marc; De La Tocnaye, J. L. De Bougrenet; Grosso, P.; Delauney, Laurent; Podeur, Christian; Brault, P.; Guillerme, O.
Absolute salinity measurement of seawater has become a key issue in thermodynamic models of the oceans. One of the most direct ways is to measure the seawater refractive index which is related to density and can therefore be related to the absolute salinity. Recent advances in high resolution position sensitive devices enable us to take advantage of small beam deviation measurements using refractometers. This paper assesses the advantages of such technology with respect to the current state-of-the-art technology. In particular, we present the resolution dependence on refractive index variations and derive the limits of such a solution for designing seawater sensors well suited for coastal and deep-sea applications. Particular attention has been paid to...
Tipo: Text
Palavras-chave: Refractive index; Seawater; Density; Salinity; Refractometer.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00052/16295/13899.pdf

Interannual variability of zooplankton in the Dumont d'Urville sea (139 degrees E-146 degrees E), east Antarctica, 2004-2008
Provedor de dados: 5
Autores: Swadling, Kerrie M.; Penot, Florian; Vallet, Carole; Rouyer, Armelle; Gasparini, Stephane; Mousseau, Laure; Smith, Martina; Goffart, Anne; Koubbi, Philippe.
Spatial and temporal variability of zooplankton was studied during five summers (2004-2008) in the Dumont d'Urville Sea, east Antarctica. The species recorded, based on the catch of a 500 mm-mesh Bongo net, were typical of southern continental shelf communities in Antarctica, including Euphausia crystallorophias, polychaetes, pteropods and biomass-dominant copepods. There was a strong degree of temporal variation in abundance, possibly related to the thickness and extent of the sea ice cover during each spring prior to the surveys. Total mean abundance was highly variable between years, with a minimum of 961 ind. 1000m(-3) in 2004 (range 65-3407 ind. 1000 m(-3)) and a maximum of 15,627 ind. 1000 m(-3) in 2005 (range 5109-33,869 ind. 1000 m(-3)). Spatially,...
Tipo: Text
Palavras-chave: Salinity; Temperature; Sea ice; Zooplankton-environment relationships; Mertz glacier.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00230/34123/32600.pdf

La crevette rose (Palaemon serratus, Pennant) - Biologie et Pêche - Bibliographie
Provedor de dados: 5
Autores: Coppin, Isabelle.
Tipo: Text
Palavras-chave: Water quality; Salinity; Environment factor; Biology; Palaemon serratus.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/rapport-2105.pdf

Natural factors to consider when using acetylcholinesterase activity as neurotoxicity biomarker in Young-Of-Year striped bass (Morone saxatilis)
Provedor de dados: 5
Autores: Durieux, Eric; Farver, Thomas B.; Fitzgerald, Patrick S.; Eder, Kai J.; Ostrach, David J.
Acetylcholinesterase (AChE) activity is one of the most common biomarkers of neurotoxicity used in aquatic organisms. However, compared to its extensive use as biomarker, the effects of natural factors onAChE activity remain unclear especially in estuarine fishes. The aim of this study was to evaluate the effects of natural factors on AChE activity of striped bass (Morone saxatilis) juveniles. Brain AChE activity was measured in YOY (Young-Of-Year) individuals collected monthly from August 2007 to January 2008 at 12 different sites in the San Francisco Estuary system. The spatio-temporal variability of AChE was analyzed relative to water temperature and salinity as well as fish size. AChE activity was highly positively correlated with water temperature and...
Tipo: Text
Palavras-chave: Fish; Biomarker; Acetylcholinesterase; Brain; Temperature; Salinity; Size.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00008/11939/8642.pdf

Toxin and Growth Responses of the Neurotoxic Dinoflagellate Vulcanodinium rugosum to Varying Temperature and Salinity
Provedor de dados: 5
Autores: Abadie, Eric; Muguet, Alexia; Berteaux, Tom; Chomerat, Nicolas; Hess, Philipp; Roque D'Orbcastel, Emmanuelle; Masseret, Estelle; Laabir, Mohamed.
Vulcanodinium rugosum, a recently described species, produces pinnatoxins. The IFR-VRU-01 strain, isolated from a French Mediterranean lagoon in 2010 and identified as the causative dinoflagellate contaminating mussels in the Ingril Lagoon (French Mediterranean) with pinnatoxin-G, was grown in an enriched natural seawater medium. We tested the effect of temperature and salinity on growth, pinnatoxin-G production and chlorophyll a levels of this dinoflagellate. These factors were tested in combinations of five temperatures (15, 20, 25, 30 and 35 °C) and five salinities (20, 25, 30, 35 and 40) at an irradiance of 100 µmol photon m−2 s−1. V. rugosum can grow at temperatures and salinities ranging from 20 °C to 30 °C and 20 to 40, respectively. The optimal...
Tipo: Text
Palavras-chave: Vulcanodinium rugosum; Mediterranean Ingril Lagoon; Toxin production; Growth conditions; Temperature; Salinity.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00333/44429/44095.pdf

Flow cytometry to measure impact of temperature and salinity on the survival of Bonamia ostreae, parasite infecting flat oyster Ostrea edulis, in seawater
Provedor de dados: 5
Autores: Arzul, Isabelle; Bond, Celine; Gagnaire, Beatrice; Morga, Benjamin; Chollet, Bruno; Ferrand, Sylvie; Robert, Maeva; Renault, Tristan.
Bonamiosis due to the intrahaemocytic protistan parasite Bonamia ostreae is a European endemic disease affecting the flat oyster, Ostrea edulis. After its first description in June 1979&amp;#305; in Brittany, the parasite rapidly spread to all French oyster farming areas and in other European countries through transfers of live molluscs. The parasite has been described in different ecosystems from estuaries to open sea and no clear correlations could he demonstrated between the disease development and environmental parameters like temperature or salinity. The infection can he directly transmitted by cohabitation between infected and non infected oysters. Nevertheless, the parasite life cycle, including its survival outside the host, is not completely...
Tipo: Text
Palavras-chave: Impact; Salinity; Temperature; Flow cytometry; Bonamia ostreae; Parasite; Ostrea edulis; Oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3372.pdf

The salinity signature of the equatorial Pacific cold tongue as revealed by the satellite SMOS mission
Provedor de dados: 5
Autores: Maes, Christophe; Reul, Nicolas; Behringer, David; O'Kane, Terence.
The space-borne measurements of the SMOS mission reveal for the first time the complete features of the sea surface salinity (SSS) signature at the full scale of the Pacific basin. The SSS field in the equatorial cold tongue is typically found to be larger than 35.1 within a narrow 2° band of latitude that is positioned slightly south of the equator and that stretches across the eastern Pacific basin up to the Galapagos Islands. On the northern edge of the eastern equatorial Pacific this signature results in a very strong horizontal gradient (larger than 2 units over 100 km) with the fresh waters of the Panama warm pool. By considering a water density criterion, it can be shown that the cold tongue is characterized by a strong seasonal cycle with a 3°C...
Tipo: Text
Palavras-chave: Physical oceanography; Cold tongue; Salinity; Remote sensing data; Pacific ocean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00245/35577/34109.pdf

Role of steroid hormones and external factors in the control of pituitary gonadotropic activity of female European eel (Anguilla anguilla ).
Provedor de dados: 5
Autores: Leloup, H; Fontaine, Y; Dufour, S; Querat, B.
Gonadotropic activity is relatively low in the female freshwater (FW) eel (A. anguilla ): pituitary GTH was about 15 ng equivalent cGTH/mg fresh tissue. Plasma GTH was always less than 1 ng equivalent cGTH/ml and often undetectable (&lt; 0.2 ng equivalent cGTH/ml). Ovarian steroidogenesis in FW fish is similarly low; plasma concentration of both free testosterone (T) and free estradiol (E sub(2)) were less than 0.3 ng/ml as measured by RIA. Treatment with E sub(2) in FW fish caused a great increase in pituitary GTH, up to 1000 times control values, without changing plasma GTH. Stimulation of gonadotropic activity and ovarian development occur during the eel's migration to the Sargasso Sea. Adaptation to seawater (SW) caused a great increase of plasma E...
Tipo: Text
Palavras-chave: Anguilla anguilla; Anguillidae; Pisces; Migrations; Salinity; Environmental factors; Pituitary gland; Sexual reproduction; Ovaries; Sexual maturity; Steroids; Sex hormones; Facteurs externes; Steroids sexuels; Gonadotropine; Anguille.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1217.pdf

Spatio-temporal dynamics of a Zostera noltii dominated community over a period of fluctuating salinity in a shallow lagoon, Southern France
Provedor de dados: 5
Autores: Charpentier, Aude; Grillas, P; Lescuyer, F; Coulet, E; Auby, Isabelle.
The consequences of a sudden decrease in water salinity on a macrophyte community dominated by the marine species Zostera noltii were investigated in a shallow coastal lagoon (Southern France). The expected change in the community assemblage was a competitive displacement of Z. noltii by Potamogeton pectinatus and Ruppia cirrhosa. However, the results of an eight-year survey did not validate this hypothesis. Zostera noltii remained dominant after three years at low salinity (ca. 5) and then suddenly disappeared within one year. The decline of Z. noltii was not associated with an increase of other species. The maximum depth colonized by all species decreased, suggesting that light availability became a limiting factor for the aquatic vegetation. The high...
Tipo: Text
Palavras-chave: Mediterranean sea; Lagoon; Recovery; Loss; Turbidity; Salinity; Mapping; Seagrass.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-3693.pdf

The role of phosphorus on planktonic production of the Gironde plume waters in the Bay of Biscay
Provedor de dados: 5
Autores: Labry, Claire; Herbland, Alain; Delmas, Daniel.
More and more studies emphasize the status of phosphorus (P) as the principal limiting nutrient of phytoplankton growth, especially in coastal waters under the influence of freshwater discharges. The purpose of the present paper is to investigate the role of P on planktonic production in the waters influenced by the Gironde discharges; the Gironde being one of the two largest rivers on the French Atlantic coast. The survey is based on several cruises made in 1998 and 1999. Two different patterns were observed for waters with salinity below and above 34.5. For waters with salinity &lt;34.5. P was found to be the first limiting nutrient of winter and spring phytoplankton blooms, based on undetectable phosphate (&lt;20 nM), high NO3 : PO4 ratios, typically...
Tipo: Text
Palavras-chave: Bay of Biscay; River plume; Salinity; Water quality analysis; Phytoplankton; Planktonic production.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-690.pdf

Mg/Ca-paleothermometry in the western Mediterranean Sea on planktonic foraminifer species Globigerina bulloides: Constraints and implications
Provedor de dados: 5
Autores: Boussetta, Soumaya; Kallel, Nejib; Bassinot, Franck; Labeyrie, Laurent; Duplessy, Jean-claude; Caillon, Nicolas; Dewilde, Fabien; Rebaubier, Helene.
We generated a high-resolution SSTMg/Ca record for the surface-dwelling planktonic foraminifera Globigerina bulloides from the core MD99-2346 collected in the Gulf of Lion, and compared it to that obtained using modern analogue techniques applied to fossil foraminiferal assemblages (SSTMAT). The two temperature records display similar patterns during the last 28,000 years but the SSTMg/Ca estimates are several degrees warmer (similar to+4 degrees C) than SSTMAT. The temperature shift between SSTMg/Ca and SSTMAT remained relatively constant over time. This seems to exclude a bias on the Mg/Ca record associated with salinity or secondary Mg-rich calcite encrustation on the foraminiferal tests during early diagenesis. Therefore, anomalously high Mg/Ca...
Tipo: Text
Palavras-chave: Mediterranean; Mg/Ca; Planktonic foraminifera; Sea surface Temperature; Salinity; Diagenesis; Vital effect.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00139/25047/23181.pdf

Metabolism of the Pacific oyster,     Crassostrea gigas     , is influenced by salinity and modulates survival to the Ostreid herpesvirus OsHV-1
Provedor de dados: 5
Autores: Fuhrmann, Marine; Delisle, Lizenn; Petton, Bruno; Corporeau, Charlotte; Pernet, Fabrice.
The Pacific oyster, Crassostrea gigas, is an osmoconforming bivalve exposed to wide salinity fluctuations. The physiological mechanisms used by oysters to cope with salinity stress are energy demanding and may impair other processes, such as defense against pathogens. This oyster species has been experiencing recurrent mortality events caused by the Ostreid herpesvirus 1 (OsHV-1). The objectives of this study were to investigate the effect of salinity (10, 15, 25 and 35‰) on energetic reserves, key enzyme activities and membrane fatty acids, and to identify the metabolic risk factors related to OsHV-1-induced mortality of oysters. Acclimation to low salinity led to increased water content, protein level, and energetic reserves (carbohydrates and...
Tipo: Text
Palavras-chave: Bivalve; Disease; Environment; Metabolism; Mortality risk; Salinity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00427/53886/54958.pdf

Hydrographical variability on the French continental shelf in the Bay of Biscay, during the 1990s
Provedor de dados: 5
Autores: Puillat, Ingrid; Lazure, Pascal; Jegou, Anne-marie; Lampert, Luis; Miller, P.
A synthesis of 9 years of hydrographic measurements, acquired during approximately 25 cruises (1992-2000) on the French continental shelf of the Bay of Biscay, is presented. The main focus is upon salinity distribution, as it is little known in this area. The whole of the data set covers I I months of the year, with some sampling fields repeated several times a year, for multiple years. This time-series allows temperature and salinity distributions to be studied together with their seasonal, inter-annual and mesoscale variability.   The seasonal trend in temperature can be described in three stages, which are in agreement with past studies. Thermal stratification occurs between May and mid-September in a layer similar to 50 m in thickness, whereas the...
Tipo: Text
Palavras-chave: Upwelling; Cold pool; River plumes; Seasonal variability; Salinity; Hydrography.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/2004/publication-779.pdf

Développement et essais d’un salinomètre optique pour l’océanographie
Provedor de dados: 5
Autores: Le Menn, Monique; Malardé, Damien; David, Arnaud; Brault, Patrice; Grosso, Philippe; De Bougrenet De La Tocnaye, Jean-louis; Le Reste, Serge; Podeur, Christian.
Salinity is the essential parameter for ocean dynamics studies. Its definition and using in the equations used to calculate the thermodynamic properties of seawater, were revised in 2010, opening the possibility of new sensors developments. In this context, NOSS (NKE Optical Salinity Sensor) has emerged as one of the first underwater instrument for in situ refractive index measurement in the past years open up the scope of possibilities to access to density parameter. This achievement is the fruit of the cooperation between several institutions and the fruit of several years of developments and trials. NOSS sensor is designed to be deployed in coastal environment and open-ocean waters up to 2000m, especially on profiling floats of the Argo network.
Tipo: Text
Palavras-chave: Salinity; Density; Ocean; Seawater; Refractive index; Sensor.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00664/77601/79616.pdf

Prediction of faecal contamination in shellfish production areas: Interest and limits of the salinity parameter
Provedor de dados: 5
Autores: Le Saux, Jean-claude; Le Vaillant, Gael; Guillermou, Ghislain; Vilbas, Jean-valere; Deter, Julie; Delyon, Bernard; Le Guyader, Soizick; Pommepuy, Monique.
Estuarine areas are sensitive to rapid and punctual contamination linked to heavy rainfall inducing rapid fresh water input. Thus, the increase of seawater contamination may be linked to a salinity decrease. The objective of this study was to measure salinity variation as a proxy to evaluate the risk of faecal contamination. Salinity sensors were set up on shellfish beds in Daoulas estuary (Bay of Brest) and monitored every 10 min over a four year period. Precipitation and river flows were also recorded. Moreover E. coli concentrations and salinity were measured in the estuarine surface water during different hydrodynamic conditions and seasons. The results indicated a significant relationship between E. coli concentration and salinity in the estuary....
Tipo: Text
Palavras-chave: Salinity; Sensor; E. coli; Shellfish; Prediction; Alert; Daoulas estuary.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00066/17751/15273.pdf

Effects of temperature and salinity on haemocyte activities of the Pacific oyster, Crassostrea gigas (Thunberg)
Provedor de dados: 5
Autores: Gagnaire, Beatrice; Frouin, Heloise; Moreau, Kevin; Thomas Guyon, Helene; Renault, Tristan.
The Pacific oyster, Crassostrea gigas, is extensively cultivated and represents an important economic activity. Oysters are reared in estuarine areas, subjected to various biotic and abiotic factors. One of the limiting factors in aquaculture is mortality outbreaks, which may limit oyster production, and the causes of these outbreaks are not completely understood. In this context, the effects of temperature and salinity on Pacific oyster, C. gigas, haemocytes, were studied. Haemocytes are the invertebrate blood cells and thus have been shown to be involved in defence mechanisms. Flow cytometry was used for monitoring several haemocyte parameters. An increase of temperature induced an increase of haemocyte mortality, in both in vitro and in vivo...
Tipo: Text
Palavras-chave: Cellular activity; Flow cytometry; Salinity; Temperature; Haemocyte; Crassostrea gigas; Pacific oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-934.pdf

Hydrological characterisation of Ria de Aveiro, Portugal, in early summer
Provedor de dados: 5
Autores: Dias, Jm; Lopes, Jf; Dekeyser, I.
The hydrological features of Ria de Aveiro, a coastal lagoon on the northwest Atlantic coast of Portugal, were investigated in two sampling surveys carried out between 3/6 and 24/6/97 and between 29/6 and 7/7/97, respectively There was a significant freshwater inflow into the lagoon during the first survey, especially in the first days, due to the recent rainfalls. Records concerning water level, salinity, temperature and current velocity were performed at several stations located along the four main channels of the lagoon. The type of tide at the mouth was determined and was observed that astronomical tide is the main forcing agent driving water circulation in Ria de Aveiro. The tide at the mouth is semidiurnal and the tidal wave propagation in the lagoon...
Tipo: Text
Palavras-chave: Surélévation; Salinité; Température; Vitesse du courant; Ria de Aveiro; Water level; Salinity; Temperature; Current velocity; Ria de Aveiro.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43597/43928.pdf

Dynamical contribution to sea surface salinity variations in the eastern Gulf of Guinea based on numerical modelling
Provedor de dados: 5
Autores: Berger, Henrick; Treguier, Anne-marie; Perenne, Nicolas; Talandier, Claude.
In this study, we analyse the seasonal variability of the sea surface salinity (SSS) for two coastal regions of the Gulf of Guinea from 1995 to 2006 using a high resolution model (1/12°) embedded in a Tropical Atlantic (1/4°) model. Compared with observations and climatologies, our model demonstrates a good capability to reproduce the seasonal and spatial variations of the SSS and mixed layer depth. Sensitivity experiments are carried out to assess the respective impacts of precipitations and river discharge on the spatial structure and seasonal variations of the SSS in the eastern part of the Gulf of Guinea. In the Bight of Biafra, both precipitations and river runoffs are necessary to observe permanent low SSS values but the river discharge has the...
Tipo: Text
Palavras-chave: Gulf of Guinea; Salinity; Modelling; Congo; Bight of Biafra; Mixed layer budget.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00194/30493/29215.pdf

Analysis of the black-chinned tilapia Sarotherodon melanotheron heudelotii reproducing under a wide range of salinities: from RNA-seq to candidate genes
Provedor de dados: 5
Autores: Avarre, Jean-christophe; Dugue, R.; Alonso, Pascal; Diombokho, A.; Joffrois, C.; Faivre, N.; Cochet, C.; Durand, Jean Dominique.
The black-chinned tilapia Sarotherodon melanotheron heudelotii is an ecologically appealing model as it shows exceptional adaptive capacities, especially with regard to salinity. In spite of this, this species is devoid of genomic resources, which impedes the understanding of such remarkable features. De novo assembly of transcript sequences produced by next-generation sequencing technologies offers a rapid approach to obtain expressed gene sequences for non-model organisms. It also facilitates the development of quantitative real-time PCR (qPCR) assays for analysing gene expression under different environmental conditions. Nevertheless, obtaining accurate and reliable qPCR results from such data requires a number of validations prior to interpretation....
Tipo: Text
Palavras-chave: Gene expression; Non-model organism; Reference gene; Salinity; Spermatogenesis; Tilapia.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28255/26625.pdf

Comparison of spaceborne measurements of sea surface salinity and colored detrital matter in the Amazon plume
Provedor de dados: 5
Autores: Fournier, Severine; Chapron, Bertrand; Salisbury, J.; Vandemark, Douglas; Reul, Nicolas.
Large rivers are key hydrologic components in oceanography, particularly regarding air-sea and land-sea exchanges and biogeochemistry. We enter now in a new era of Sea Surface Salinity (SSS) observing system from Space with the recent launches of the ESA Soil Moisture and Ocean Salinity (SMOS) and the NASA Aquarius/Sac-D missions. With these new sensors, we are now in an excellent position to revisit SSS and ocean color investigations in the tropical northwest Atlantic using multi-year remote sensing time series and concurrent in situ observations. The Amazon is the world's largest river in terms of discharge. In its plume, SSS and upper water column optical properties such as the absorption coefficient of colored detrital matter (acdm) are strongly...
Tipo: Text
Palavras-chave: Amazon-Orinoco river plume; SMOS SSS; Conservative mixing; Ocean color; Salinity; Satellite oceanography.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00255/36610/35742.pdf

Physiological and Metabolic Responses of Freshwater and Brackish-Water Strains of   Microcystis aeruginosa   Acclimated to a Salinity Gradient: Insight into Salt Tolerance
Provedor de dados: 5
Autores: Georges Des Aulnois, Maxime; Roux, Pauline; Caruana, Amandine; Réveillon, Damien; Briand, Enora; Hervé, Fabienne; Savar, Veronique; Bormans, Myriam; Amzil, Zouher; Atomi, Haruyuki.
Proliferation of microcystin (MC)-producing Microcystis aeruginosa in brackish waters has been described in several locations and represents a new concern for public and environmental health. While the impact of a sudden salinity increase on M. aeruginosa physiology has been studied, less is known about the mechanisms involved in salt tolerance after acclimation. This study aims to compare the physiological responses of two strains of M. aeruginosa (PCC 7820 and PCC 7806), which were isolated from contrasted environments, to increasing salinities. After acclimation, growth and MC production rates were determined and metabolomic analyses were conducted. For both strains, salinity decreased the biovolume, growth, and MC production rates and induced the...
Tipo: Text
Palavras-chave: Acclimation; Metabolomic; Microcystis; Salinity; Sucrose; Trehalose; Ecophysiology.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/70031/68012.pdf

Combining six genome scan methods to detect candidate genes to salinity in the Mediterranean striped red mullet (Mullus surmuletus)
Provedor de dados: 5
Autores: Dalongeville, Alicia; Benestan, Laura; Mouillot, David; Lobreaux, Stephane; Manel, Stephanie.
Background: Adaptive genomics may help predicting how a species will respond to future environmental changes. Genomic signatures of local adaptation in marine organisms are often driven by environmental selective agents impacting the physiology of organisms. With one of the highest salinity level, the Mediterranean Sea provides an excellent model to investigate adaptive genomic divergence underlying salinity adaptation. In the present study, we combined six genome scan methods to detect potential genomic signal of selection in the striped red mullet (Mullus surmuletus) populations distributed across a wide salinity gradient. We then blasted these outlier sequences on published fish genomic resources in order to identify relevant potential candidate genes...
Tipo: Text
Palavras-chave: Adaptive genomics; Genome scan; Candidate genes; Mediterranean Sea; Mullus surmuletus; Salinity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00438/54992/75081.pdf

Plasma ion levels of freshwater and marine/estuarine teleosts from Southern Brazil
Provedor de dados: 83
Autores: Becker,Alexssandro Geferson; Gonçalves,Jamile Fabbrin; Toledo,Jaderson dos Anjos; Burns,Marcelo D. M.; Garcia,Luciano de Oliveira; Vieira,João Paes; Baldisserotto,Bernardo.
The purpose of this study was to investigate Na+, Cl-, K+, Ca2+, and Mg2+ levels in the plasma of freshwater and marine/estuarine teleosts collected at different salinities (0 to 34) from the estuarine and freshwater portions of the São Gonçalo channel in Southern Brazil. Any relationship between plasma ion levels and salinity and the capacity of ionic regulation of teleosts found at three or more different salinities (Genidens barbus and Micropogonias furnieri) was also investigated. Results showed no relationship between plasma ion levels and salinity when considering all species together, but the two species collected from three or more different salinities showed a significant positive relationship between plasma ion levels and salinity, indicating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ariidae; Estuaries; Ionoregulation; Osmoregulation; Salinity; Sciaenidae.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000400021

The life span of theront stages of Cryptocaryon irritans in different media, temperature and salinity
Provedor de dados: 19
Autores: Chu, Kua Beng; Seng, Leong Tak; Yong, Wong See; Thye, Chuah Toh; Veloo, Palanisamy.
Study on the in vitro survival of the theront stages of Cryptocaryon irritans in different nutrient media, temperature and salinity showed that these three factors could influence then- life span. Theront of C. irritans had a longer mean life span in HBSS (62.40±23.02 hrs) and BBSS (46.64 ± 13.29 hrs) compared to control seawater medium (29.23 ± 6.81 hrs). The shortest mean life span was obtained from the MEME non-essential ammo acid medium ranging from 0.45 to 0.83 hrs. Out of 9 media, only 2 media (HBSS and BBSS) managed to prolong the life span of theront compared to the other 7 media (MEME, MEME non-essential amino acid, L-15 with 5% serum, L-15 with 10% serum, tissue homogenate (gills, scale &amp; mucus, fin and muscle). Tukey HSD analysis showed that...
Palavras-chave: Cryptocaryon irritans; Theront; Fish protozoan; Temperature; Media; Salinity.
Ano: 2001
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/139

Efectos del aporte fluvial en la salinidad y los nutrientes del Golfo de Guacanayabo, Cuba, en meses lluviosos de 2008 y 2009
Provedor de dados: 20
Autores: Garcés, Y.; Betanzos, A.
Muestreos realizados en meses lluviosos de los años 2008 y 2009 manifiestan influencia de aguas dulces en la salinidad del Golfo de Guacanayabo, registrándose valores promedios de 34,9 y 33,6 ‰, respectivamente. Elementos no conservativos como el SiO3, el P-PO4- y el N-NH4+ manifiestan una tendencia al incremento a medida que disminuye la salinidad presentándose correlaciones negativas significativas (α&lt;0,05), corroborando la importancia de los escurrimientos fluviales en el aporte de nutrientes. Los bajos coeficientes de correlación denotan otras fuentes de aporte. En comparación con registros anteriores se observan disminuciones en los SiO3, incrementos del P-PO4- y una variabilidad con tendencia ascendente-descendente en los compuestos nitrogenados.
Tipo: Preprint
Palavras-chave: Salinity; Nutrients (mineral); Salinity; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2010
URL: http://hdl.handle.net/1834/3628

Variabilidad oceanográfica en el Estrecho Bransfield asociada con el evento ENSO 1997-1998
Provedor de dados: 20
Autores: Martínez, R.
Dentro de las actividades científicas contempladas en la VII Expedición Ecuatoriana a la Antártida para enero de 1998 en Buque de Investigación de la Armada B/I Orión efectuó un crucero oceanográfico en el Estrecho Branfield. Se efectuaron 14 estaciones oceanográficas hasta 500 metros, se realizaron mediciones de corriente utilizando un perfilador acústico doppler. Tomando como referencia trabajos anteriores en el área en años sin influencia de eventos cálidos se compararon los parámetros físicos. Luego del análisis se concluye que el evento ENSO 97-98 tuvo repercusiones evidentes en el área de estudio manifestada en dos aspectos básicos: El incremento de la temperatura y la disminución de la salinidad a nivel superficial. Esta variación habría generado un...
Tipo: Journal Contribution
Palavras-chave: Variability; Thermohaline circulation; Salinity; Water masses; El Nino phenomena; Cruises; Research vessels; Salinity.
Ano: 1998
URL: http://hdl.handle.net/1834/3838

Global Temperature-Salinity Profile Programme (GTSPP) - Overview and Future
Provedor de dados: 20
Autores: Wilson, J.R.
This document is directed to the scientific research community and users of operational ocean data. It is also intended to provide an example and be a source of information to programmes such as the Global Ocean Observing System (GOOS) for developing and implementing end-to-end data management systems. The document is also directed towards Member States of IOC. It discusses how Member States can make contributions and how they can benefit from the GTSPP.
Tipo: Report
Palavras-chave: Oceanography; Temperature data; Temperature measurement; Ocean circulation; Salinity; Salinity data; Salinity measurement; Salinity profiles; Salinity scales; Salinity.
Ano: 1998
URL: http://hdl.handle.net/1834/2796

Variación mensual del plancton en una estación fija La Libertad (Salinas), Ecuador.  Período: 1988 - 1989
Provedor de dados: 20
Autores: Bonilla, M.A.
El presente trabajo es el resultado del estudio cuali-cuantitativo de análisis de plancton colectado mediante muestreos mensuales en aguas superficiales costeras en una estación fija en La Libertad (Salinas) entre diciembre 1988 y diciembre 1989. Se dan a conocer 29 grupos de organismos del zooplancton, determinándose que los dominantes en orden decreciente fueron: larvas de eufáusidos, quetognatos, apendicularios, larvas de decápodos, huevos de peces, foraminíferos, cladóceros, huevos de decápodos y los más frecuentes: copépodos, apendicularios, quetognatos, larvas de decápodos y huevos de peces. Se presentan las especies más abundantes y dominantes de copépodos en orden decreciente: Acartia levequei, Centropages furcatus y Temora discaudata. Se determina...
Tipo: Journal Contribution
Palavras-chave: Plankton; Zooplankton; Seasonal distribution; Geological distribution; Salinity; Temperature; Plankton; Zooplankton; Salinity; Temperature; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_7657.
Ano: 1990
URL: http://hdl.handle.net/1834/2165

Variaciones verticales y su relación con algunos parámetros físico-químicos en una estación fija en el área externa del Golfo de Guayaquil
Provedor de dados: 20
Autores: Chiriguaya, J.; Burgos, L.
Las variaciones hidroquímicas (oxígeno disuelto, nitrato, fosfato y silicato) fueron estudiadas durante 12 horas con intervalos de aproximadamente 3 horas en una estación fija situada frente al Golfo de Guayaquil entre las coordenadas 02° 59' 42 S-81° 40' 92 W. La máxima profundidad en la que se efectuó dicho análisis fue hasta los 50 metros. Se ha detectado una posible relación entre las variaciones verticales (Ondas Internas) y los parámetros físico-químicos, ya que las fluctuaciones de ascensos y descensos fueron observadas en las concentraciones de oxígeno y nutrientes, siendo las ondas internas un factor preponderante en los movimientos verticales de éstos. Estas fluctuaciones también fueron encontradas en el comportamiento de la temperatura,...
Tipo: Journal Contribution
Palavras-chave: Chemical oceanography; Temperature; Salinity; Vertical distribution; Chemical oceanography; Temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_1516; Http://aims.fao.org/aos/agrovoc/c_7657; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1990
URL: http://hdl.handle.net/1834/2179

Guide to operational procedures for the collection and exchange of oceanographic data (bathy and tesac)
Provedor de dados: 20
All nations are profoundly influenced by the world oceans in many ways - some direct and obvious, others indirect and more subtle. Even those countries without ocean coastline feel the influence of the ocean, for example, as it affects world-wide weather and climate and In the availability of foreign goods and access to distant markets. Some influences of the ocean are benefitial; others may be detrimental to human activities ; most are beyond our ability to control, except in very limited ways, but, forewarned with a knowledge of the state of the ocean and even a limited prediction of future trends, it may often be possible to maximize the beneficial effects and to avoid or guard effectively against those which could be detrimental. The Integrated Global...
Tipo: Book
Palavras-chave: Oceanography; Current measurement; Current data; Current measuring equipment; Salinity; Salinity data; Salinity measuring equipment; Salinity measurement; Temperature data; Temperature measurement; Temperature gradients; Subsurface currents; Subsurface water; Surface salinity; Surface temperature; Salinity; Subsurface water; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_25316.
Ano: 1984
URL: http://hdl.handle.net/1834/2721

Variación de la salinidad y su relación con la distribución por talla del ostión de mangle en Villa Clara, Cuba
Provedor de dados: 20
Autores: Betanzos Vega, A.; Siam Lahera, C.; Arencibia Carballo, G.
A partir de información antecedente y de muestreos realizados en los años 2006 y 2008, se determinaron incrementos de la salinidad en aguas al norte de la provincia de Villa Clara, Cuba; realizándose comparaciones entre esta variable y la talla de ostiones (Crassostrea rhizophorae Guilding, 1828) en la Bahía Sagua la Grande. Se encontró diferencia significativa entre la salinidad por estaciones, y entre la talla media de ostiones por sitios de muestreo (ANOVA, p &lt; 0,05). Se presentan relaciones inversas estadísticamente significativas entre la salinidad y la talla media de los ostiones: en febrero de 2006, R2  = 0,91;   &lt; 0,05 y en enero de 2008, R2 = 0,94;    &lt; 0,05. La distribución horizontal de la salinidad incide en la estructura de tallas por...
Tipo: Journal Contribution
Palavras-chave: Salinity; Salinity; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2010
URL: http://hdl.handle.net/1834/4113

Assessment of an environmental barrier to transport of ichthyoplankton from the southern to
Provedor de dados: 20
Autores: Lett, Christophe; Veitch, Jennifer; Van der Lingen, Carl D.; Hutchings, Larry.
The Lüderitz upwelling cell and Orange River cone (LUCORC) area, a transboundary region between South Africa and Namibia, is considered to be an environmental barrier to transport of ichthyoplankton from the southern to the northern Benguela upwelling ecosystems. We use environmental data and modelling to assess the potential mechanisms responsible for this barrier: environmental data were extracted from the 1 × 1° World Ocean Atlas 2001 database and used to build maps of annual mean salinity, temperature, chlorophyll, dissolved oxygen and nutrient concentrations; outputs of a regional circulation model were used in an individual-based model to assess the transport of passive particles from the southern to the northern Benguela. The data show no clear...
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Upwelling; Modelling; Coastal oceanography; Trade winds; Salinity; Hydrodynamics; Cartesian coordinates; Chlorophylls.
Ano: 2007
URL: http://hdl.handle.net/1834/4667

Estudios de algunas características físicas y biológicas de la columna de agua en Bahía Chile-Isla Greenwich
Provedor de dados: 20
Autores: Cornejo, María P.; Arcos, F.
Se determinaron algunas características físicas y biológicas de la columna de agua en Bahía Chile, Isla Greenwich, por medio de la distribución espacial de temperatura, salinidad y clorofila "a", durante el verano austral (febrero de 1990). Las distribuciones verticales de las isotermas, isohalinas, isopicnas e isolíneas de clorfila "a" muestran que la circulación predominante es termohalina, influenciada por la topografía de la bahía, con un flujo subsuperficial que entra por el lado noroccidental de la misma y se dirige hacia el centro (siguiendo la topografía), aflora en el extremo interior y sale superficialmente por el lado oriental.
Tipo: Journal Contribution
Palavras-chave: Chemical oceanography; Marine ecology; Salinity; Isotherms; Isopycnics; Thermohaline circulation; Chlorophylls; Chemical oceanography; Marine ecology; Salinity; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_1516; Http://aims.fao.org/aos/agrovoc/c_4609; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 1990
URL: http://hdl.handle.net/1834/3728

Guide to IGOSS data archives and exchange: BATHY &amp; TESAC
Provedor de dados: 20
Autores: IOC.
Tipo: Other
Palavras-chave: Oceanography; Bathymetric profiles; Bathythermographic data; Current meter data; Current measuring equipment; Temperature data; Temperature gradients; Temperature fields; Salinity data; Salinity measurement; Salinity; Salinity; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1993
URL: http://hdl.handle.net/1834/2845

Distribución y composición del macrozooplancton en Bahía Chile y Ensenada Guayaquil, Isla Greenwich-verano austral 1998
Provedor de dados: 20
Autores: Ortega, D.
Durante el verano austral, se efectuó la VII Expedición Antártica Ecuatoriana, a bordo del B/I Orión, perteneciente a la Armada del Ecuador. Entre los meses de enero y febrero de 1998, en la Ensenada Guayaquil y Bahía Chile (Isla Greenwich), se colectaron y analizaron muestras de macrozooplancton obtenidas de arrastres superficales con redes tipo cónica simple de 500μ m, con la finalidad de conocer la distribución y composición del zooplancton. Las salpas fueron los organismos más representativos con el 46%, en segundo lugar estuvieron los copépodos 17% y quetognatos 15%, en la Ensenada Guayaquil donde también se presentó la mayor heterogeneidad zooplanctónica, registrándose la mayor distribución al oeste, próximo a la Isla Dee. En Bahía Chile, la...
Tipo: Journal Contribution
Palavras-chave: Distribution; Composition; Temperature; Salinity; Zooplankton; Distribution; Zooplankton; Temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_7657; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1998
URL: http://hdl.handle.net/1834/3851

Contribución al conocimiento de la oceanografía física del Estrecho Bransfield
Provedor de dados: 20
Autores: Zambrano Q., E.; Cardin, V.
Durante el verano austral de 1988, el Ecuador realizó la Primera Expedición Científica a la Antártica abordo del buque oceanográfico ORION. Se investigó en detalle el Estrecho Bransfiel realizándose un total de 23 estaciones oceanográficas, en las que se tomó información desde la superficie hasta los 500 m. de profundidad, obteniéndose datos de temperatura y salinidad, además de parámetros químicos y bilógicos. En este trabajo se presenta una descripción de las condiciones oceanográficas predominantes durante las fechas del muestreo así como la estructura termohalina del estrecho; mediante el uso de diagramas T-S se identificaron las masas de agua presentes en la región. Del análisis de la topografía dinámica se deduce que la circulación es hacia NE y, en...
Tipo: Journal Contribution
Palavras-chave: Temperature; Salinity; Water masses; Thermohaline circulation; Dynamic topography; Oceanographic stations; Physical oceanography; Physical oceanography; Temperature; Salinity.
Ano: 1989
URL: http://hdl.handle.net/1834/3826

Características hidroquímicas de las Bahías Chile, Almirantazgo y Fildes, Islas Shetland del Sur. Verano austral 1990/91
Provedor de dados: 20
Autores: Rodríguez de Moran, A.; Valencia T., M.; Vega, M.
Se presentan las características hidroquímicas de las aguas de las Bahías Chile, Almirantazgo y Fildes, en las Islas del Archipiélago Shetland del Sur, en base a la distribución horizontal y vertical de los parámetros: Oxígeno disuelto, salinidad y micronutrientes inorgánicos (fosfato, nitrito, nitrato y silicato). En forma general, se observa aguas bién oxigenadas, con salinidad relativamente baja, especialmente en la capa superficial, parámetro influenciado por el aporte de aguas de deshielo de los glaciares cercanos. Igualmente alta concentración relativa de micronutrientes inorgánicos, con escasa estratificación de los mismos.
Tipo: Journal Contribution
Palavras-chave: Water analysis; Vertical distribution; Horizontal distribution; Dissolved oxygen; Salinity; Nutrients (mineral); Dissolved oxygen; Water analysis; Salinity.
Ano: 1993
URL: http://hdl.handle.net/1834/3768

Productividad primaria en la Ciénaga Grande de Santa Marta, Colombia
Provedor de dados: 20
Autores: Hernández-J., C.A.; Gocke, K.
Entre enero 1987 y enero 1988 se estudiaron la productividad primaria y una serie de factores relacionados con ella en la Ciénaga Grande de Santa Marta. La Ciénaga es una laguna costera de 423 km2 de área y de 1.6 m de profundidad media, situada en la costa caribeña de Colombia y sometida a una fluctuación fuerte de salinidad. Se trata de un sistema acuático con una alta concentración de seston y una gran productividad primaria. La concentración de clorofila "a" Fluctuó entre 5.6 y 181 ug I ' , el promedio anual fue de 59 ug I ' . La concentración de proteínas 0sciló entre 0.9 y 9.5 mg I"' , el promedio anual fue de 4.2 mg T1 . La productividad primaria bruta anual en la parte central de la Ciénaga fue de 1690 g C m-2 . Los valores extremos en todo el...
Tipo: Journal Contribution
Palavras-chave: Primary production; Turbidity; Nutrients (mineral); Salinity; Hydrology; Coastal lagoons; Estuaries; Primary production; Turbidity; Estuaries; Salinity; Hydrology; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_15043; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_3731; Http://aims.fao.org/aos/agrovoc/c_1697.
Ano: 1990
URL: http://hdl.handle.net/1834/3886

Effets de la  salinité et de la température du milieu sur le degré de saturation des acides gras et sur les différentes catégories lipidiques des alevins de Mugil cephalus.
Provedor de dados: 20
Autores: El Cafsi., M.; Kheriji., S.; Masmoudi., W.; Romdhane., M.S.
Le suivi de l’évolution des lipides des alevins de Mugil cephalus en fonction de la salinité et de la température du milieu, montre qu’après acclimatation à 14°C, le rapport acides gras polyinsaturés/acides gras saturés, chez les alevins acclimatés à la basse salinité (0,5‰) augmente de 6,5%. D’autre part, nous avons noté une diminution de 65% de la masse des triacylglycérols et une augmentation de 37% de celle des lipides polaires.  Par ailleurs, nous avons relevé que l’abaissement de la température du milieu de 26 à 14°C, entraîne une augmentation plus importante du rapport acides gras polyinsaturés/acides gras saturés à 0,5‰ qu’à  35‰. La diminution de la température du milieu provoque  une augmentation respective de 365 et de 53%, de la masse des...
Tipo: Journal Contribution
Palavras-chave: Biochemical composition; Salinity; Lipids; Fry; Fatty acids; Temperature; Accumulation; Mugil cephalus; Http://aims.fao.org/aos/agrovoc/c_35403.
Ano: 2000
URL: http://hdl.handle.net/1834/4296

Caractérisation physico-chimique de la partie sud ouest de la baie de Tunis sous l’influence des apports de l’oued Meliane
Provedor de dados: 20
Autores: Ben Lamine, Y.; Daly Yahia-Kefi, O.; Daly Yahia Mohamed, N.
La partie sud ouest de la baie de Tunis subit les apports de l’oued Méliane qui est le deuxième oued pérenne de la Tunisie. Afin de cerner le profil physicochimique de cette partie de la baie, des prélèvements mensuels ont été effectués au niveau de 22 stations dont 19 dans la partie Sud Ouest de la baie de Tunis et 3 en aval de l’oued Méliane pendant les deux saisons, estivale et automnale de l’année 2004. Les valeurs de la température étaient conformes aux normes saisonnières et la salinité était faible à l'embouchure de l'oued Méliane suite aux apports d'eau douce. Les teneurs en sels nutritifs (nitrates, phosphates et ammonium) étaient très élevées et ont classé la qualité des eaux de la partie sud ouest de la baie de Tunis dans la catégorie "médiocre"...
Tipo: Journal Contribution
Palavras-chave: River inflow; Salinity; Water samples; Physicochemical properties.
Ano: 2011
URL: http://hdl.handle.net/1834/4743

Characterizing and Comparing the Spawning Habitats of Sardine (Sardinops sagax) and Anchovy (Engraulis encrasicolus) in the Northern Benguela Region
Provedor de dados: 20
Autores: Tjizoo,Mbeurora Beau.
Spawning habitats of sardine and anchovy in eastern boundary current systems are characterized in an attempt to understand the fluctuations observed in their abundance. The northern Benguela, as an eastern boundary current system, is characterized by turbulent conditions that seem to govern the variability observed in the abundance of these species. Sardine and anchovy have developed mechanisms that enable them to maximize productivity. In the northern Benguela, spawning intensity is historically known to be high in periods and vicinities where turbulence is reduced. However, it is believed that selection of conditions for spawning by these species may change withfluctuations in abundance of fish.
Tipo: Theses and Dissertations
Palavras-chave: Sardine fisheries; Spawning; Anchovy fisheries; Habitat; Ecosystems; Sea surface temperature; Salinity; Spatial distribution; Climatic changes; Anthropogenic factors; Pelagic environment; Circulation; Coastlines.
Ano: 2008
URL: http://hdl.handle.net/1834/5231

Seasonal variation in surface temperature and salinity around Lagos harbour, Nigeria
Provedor de dados: 20
Autores: Oyewo, E.O.; Ajao, E.A.; Orekoya, T.
Continuous monitoring of Sea and Harbour (Lagoon) Surface temperature and salinity at two stations has been carried out from 1978 to 1981.  This paper presents the findings for the period and relates it to the prevailing meteorological regimes.   The pattern of sea surface temperature at Victoria beach in the study period shows a clearly defined mean maximum temperature of 29.34oC in April, and clearly defined mean minimum temperature of 25.63 in August.  Depending on the year, there may be a less clearly defined mean maximum and minimum temperature in October/November and in January respectively.  The pattern of surface temperature in the Harbour station is basically similar.  The salinity cycle especially in the Harbour was found to be critically...
Tipo: Report
Palavras-chave: Oceanography; Harbours; Water surface temperature; Water surface salinity; Oceanography; Salinity; Surface water.
Ano: 1982
URL: http://hdl.handle.net/1834/1270

GTSPP real-time quality control manual
Provedor de dados: 20
This manual has been produced within the context of the Global Temperature Salinity Pilot Project (GTSPP). Because of the work of assuring the quality of data handled by the Project is shared amongst data centres, it is important to have both consistent and well documented procedures. This manual describes the means by which data quality is assessed and the actions taken as a result of the procedures.
Tipo: Report
Palavras-chave: Temperature; Salinity.
Ano: 1990
URL: http://hdl.handle.net/1834/4331

Características oceanográficas físicas frente a Ecuador durante abril de 1995
Provedor de dados: 20
Autores: Cuadra, T. de la.
More than one hundred oceanographic stations were occupied between the Galápagos Archipiélago and the Ecuadorian coast during April-May 1995. All the information were treated statically using the method of ”Kriging” to interpolate; from this, surface distribution of sea temperature, sea temperature anomalies, air temperature, and atmospheric presion were obtained. These distributions with temperature and salinity profiles showed the end of the warm period 1994-1995. Upwelling events were detected and were supposed to about 24% of AESS. From the mass water analysis carried out to the east San Cristóbal. It was found a probable relationship between the AESS and the ASTS, and the pelagic fisheries.
Tipo: Journal Contribution
Palavras-chave: Oceanographic data; Temperature (air-sea); Atmospheric pressure; Salinity; Atmospheric pressure; Salinity; Http://aims.fao.org/aos/agrovoc/c_693; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1995
URL: http://hdl.handle.net/1834/3026

Comunidades del zooplankton en los ríos Teaone, Esmeraldas, Terminal Petrolero y el balneario Las Palmas de Esmeraldas, durante el 2004
Provedor de dados: 20
Autores: Naranjo, Ch.
Los estudios del zooplancton en diferentes áreas principalmente en el río Teaone, Esmeraldas y la zona marino costera frente a la ciudad que incluye, el área del balneario Las Palmas, en el último año se ha intensificado con el objetivo de obtener un conocimiento detallado de la presencia de estos organismos y las características físico-químicas que condicionan su abundancia y distribución.
Tipo: Journal Contribution
Palavras-chave: Community composition; Zooplankton; Biological production; Salinity; Hydrogen; Water quality; Temporal variations; Species diversity; Zooplankton; Biological production; Water quality; Salinity; Hydrogen; Species diversity; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_3724; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2005
URL: http://hdl.handle.net/1834/2372

Les efflorescences phytoplanctoniques dans le golfe de Gabes (Tunisie) au cours de dix ans de surveillance (1995-205)
Provedor de dados: 20
Autores: Feki, W.; Hamza, A.; Bel Hassen, M.; Rebai, A.
Les données du Réseau National de Surveillance Phytoplanctonique ont été examinées dans le golfe de Gabes durant la période 1995-2005. Un intérêt particulier a été attribué au phénomène de bloom phytoplanctonique. En outre, nous avons examiné plus spécifiquement les variations spatio-temporelles des espèces responsables et les relations avec la variabilité des conditions abiotiques, essentiellement la température, la salinité et le pH. Les résultats ont montré que la période allant d’août à janvier, avec des pics en septembre et janvier, semble être propice à des efflorescences algales. Les dinoflagellés sont responsables de 89% des cas ; l’espèce Karenia selliformis détient à elle seule 64% des occurrences de ce phénomène. Les blooms de K. selliformis,...
Tipo: Journal Contribution
Palavras-chave: Algal blooms; Environmental conditions; Phytoplankton; Salinity; PH.
Ano: 2008
URL: http://hdl.handle.net/1834/4259

Juvenile penaeid shrimp density, spatial distribution and size composition in four adjacent habitats within a Mangrove-Fringed Bay on Inhaca Island, Mozambique
Provedor de dados: 20
Autores: Macia, A.
The effects of habitat characteristics (mangrove creek, sandflat, mudflat and seagrass meadow) water salinity, temperature, and depth on the density, spatial distribution and size distribution of juveniles of five commercially important penaied shrimp species (Metapenaus monoceros, M. stebbingi, Fenneropenaeus indicus, Penaeus japonicus and P. semisulcatus) were investigated during a high shrimp recruitment peak lasting from January to June 2002, in four contiguous habitats within a non-estuarine mangrove bay at Saco da Inhaca, Inhaca Island, Southern Mozambique. A total of 14,976 specimens representing the five species were collected by means of a 1m beam-trawl fitted with a 2 mm mesh net with a cod-end. Every two weeks corresponding with spring tides on...
Tipo: Journal Contribution
Palavras-chave: METAPENAUS MONOCEROS; FENNEROPENAEUS INDICUS; METAPENAEUS STEBBINGI; PENAEUS  SEMISULCATUS; MARSUPENAEUS JAPONICUS; Distribution; Habitat; Juveniles; Salinity; Shrimp culture; Penaeid shrimp fisheries; Mangrove swamps; Seagrass; Mud flats; Distribution; Juveniles; Salinity.
Ano: 2004
URL: http://hdl.handle.net/1834/1121

Global temperature and salinity profile programme (GTSPP)- Data user's manual, first edition
Provedor de dados: 20
Autores: IOC for UNESCO.
The Global Temperature and Salinity Profile Programme (GTSPP) is a joint Intergovernmental Oceanographic Commission (IOC) and World Meteorological Organization (WMO) programme to develop and maintain a global ocean Temperature-Salinity resource with data that are both up-to-date and of the highest quality[2]. The four primary objectives of GTSPP are: a) Provide a timely and complete data and information base of ocean temperature and salinity profile data, b) Implement data flow monitoring system for improving the capture and timeliness of real-time and delayed-mode data, c) Improve and implement agreed and uniform quality control and duplicates management systems, and d) Facilitate the development and provision of a wide variety of useful data analyses,...
Tipo: Report
Palavras-chave: Salinity profiles; Water temperature data; Global observing systems; Salinity.
Ano: 2011
URL: http://hdl.handle.net/1834/4468

La subcorriente ecuatorial: características oceanográficas alrededor de las Islas Galápagos
Provedor de dados: 20
Autores: Lucero, M.
El propósito de este trabajo consiste en presentar nuevas evidencias de la presencia de esta subcorriente, que pasa a través de las Islas Galápagos y que sus aguas han sido observadas hasta los 82°W (frente al Golfo de Guayaquil), este trabajo esta basado en mediciones directas de corrientes efectuadas a bordo del BAE ORION, en un crucero oceanográfico desarrollado entre abril y mayo del 2002.
Tipo: Journal Contribution
Palavras-chave: Temperature; Salinity; Surface salinity; Upwelling; Equatorial undercurrents; Cruises; Temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_7657; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2004
URL: http://hdl.handle.net/1834/2375

Variación de la salinidad y su relación con la distribución por talla del ostión de mangle, Villa Clara, Cuba
Provedor de dados: 20
Autores: Betanzos Vega, A.; Siam Lahera, C.; Arencibia Carballo, G.
A partir de información antecedente y de muestreos realizados en el año 2006 y 2008,  se determinan incrementos de la salinidad en aguas al norte de la provincia de Villa  Clara, Cuba; realizándose comparaciones entre esta variable y la talla de ostiones  (Crassostrea rhizophorae, Guilding 1828) en la Bahía Sagua la Grande. Se encontró  diferencia significativa entre la salinidad por estaciones, y entre la talla media de  ostiones por sitios de muestreo (ANOVA, p &lt; 0,05). Se presentan relaciones inversas  estadísticamente significativas entre la salinidad y la talla media de los ostiones: en  febrero de 2006, R2 = 0,91; α &lt; 0,05 y en enero de 2008, R2  = 0,94; α &lt; 0,05. La  distribución horizontal de la salinidad, incide en la estructura de tallas...
Tipo: Journal Contribution
Palavras-chave: Mangrove swamps; Salinity; Mangrove swamps; Salinity; Http://aims.fao.org/aos/agrovoc/c_4577; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2010
URL: http://hdl.handle.net/1834/4091

Características físico-químicas de las aguas del Paso Drake durante el verano 1988
Provedor de dados: 20
Autores: Allauca, S.; Valencia Trejo, M.
Un análisis de parámetros físicos y químicos se realizó en el Paso Drake en base a datos obtenidos durante el trayecto del BAE ORION hacia y desde la Península Antártica. La investigación efectuada en esta área forma parte de la Primera Expedición Ecuatoriana a la Antártica, realizada durante el verano 1988. Los datos de temperatura medidos con probetas de XBT, proporcionaron una clara visión de la estructura térmica de cada sección hasta los 500 metros. Se determinaron las posiciones de los diferentes Frentes y Zonas tanto por las condiciones subsuperficiales como por sus expresiones superficiales. La presencia de un anillo o masa de agua subsuperficial relativamente fría dentro de la Zona del Frente Polar permite pensar que corresponde a Agua Superficial...
Tipo: Journal Contribution
Palavras-chave: Chemical oceanography; Surface water; Surface temperature; Air temperature; Salinity; Nutrients (mineral); Polar fronts; Chemical oceanography; Surface water; Air temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_1516; Http://aims.fao.org/aos/agrovoc/c_25317; Http://aims.fao.org/aos/agrovoc/c_230; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1989
URL: http://hdl.handle.net/1834/3874

Seasonal Variatrion of Cymodocea Nodeosa in the Ghar el Melh Lagoon (Tunisia) with reference to insolation, temperature and salinity effects
Provedor de dados: 20
Autores: Sghaier, Y. R.; Zakhama-Sraieb, R.; Charfi-Cheikhrouha, F.
Two sampling stations were selected in order to assess the response of the seagrass to lagoon conditions. Leaf growth was estimated using Zieman method and rhizome production was evaluated by marking rhizome terminals. The vegetative development of C. nodosa inside the lagoon at the limit of its distribution is different from that observed close to the communication channel with the sea. The growth of C. nodosa show a clear unimodal cycle in the two stations reaching maximum leaf development in summer. Shoot density decreased from 915 to 500 shoot m-2 from the communication channel toward the lagoon. The average total biomass varied between 241.6 ± 34 g DW m-2 and 413.8 ± 46 g DW m-2. Leaf plastochrone interval varied seasonally with an annual average of...
Tipo: Journal Contribution
Palavras-chave: Salinity; Biomass; Seagrass; Lagoons; Water temperature; Lagoons; Salinity; Biomass.
Ano: 2012
URL: http://hdl.handle.net/1834/5305

Efecto de los ácidos grasos altamente insaturados (HUFA) en la reproducción del ostión de placer Crassostrea corteziensis (Hertlein, 1951)
Provedor de dados: 20
Autores: Hurtado, M.
La tolerancia y supervivencia de los camarones a las variaciones de salinidad están estrechamente relacionadas con los mecanismos de osmorregulación. Diversos trabajos en peces y mamíferos, describen la importancia de los ácidos grasos altamente insaturados (HUFA) en la permeabilidad de las membranas y otros procesos relacionados con la osmorregulación. Por lo anterior, en la presente tesis se evaluó la posibilidad de modular la respuesta osmorreguladora a corto y largo plazo, a través de la suplementación de alimento peletizado con dos diferentes niveles de HUFA (0 y 50%), en juveniles de camarón blanco Litopenaeus vannamei. En el primer experimento  (exposición aguda), los camarones (3.5 ± 0.5 g) se cultivaron a 30 ups por tres semanas, durante las...
Tipo: Theses and Dissertations
Palavras-chave: 1030; Salinity; Crustacean culture; Fatty acids; Fatty acids; Salinity; Crustacean culture; Http://aims.fao.org/aos/agrovoc/c_2818; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_1985.
Ano: 2004
URL: http://hdl.handle.net/1834/3685

Caracterización de la temperatura superficial del mar en los sitios de visita turística de la Reserva Marina de Galápagos
Provedor de dados: 20
Autores: Ortega, J.; Jara, V.; Alvarez, M.; Rentería, W.
El presente estudio consiste en un análisis descriptivo de los parámetros físicos (temperatura-salinidad) y corrientes superficiales y sub-superficiales, obtenidos en los sitios de visita turística de la Reserva Marina de Galápagos (RMG), los cuales describen las condiciones oceanográficas de dichos lugares. Estos datos han sido procesados con el propósito de establecer una caracterización de la temperatura superficial del mar en estos sitios, y sus variaciones a lo largo del 2011. Esta caracterización será soportada con el uso de los datos del Análisis Operacional de Temperatura Superficial del Mar y de Hielo Marino (UKMO-L4HRfnd-GLOB-OSTIA) a fin de conseguir una continuidad en la serie de tiempo anual.
Tipo: Journal Contribution
Palavras-chave: Temperature; Salinity; Surface temperature; Sea ice; Marine parks; Surface currents currents.
Ano: 2012
URL: http://hdl.handle.net/1834/4658

Global Temperature-Salinity Profile Programme (GTSPP) - Overview and Future
Provedor de dados: 20
Autores: Wilson, J.R.
This document is directed to the scientific research community and users of operational ocean data. It is also intended to provide an example and be a source of information to programmes such as the Global Ocean Observing System (GOOS) for developing and implementing end-to-end data management systems. The document is also directed towards Member States of IOC. It discusses how Member States can make contributions and how they can benefit from the GTSPP.
Tipo: Book
Palavras-chave: Oceanography; Temperature data; Temperature measurement; Ocean circulation; Salinity; Salinity data; Salinity measurement; Salinity profiles; Salinity scales; Salinity; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1998
URL: http://hdl.handle.net/1834/2796

Spatio-temporal variations of zooplankton community in the hypersaline lagoon of Bardawil, North Sinai, Egypt
Provedor de dados: 20
Autores: Mageed, A.A.A.
Bardawil Lagoon is a shallow oligotrophic hypersaline lake, located at the northern periphery of Sinai peninsula-Egypt, connected to SE Mediterranean Sea through two main openings known as Boughazes. Distribution of zooplankton in Bardawil Lagoon during 2004 was studied, not only in space and time but also with reference to species assemblages and environmental factors. Copepoda, Protozoa, and Mollusca were dominating the lagoon zooplankton community during the period of study with 58 identified forma. Zooplankton stock peaked during August and October with severe depletion in spring. Spatially, the maximum density occurred near the sea opening I.  The lowest density and species richness were noticed at stations with high salinity. The community...
Tipo: Journal Contribution
Palavras-chave: Hydrobiology Studies; Zooplankton; Salinity; Lagoons; Zooplankton; Salinity; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2006
URL: http://hdl.handle.net/1834/1456

Caracterização da hidrodinâmica e do estado trófico da lagoa de Bilene, Sul de Moçambique
Provedor de dados: 20
Autores: André, E.
Foi observado um evento de afloramento de algas nocivas e morte maciça de peixes e interrupção temporária das actividades turísticas na lagoa de Bilene, Moçambique em 2007. O presente estudo pretende fazer uma caracterização da hidrodinâmica e do estado trófico desta lagoa e compreender processos que resultam em afloramentos de algas tóxicas. Entre Julho de 2010 e Agosto de 2011, foram realizados oito campanhas de colheitas de dados de CTD incluindo a concentração de oxigénio em água,cobrindo um ciclo anual. Os resultados revelaram que a Lagoa de Bilene contem duas sub-bacias, uma a sul, maior em extensão geográfica mas menos profunda, e uma bacia a norte, com menor extensão geográfica mas mais profunda. As massas de água tem uma caracterização típica com...
Tipo: Journal Contribution
Palavras-chave: Eutrophication; Fertilization (biological); Salinity; Oxygen; Temperature; Oxygen deficiency; Temperature.
Ano: 2012
URL: http://hdl.handle.net/1834/5143

Cyanobacterial occurrence and diversity in seagrass meadows in coastal Tanzania
Provedor de dados: 20
Autores: Lyimo, T.J.; Hamisi, M.I.; Muruke, M.H.S.
We report on the occurrence and diversity of cyanobacteria in intertidal seagrass meadows at Ocean Road and Mjimwema, Dar es Salaam, Tanzania. Nutrients, temperature and salinity were measured as comparative environmental factors. A total of 19 different cyanobacteria taxa were encountered, out of which eight were found exclusively in Mjimwema, four exclusively in Ocean Road and seven were common to both sites. Oscillatoria, Lyngbya and Spirulina were the dominant cyanobacterial genera. Cyanobacterial coverage was higher in Mjimwema (31–100%) than in Ocean Road (0–60%). The levels of nutrients in tidal pool waters at Ocean Road ranged from 0.45–1.03 ìmol NO3 -N/l, 0.19–0.27 ìmol NO2 -N/l and 0.03–0.09 ìmol PO4 -P/l. At Mjimwema the nutrient concentration...
Tipo: Journal Contribution
Palavras-chave: Sea grass; Salinity; Temperature; Bacteria; Nutrients; Salinity; Temperature; Http://aims.fao.org/aos/agrovoc/c_5274; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_7657.
Ano: 2004
URL: http://hdl.handle.net/1834/1137

Modeling laboratory culture of Gracilaria verrucosa (Hudson) Papenfuss according to nutrients concentrations and salinities levels
Provedor de dados: 20
Autores: Mensi, F.; Ksouri, J.; Seale, E. G.; Romdhane, M.S.
L'exploitation des algues rouges appartenant au genre Gracilaria pour l'extraction de l'agar a considérablement augmenté au cours des dernières décennies. En Tunisie Gracilaria verrucosa (Hudson) Papenfuss 1950 (Rhodophyta), est candidate pour la culture dans la lagune de Bizerte (Nord de la Tunisie) où ne pousse que sur une courte période de l’année. Ainsi, le but de cette étude est de recueillir des informations de base sur sa croissance dans cette région. Les effets de la salinité des sources d’azote et du phosphore ainsi que leurs concentrations sur la croissance de cette algue ont été étudiés à l'échelle de laboratoire en utilisant la méthodologie de surface des réponses. Afin de déterminer les interactions entre les variables et les niveaux optimaux...
Tipo: Journal Contribution
Palavras-chave: Algae; Ammonium; Red algae; Salinity; Growth; Nitrates.
Ano: 2011
URL: http://hdl.handle.net/1834/4734

Estudio de la calidad de las aguas costeras insulares en la Provincia de Galápagos
Provedor de dados: 20
Autores: Rodríguez de Morán, A.; Valencia, M.
El presente trabajo se orienta para conocer la calidad actual de las aguas costeras insulares de cinco Bahías del Archipiélago: Naufragio, Academia, Darwin, Puerto Velasco Ibarra y Puerto Villamil.
Tipo: Journal Contribution
Palavras-chave: Water quality; Chemical composition; Salinity; Water temperature; Coastal waters; Oceanic islands; Water quality; Chemical composition; Water temperature; Salinity; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_1794; Http://aims.fao.org/aos/agrovoc/c_16063; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 2000
URL: http://hdl.handle.net/1834/2241

Factors controlling the total alkalinity in the Arabian Sea and Red Sea
Provedor de dados: 20
Autores: Elageed, Salma.
Based on data obtained during the Geochemical Ocean Section Study (GEOSECS)1977, Mer Rouge (MEROU) 1982, and US Joint Global Ocean Flux (JGOFS)1995 studies we have analyzed the processes controlling the total alkalinity (TA) of the whole water column in the Arabian Sea and the Red Sea. The main processes important for the TA variability in area of study are salinity variations, soft tissue production, calcium carbonate formation and dissolution, and sedimentation. For the subsurface waters different processes dominate in the different basins. Regarding spatial variations in surface TA, maximum values occur in the Red Sea and minimum in the upwelling region along the Omani coast in the Arabian Sea. These variations are mainly associated with physical...
Tipo: Theses and Dissertations
Palavras-chave: Alkalinity; Salinity; Sedimentation.
Ano: 2010
URL: http://hdl.handle.net/1834/4549

Short term variations of zoo plankton community in the West Naubaria Canal, Alexandria, Egypt
Provedor de dados: 20
Autores: Abdel-Aziz, N.E.
The variations of zooplankton structure and abundance were studied at short time intervals in the northern part of the West Naubaria Canal, near the sea side, based on weekly sampling from May 2002 to May 2003 .The community represented high species richness (120 species), and relatively low population density ( annual average 31340 organisms/m.3). Freshwater forms were the major representatives (68 species) of the community, including the sea side station. However, several marine species were reported inside the canal at a long distance from the sea. The community structure showed wide weekly variations (4-29 species), while between stations the differences were small.  Relative to salinity in the canal, diversity index sustained the highest value (annual...
Tipo: Journal Contribution
Palavras-chave: Naubaria Canal; Salinity; Zooplankton; Zooplankton; Salinity; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2005
URL: http://hdl.handle.net/1834/1300

Oceanographic conditions at the southern end of the argentine continental slope
Provedor de dados: 20
Autores: Guerrero, R.A.; Baldoni, A.G.; Benavides, H.R.
The characteristics of the upper Antartic Intermediate water (AAIW) entering the Southern Atlantic are described on the base of oceanographic data collected from four late austral winters (1978-1980-1994-1995). The upper 500 meters regime along the shelf break and around Malvinas Islands (48° to 55° S) is analyzed. In particular, the 1994 horizontal distribution of temperature, salinity and density was mapped in order to show the extreme winter pattern of these parameters. Three salinity sections crossing the water flow direction in the Malvinas Channel (South to the islands) were selected to describe the vertical stratification 1995 and 1995. Horizontal and vertical distribution of chlorophyll a from the 1995 cruise is presented as reference data,...
Tipo: Journal Contribution
Palavras-chave: Shelf edge; Continental slope; Salinity; Temperature; Chlorophylls; Water circulation; Water circulation; Chlorophylls; Salinity; Temperature; Http://aims.fao.org/aos/agrovoc/c_8314; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_7657.
Ano: 1999
URL: http://hdl.handle.net/1834/2575

Altas temperaturas estacionales del agua como condición disturbadora de las macroalgas del Parque Nacional Tairona, Caribe colombiano: una hipotesis
Provedor de dados: 20
Autores: Bula-Meyer, G.
Con base en observaciones de campo y en mediciones de los factores temperatura, salinidad, nutrientes, transparencia y movimiento del agua, se analizó cada uno de éstos con el fin de conocer el factor más importante en el control del crecimiento y productividad de las macroalgas del Parque Nacional Tairona en la costa Caribe de Colombia. Se hipotetiza que el factor clave que regula estos aspectos fisiológicos de las macroalgas del Parquees la temperatura. Su ascenso por encima de los 26°C, como resultado de la declinación del afloramiento y de otros fenómenos oceanográficos-meteorológicos, produce la disturbancia (remoción de biomasa) de las macroalgas que se observa anualmente en la estación húmeda mayor.
Tipo: Journal Contribution
Palavras-chave: Temperature; Salinity; Nutrients (mineral); Temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_7657; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1990
URL: http://hdl.handle.net/1834/3882

Zooplancton en el estuario interior del Golfo de Guayaquil, durante mayo del 2001
Provedor de dados: 20
Autores: Naranjo, Ch.
Los objetivos del estudio son conocer la situación actual del zooplancton con la finalidad de conocer la composición, distribución y abundancia de las comunidades del zooplancton, resaltando las áreas de mayor productividad en el segundo eslabón de la cadena alimentaria. Establecer especies dominantes en la comunidad de quetognatos y su relación con los parámetros físicos en el estuario interior del Golfo de Guayaquil.
Tipo: Journal Contribution
Palavras-chave: Composition; Distribution; Biomass; Zooplankton; Salinity; Abundance; Biological production; Estuaries; Estuarine organisms; Biological production; Estuaries; Distribution; Biomass; Zooplankton; Salinity; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2002
URL: http://hdl.handle.net/1834/2271

Características hidroquímicas de las Bahías Chile, Almirantazgo y Fildes, Islas Shetland del Sur. Verano austral 1990/91
Provedor de dados: 20
Autores: Valencia T., M.; Rodríguez de Moran, A.; Vega, M.
Se presentan las características hidroquímicas de las aguas de las Bahías Chile, Almirantazgo y Fildes, en las Islas del Archipiélago Shetland del Sur, en base a la distribución horizontal y vertical de los parámetros: Oxígeno disuelto, salinidad y micronutrientes inorgánicos (fosfato, nitrito, nitrato y silicato). En forma general, se observa aguas bién oxigenadas, con salinidad relativamente baja, especialmente en la capa superficial, parámetro influenciado por el aporte de aguas de deshielo de los glaciares cercanos. Igualmente alta concentración relativa de micronutrientes inorgánicos, con escasa estratificación de los mismos.
Tipo: Journal Contribution
Palavras-chave: Water analysis; Vertical distribution; Horizontal distribution; Dissolved oxygen; Salinity; Nutrients (mineral); Dissolved oxygen; Water analysis; Salinity; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1993
URL: http://hdl.handle.net/1834/3768

Respuesta de la diatomea Actinocyclus normanii Hustedt, a las variaciones en la densidad celular inicial, concentración de salinidad, silicato y fosfato en condiciones de laboratorio
Provedor de dados: 20
Autores: Sánchez, G.E.; Morales, E.; Guillot, G.; Vidal, L.A.
Microalgae are important for the restoration of coastal lagoon ecosystems affected by human activities because they are useful indicators of variations of salinity and levels of nutrients such as silicate and phosphate in the water column. With the centric diatom Actinocyclus normanii from Ciénaga Grande de Santa Marta (Colombian Caribbean) we conducted several experiments to evaluate the responses of this species at three levels of salinity (0, 15 and 25) and two initial densities (100 and 800 cells·ml-1) to nine treatments combining several concentrations of phosphate (0, 1,5 and 3,0 µmol·l-1) and silicate (10, 150 and 300 µmol·l-1). All treatments were maintained with light intensity of 57,9 mE-2·seg-1, photoperiod of 12:12 hrs, temperature between 22...
Tipo: Journal Contribution
Palavras-chave: Phosphates; Salinity; Silicates; Phosphates; Salinity; Silicates; Http://aims.fao.org/aos/agrovoc/c_35986; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_28560.
Ano: 2003
URL: http://hdl.handle.net/1834/3124

Combined Effects of Temperature and Salinity on Larval Development of the Mangrove Crab Parasesarma catenata Ortman, 1897 (Brachyura: Sesarmidae)
Provedor de dados: 20
Autores: Mwaluma, J.; Nogueira Mendes, R.; Raedig, C.; Emmerson, W.; Paula, J.
The larval stages of the mangrove crab Parasesarma catenata were reared in the laboratory from eggs of females collected in the Mgazana estuary, South Africa. Survival and duration of larval stages were tested for the combined effects of temperature and salinity in a factorial design experiment, using three females each with two replicates of 15 larvae per combination. Combinations were made from five temperature (15, 20, 25, 30 and 35 ºC) and four salinity values (15, 25, 35 and 45 ‰). Results were tested by ANOVA and multiple regression was applied to generate contour models by polynomial equation. It was found that P. catenata larvae develop optimally in near to seawater salinity at a temperature of around 25 ºC. These results support the assumption...
Tipo: Journal Contribution
Palavras-chave: Mangroves; Crab culture; Salinity; Temperature.
Ano: 2003
URL: http://hdl.handle.net/1834/956

Estructura termal y distribución superficial del clorofila "a" en el Paso Drake durante el verano austral de 1989-1990
Provedor de dados: 20
Autores: Zambrano Q., E.; Allauca, S.; Arcos, F.
En el verano austral de 1990, durante la II Expedición Ecuatoriana a la Antártica a bordo del B/I ORION se efectuaron dos secciones (ida y retorno) en el Paso Drake, en las cuales se realizaron un total de 28 lances de XBT y el muestreo horario de parámetros superficiales como temperatura del mar, del aire, salinidad, vientos y clorofila "a". Los resultados obtenidos en ambas secciones permiten observar la variación de estos parámetros, en el transcurso aproximado de un mes, en el Paso Drake durante aquella época. Claramente, en las secciones verticales de temperatura, se observa la presencia de los Frentes Polar y Subantártico, dando lugar a una marcada convergencia Antártica. En el transcurso de casi un mes entre las dos secciones, se puede observar el...
Tipo: Journal Contribution
Palavras-chave: Surface temperature; Air temperature; Salinity; Winds; Chlorophylls; Winds; Air temperature; Salinity; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_8401; Http://aims.fao.org/aos/agrovoc/c_230; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 1990
URL: http://hdl.handle.net/1834/3729

Influence of salinity variations on zooplankton community in el-mex bay, alexandria, egypt
Provedor de dados: 20
Autores: Zakaria, H.Y.; Radwan, A.A.; Said, M.A.
El-Mex Bay receives a heavy load of waste waters (7×109 m3/year) both directly from industrial outfalls and indirectly from Lake Maryuit via El-Mex Pumping Station. Zooplankton samples were collected bimonthly from seven stations during the period March 2005 to January 2006 to illustrate the influence of salinity variations on the abundance and community structure of zooplankton in El-Mex Bay waters. Based on the salinity values, four water types are identified: the mixed land drainage (L) of salinity &lt; 10ppt, mixed water (M) of salinity range 10 to 30ppt, diluted sea water (D) of salinity range 30 to 38.5 ppt and Mediterranean Sea water (S) of salinity &gt; 38.5. The highest zooplankton standing crop (106.6×103 ind/m3) was recorded in the mixed land...
Tipo: Journal Contribution
Palavras-chave: Field Study; Zooplankton; Salinity; Zooplankton; Salinity; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2007
URL: http://hdl.handle.net/1834/2211

The GTSPP Project: Overview and Options for the Future
Provedor de dados: 20
Autores: Keeley, R.
The Global Temperature-Salinity Profile Programme (GTSPP) is a joint programme of the IOC Committee on International Oceanographic Data and Information Exchange (IODE) and the Joint IOC/WMO Committee on the Integrated Global Ocean Services System (IGOSS). IODE and IGOSS are technical committees of the Intergovernmental Oceanographic Commission (IOC) and the World Meteorological Organization (WMO). Development of the GTSPP (then called the Global Temperature-Salinity Pilot Project) began in 1989. The short-term goal of the GTSPP was to respond to the needs of the Tropical Ocean and Global Atmosphere (TOGA) Experiment and the World Ocean Circulation Experiment (WOCE) for temperature and salinity data. The longer-term goal was to develop and implement an...
Tipo: Report
Palavras-chave: Temperature; Salinity; Oceanography.
Ano: 2000
URL: http://hdl.handle.net/1834/1806

Estimación de los flujos mar-atmósfera de CO2 y la variabilidad de la clorofila-a en el Mar Argentino.
Provedor de dados: 20
Autores: Luz Clara, M.
En ocho campañas oceanográficas realizadas entre los años 2000 y 2006 en el Mar Patagónico se obtuvieron datos superficiales de temperatura y salinidad, presiones parciales de CO2 (pCO2) en el mar y la atmósfera, fluorescencia (utilizada como indicador de biomasa fitoplanctónica), clorofila-a (Cl-a) y vientos, entre otros. La magnitud y dirección del flujo de CO2 se encuentran gobernadas por la diferencia entre las pCO2 de la superficie del mar y del aire (?pCO2), la solubilidad del gas y la velocidad del viento. Los flujos mar-atmósfera de CO2 conforman una parte esencial en el ciclo global del carbono. En este trabajo se realiza una comparación entre los flujos de CO2 y la intensidad del viento con datos in-situ y satelitales. Los flujos se calculan...
Tipo: Theses and Dissertations
Palavras-chave: Oceanographic surveys; Salinity; Temperature; Chlorophylls; Air-sea interaction; Oceanic fronts; Climatology.
Ano: 2008
URL: http://hdl.handle.net/1834/4207

Variación interanual del mesozooplancton en la plataforma bonaerense en primavera: introducción de nuevas metodologías para su análisis
Provedor de dados: 20
Autores: Di Mauro, R.
The distribution and abundance of mesozooplankton (specially copepod, cladoceran and appendicularian species) of the Buenos Aires shelf obtained in spring, during the years 2002, 2003 and 2004, were analysed. A small bongo net provided with 67 and 220 µm meshes, was employed in order to obtain a complete representation of the size spectrum of the mesozooplankton. The analysis included both the traditional optical method and the a new automatic image analysis (ZooImage). The results were related with the oceanographic conditions, which were, in general similar to the mean conditions for the study area. The finer mesh (67 µm) allowed a more accurate estimation of the abundance and biomass of small copepod species ( 1mm total length), producing the tick mesh...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Abundance; Biomass; Annual variations; Fish larvae; Imaging techniques; Oceanographic data; Environmental conditions; Salinity; Temperature; Water masses.
Ano: 2011
URL: http://hdl.handle.net/1834/4204

Investigation on possible chemical pollution of the BouGhraa lagoon south of Tunisia by chemical wastes
Provedor de dados: 20
Autores: Farhat, F.; Ben Aoun, Z.; Chouba, L.; Hadj Ali, M. S.
La mer de BouGhrara, un milieu quasi-lagunaire de cinquante milles hectares environ, a contribué d’une manière remarquable à la production halieutique Tunisienne jusqu’au 1992  4.786 tonnes, année à partir de laquelle cette production n’a cessé de décroître (1.118 tonnes en 2002). Par ailleurs le premier projet industriel d’aquaculture marine y a également vu le jour, atteignant une production aquacole en cages flottantes de 252 tonnes en 1990. Malheureusement cette activité a cessé en 1995, après une dizaine d’années et la société  qui assurait cette production a cessé ses activités et les quelques cages ont été déplacées de la lagune vers le bassin du port de Zarzis à la recherche de conditions environnementales meilleures. Plusieurs raisons ont été...
Tipo: Journal Contribution
Palavras-chave: Chemical pollution; Depletion; Eutrophication; Lagoon fisheries; Organic matter; Pollution effects; Salinity; Temperature; Waste disposal; Acidity.
Ano: 2007
URL: http://hdl.handle.net/1834/4249

Interrelaciones entre salinidad y temperatura en la Bahía de Santa Marta
Provedor de dados: 20
Autores: Müller, K.
La salinidad y la temperatura en la bahía de Santa Marta se ven afectadas, durante una época del año, por los vientos alisios que entran a la bahía en dirección oeste y que influyen en la distribución de las capas de agua de la superficie y el fondo. El agua es además afectada en la época de lluvias por el Río Manzanares que desemboca en esta bahía.
Tipo: Journal Contribution
Palavras-chave: Oceanography; Temperature; Salinity; Oceanography; Temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_12889; Http://aims.fao.org/aos/agrovoc/c_7657; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1979
URL: http://hdl.handle.net/1834/3954

Variaciones interanuales (1995-2000) de la temperatura y la salinidad registradas en los meses de enero en el golfo San Jorge y aguas adyacentes (43°S-47°S).
Provedor de dados: 20
Autores: Louge, E.; Reta, R.; Santos, B.A.; Hernandez, D.R.
Temperature and salinity interannual variations are analyzed south ofthe hake (Merluccius hubbsi)spawning grounds area, in the San Jorge Gulf and adjacent waters Argentine Sea, SW Atlantic. The study period comprises the months of January 1995-2000. Results of cruises carried out on board of INIDEP research vessels to assess hake juveniles were studied. Statistically significant increase of temperature from 1997 was observed. Change trends over a period of 20 years at a global climate scale are discussed. Mean salinity did not show variations except for 2000 when it was slightly higher probably due to the scarce influence of the Patagonian Current in the area. Temperature and salinity fields showed a horizontal gradient south of the Gulf (thermohaline...
Tipo: Journal Contribution
Palavras-chave: Salinity; Temperature; Shelf fronts; Thermocline; Environmental factors; Nursery grounds; Climatic changes; Environmental factors; Salinity; Temperature; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_7657; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 2004
URL: http://hdl.handle.net/1834/1500

An Ocean Theme for the IGOS Partnership
Provedor de dados: 20
The Integrated Global Observing Strategy Partnership (IGOS-P) established, in 1999, a thematic approach to the implementation of the IGOS. Recognising that other themes will emerge, the “Ocean Theme” was chosen to be the “pathfinder” in this approach and an Ocean Theme Team was assembled to formulate guidance. One goal of the Ocean Theme Team is to consider and study the full range of current and planned observations, while identifying potential gaps in future observations that might compromise ocean observational records. This document presents a proposed set of long-term ocean observations and identifies a number of challenges for the improvement of knowledge about both the oceans and observing techniques. The overall strategy is to create an observing...
Tipo: Proceedings Paper
Palavras-chave: Oceanography; Surface temperature; Wind vectors; Sea ice; Salinity; Salinity; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2000
URL: http://hdl.handle.net/1834/2631

Un système d'indicateurs de durabilité des pêcheries côtières comme outil de gestion intégrée des ressources halieutiques sénégalaises
Provedor de dados: 20
Autores: Thiao, Djiga.
Cette thèse est axée sur une analyse de la durabilité des pêcheries côtières qui aboutit  sur la proposition d’un système d’indicateurs comme  outil de gestion intégrée des ressources halieutiques sénégalaises.  L’objectif est d’encourager  une meilleure gouvernance de ces  systèmes halieutiques et côtiers dont l’exploitation est caractérisée par la complexité, la multiplicité et l’interactivité de plusieurs facteurs écologiques, économiques et sociaux. La stratégie adoptée est fondée sur l’approche systémique à travers  une vision multidimensionnelle et multi-acteurs  s’appuyant  sur le modèle PER (pression-état-réponse).  Le diagnostic  reflète  une détérioration générale de l’état  des écosystèmes côtiers  nécessitant  des mesures d’ajustement de la...
Tipo: Theses and Dissertations
Palavras-chave: Sustainable fishing; Inshore waters; Coastal zone management; Fisheries resources; Ecosystem management; Hydrology; Phytoplankton; Flora; Coastal environment; Sustainable development; Zooplankton; Ecology; Temperature; Salinity; Tourism; Rivers; Upwelling.
Ano: 2009
URL: http://hdl.handle.net/1834/5002

Preliminary study on hatching of rotifers (Brachionus plicatilis) and copepods (Cyclopoida): response to flooding and organic fertilisation
Provedor de dados: 20
Autores: Mwandya, A.W.; Kyewalyanga, M.S.; Valdenberg, A.
The effect of water flooding, organic fertiliser application and salinity manipulation in stimulating the hatching of rotifer resting eggs was investigated during the dry season (in August/September 1999) in simulation tanks and earthen ponds at Makoba, Zanzibar. The majority of hatched zooplankton included rotifers, identified as Brachionus plicatilis, and other zooplankton such as copepods and protozoa were present in small numbers. The number of rotifers hatched in simulation treatments with low salinity was higher than the values in treatments containing undiluted seawater. Up to 22 ± 1.5 (mean ± SE) rotifers/ml were counted in treatments with low salinity, whereas only a maximum of 13 ± 1. rotifers/ml were found in high-salinity treatments. On the...
Tipo: Journal Contribution
Palavras-chave: Eggs; Resting spores; Salinity; Flooding; Hatching; Eggs; Salinity; Fertilization; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_2863.
Ano: 2004
URL: http://hdl.handle.net/1834/1093

Environmental Impact; In Osman Digna (SUAKIN)
Provedor de dados: 20
Autores: El hag, A ' Gadir.
Tipo: Report
Palavras-chave: Salinity; Air-water temperature difference; Winkler method; Sediments; Coral reefs.
Ano: 2007
URL: http://hdl.handle.net/1834/5093

Presencia de Limnoria sp., perforador marino de maderas en los principales puertos del Ecuador (Crustacea: Isopoda: Flabellifera)
Provedor de dados: 20
Autores: Torres, G.
El propósito de estas investigaciones, es contribuir al conocimiento sobre la presencia de Limnorias en los principales puertos del Ecuador, además evaluar el daño que ocasionan.
Tipo: Journal Contribution
Palavras-chave: Marine molluscs; Marine organisms; Geographical distribution; Oceanographic data; Environmental factors; Salinity; Temperature; Geographical distribution; Environmental factors; Salinity; Temperature; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_7657.
Ano: 1990
URL: http://hdl.handle.net/1834/2171

Monitoreo de las condiciones bio-oceanográficas en la I y II Regiones, año 2002
Provedor de dados: 20
Autores: Braun, M.; Reyes, H.; Valenzuela, V.; Castillo, J.; Osses, J.; Catasti, V.
El presente documento corresponde al pre-informe final del Proyecto FIP 2002-01 Monitoreo de las condiciones bio-oceanográficas fisico-químicas; la distribución geográfica y abundancia de huevos y larvas de los recursos anchoveta, sardina, jurel y caballa y su variabilidad estacional; y la distribución de los recursos detectados por medio de técnicas hidroacústicas en la I y II Regiones, registradas durante los cruceros estacionales de monitoreo MOBIO 0205, MOBIO 0209, MOBIO 0212 y MOBIO 301, realizados en otoño, invierno y primavera de 2002 y verano de 2003 respectivamente. Entrega además la serie de tiempo mensual generada producto de la ocupación de las estaciones costeras de vigilancia localizadas frente a los puertos de Mejillones, Iquique y Arica...
Tipo: Report
Palavras-chave: Physical oceanography; Water temperature; Salinity; Dissolved oxygen; Marine ecology; Seasonal variations; Echo surveys; Geographical distribution; Zooplankton; Physical oceanography; Water temperature; Dissolved oxygen; Geographical distribution; Zooplankton; Salinity; Marine ecology; Http://aims.fao.org/aos/agrovoc/c_5830; Http://aims.fao.org/aos/agrovoc/c_16063; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_4609.
Ano: 2004
URL: http://hdl.handle.net/1834/1728

Variabilidad oceanográfica en el Estrecho Bransfield asociada con el evento ENSO 1997-1998
Provedor de dados: 20
Autores: Martínez, R.
Dentro de las actividades científicas contempladas en la VII Expedición Ecuatoriana a la Antártida para enero de 1998 en Buque de Investigación de la Armada B/I Orión efectuó un crucero oceanográfico en el Estrecho Branfield. Se efectuaron 14 estaciones oceanográficas hasta 500 metros, se realizaron mediciones de corriente utilizando un perfilador acústico doppler. Tomando como referencia trabajos anteriores en el área en años sin influencia de eventos cálidos se compararon los parámetros físicos. Luego del análisis se concluye que el evento ENSO 97-98 tuvo repercusiones evidentes en el área de estudio manifestada en dos aspectos básicos: El incremento de la temperatura y la disminución de la salinidad a nivel superficial. Esta variación habría generado un...
Tipo: Journal Contribution
Palavras-chave: Variability; Thermohaline circulation; Salinity; Water masses; El Nino phenomena; Cruises; Research vessels; Salinity.
Ano: 1998
URL: http://hdl.handle.net/1834/3838

Estudio químico de las masas de aguas del Pacífico Sudeste (Ruta Guayaquil-Valparaíso), durante un período del evento "El Niño" 1997-1998
Provedor de dados: 20
Autores: Burgos, L.
Durante la séptima expedición Ecuatoriana a la Antártida (diciembre, 1997 y Marzo, 1998), a bordo del B/I ORION, se realizó investigación oceanográfica en el trayecto Guayaquil-Valparaíso, los días 11 al 19 de diciembre, se colectaron muestras de agua en 14 estaciones para el análisis de nutrientes, oxígeno, temperatura, salinidad, y parámetros biológicos además se recolectó información meteorológica. La información química obtenida de nutriente (Nitrato, silicato y fosfato) y oxígeno disuelto fue relacionada con la temperatura y correlacionada con los diagramas T/S en el ámbito de estudio. Se elaboraron gráficos de nutriente y oxígeno con las masas de agua, estableciendo rangos asociados a cada masa de agua previamente identificada en los diagramas T/S....
Tipo: Journal Contribution
Palavras-chave: Chemical oceanography; Water masses; El Nino phenomena; Nutrients (mineral); T/S diagrams; Water temperature; Salinity; Meteorological data; Dissolved oxygen; Cruises; Water temperature; Dissolved oxygen; Chemical oceanography; Salinity; Meteorological data; Http://aims.fao.org/aos/agrovoc/c_16063; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_1516; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_34149.
Ano: 1998
URL: http://hdl.handle.net/1834/2196

GTSPP real-time quality control manual
Provedor de dados: 20
This manual has been produced within the context of the Global Temperature Salinity Pilot Project (GTSPP). Because of the work of assuring the quality of data handled by the Project is shared amongst data centres, it is important to have both consistent and well documented procedures. This manual describes the means by which data quality is assessed and the actions taken as a result of the procedures.
Tipo: Report
Palavras-chave: Temperature; Salinity.
Ano: 1990
URL: http://hdl.handle.net/1834/4331

Esquemas de distribución de esponjas arrecifales (Porifera) del noroccidente del Golfo de Urabá, Caribe sur, Colombia
Provedor de dados: 20
Autores: Valderrama, D.; Zea, S.
The North-West of Urabá Gulf in the Southern Caribbean supports a variety of coral reef zones in conditions of high turbulence and fluctuating turbidity and salinity. Sponge composition and density were surveyed and their relationship with physical and structural features of the reef zones were analyzed. In total, 65 demosponges and 1 calcareous sponge species were encountered along belt transects  (20 m2) on 11 stations between 1 and 17 m in depth. Sponge density in Urabá tended to be higher than in other areas with water conditions optimal for coral reef development (i.e. Roncador, Serrana and Quitasueño remote oceanic atolls in the SW Caribbean, Colombia) due possibly to higher concentrations of organic suspended materials discharged from rivers....
Tipo: Journal Contribution
Palavras-chave: Sponges; Distribution; Salinity; Turbidity; Distribution; Turbidity; Sponges; Salinity; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_15043; Http://aims.fao.org/aos/agrovoc/c_7321; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2003
URL: http://hdl.handle.net/1834/3070

Les efflorescences phytoplanctoniques dans le golfe de gabes (Tunisie) au cours de dix ans de surveillance (1995-2005)
Provedor de dados: 20
Autores: Feki, W.; Hamza, A.; Bel Hassen, M.; Rebai, A.
Les données du Réseau National de Surveillance Phytoplanctonique ont été examinées dans le golfe de Gabes durant la période 1995-2005. Un intérêt particulier a été attribué au phénomène de bloom phytoplanctonique. En outre, nous avons examiné plus spécifiquement les variations spatio-temporelles des espèces responsables et les relations avec la variabilité des conditions abiotiques, essentiellement la température, la salinité et le pH. Les résultats ont montré que la période allant d’août à janvier, avec des pics en septembre et janvier, semble être propice à des efflorescences algales. Les dinoflagellés sont responsables de 89% des cas ; l’espèce Karenia selliformis détient à elle seule 64% des occurrences de ce phénomène. Les blooms de K. selliformis,...
Tipo: Journal Contribution
Palavras-chave: Algal blooms; Environmental conditions; Phytoplankton; Salinity; Ph; Phytoplankton; Algal blooms; Environmental conditions; Salinity.
Ano: 2008
URL: http://hdl.handle.net/1834/3702

The abundance, biomass and composition of pelagic ciliates in East African lakes of different salinity and trophy
Provedor de dados: 20
Autores: Yasindi, A. W.; Taylor, W. D.
Planktonic ciliates were studied in 17 tropical East African lakes of different salinity and trophic status. Oligotrichs (e.g., Strombidium, Strobilidium and Halteria) and scuticociliates (e.g., Cyclidium, Pleuronema, Cristigera), dominated the ciliate communities. Conductivity and trophic status were the most important environmental variables influencing the distribution of ciliate species in East African lakes. Herbivorous oligotrichs were important in oligotrophic and mesotrophic lakes, as they are in temperate and subtropical lakes, but their importance decreased with increasing chlorophyll a concentration and conductivity. On the other hand, the importance of scuticociliates (primarily bacterivores) increased with increasing chlorophyll a and...
Tipo: Proceedings Paper
Palavras-chave: Freshwater lakes; Abundance; Biomass; Pelagic environment; Salinity; Plankton; Community composition; Oligotrophic lakes; Aquatic communities; Regression analysis; Tropical lakes; Species diversity; Plankton; Freshwater.
Ano: 2006
URL: http://hdl.handle.net/1834/5311

Competition between the sibling species &lt;i&gt;Tisbe holothuriae&lt;/i&gt; and &lt;i&gt;T. battagliai&lt;/i&gt; (Harpacticoida)
Provedor de dados: 27
Autores: Bergmans, M.; Janssens, P.P.M.
The influence of the salinity on the performance of the sibling species &lt;i&gt;Tisbe holothuriae&lt;/i&gt; and &lt;i&gt;T. battagliai&lt;/i&gt; in pure and mixed cultures was studied, using laboratory stocks adapted to 32 pro mille for over 175 generations. Cohort studies show that &lt;i&gt;T. holothuriae&lt;/i&gt; has higher growth rates (R&lt;sub&gt;0&lt;/sub&gt; and r) at 32 pro mille, &lt;i&gt;T. battagliai&lt;/i&gt; at 20 pro mille. The latter's life cycle is much less affected by the difference in salinity. 'De Wit' replacement series were used to study competitive interactions. Without water renewal, &lt;i&gt;T. holothuriae&lt;/i&gt; eliminates its sibling species in less than 2 generations, apparently through chemical interference. With water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competition; Growth; Marine crustaceans; Phenology; Salinity; Sexual reproduction; Sibling species; Harpacticoida; Tisbe battagliai; Tisbe holothuriae.
Ano: 1988
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3121

Germinação e vigor de sementes de pau d’alho sob estresse salino
Provedor de dados: 190
Autores: Lopes, José Carlos; Freitas, Allan Rocha de; Beltrame, Rômulo André; Venancio, Luan Peroni; Manhone, Pedro Ramon; Silva, Fernanda Rodrigues Nunes e.
 A salinidade dos solos é um dos mais importantes fatores de estresse abiótico, afetando negativamente diversos aspectos da fisiologia e bioquímica das plantas. Este trabalho teve por objetivo avaliar o efeito do pré-condicionamento de sementes de Gallesia integrifolia sob de estresse salino com nitrato de potássio (KNO3) e nitropurinato de sódio (SNP). As sementes foram tratadas através do pré-condicionamento de imersão em soluções com cinco concentrações de KNO3 (0,0, 0,01, 0,1, 1 e 10 mg L-1) e de SNP (0, 0,01, 0,1, 1 e 10 mg L-1) por uma hora. Em seguida, as sementes foram distribuídas em folhas de papel filtro previamente umedecidos com soluções salinas em três potenciais osmóticos (0,0, -0,6 e - 1,2 MPa), sendo os rolos de papel mantidos em câmara de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sementes Florestais Gallesia integrifolia; Desenvolvimento inicial; Salinidade; Antioxidantes exógenos Initial development; Salinity; Exogenous antioxidants.
Ano: 2015
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/631

Salt tolerance and regulation of gas exchange and hormonal homeostasis by auxin-priming in wheat
Provedor de dados: 86
Autores: Iqbal,Muhammad; Ashraf,Muhammad.
The objective of this work was to assess the regulatory effects of auxin-priming on gas exchange and hormonal homeostasis in spring wheat subjected to saline conditions. Seeds of MH-97 (salt-intolerant) and Inqlab-91 (salt-tolerant) cultivars were subjected to 11 priming treatments (three hormones x three concentrations + two controls) and evaluated under saline (15 dS m-1) and nonsaline (2.84 dS m-1) conditions. The priming treatments consisted of: 5.71, 8.56, and 11.42 × 10-4 mol L-1 indoleacetic acid; 4.92, 7.38, and 9.84 × 10-4 mol L-1 indolebutyric acid; 4.89, 7.34, and 9.79 × 10-4 mol L-1 tryptophan; and a control with hydroprimed seeds. A negative control with nonprimed seeds was also evaluated. All priming agents diminished the effects of salinity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Hormonal balance; Plant growth regulators; Salinity; Seed priming; Stomatal regulation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000900004

Physiology and production of naturally-colored cotton under irrigation strategies using salinized water
Provedor de dados: 86
Autores: Soares,Lauriane Almeida dos Anjos; Fernandes,Pedro Dantas; Lima,Geovani Soares de; Brito,Marcos Eric Barbosa; Nascimento,Ronaldo do; Arriel,Nair Helena Castro.
Abstract: The objective of this work was to evaluate the effects of irrigation management strategies, using low (0.8 dS m-1) and high (9.0 dS m-1) salinity water, on the physiological processes, production variables, and fiber productivity of naturally-colored cotton (Gossypium hirsutum) genotypes during different phenological stages. Three naturally-colored cotton cultivars (BRS Rubi, BRS Topázio, and BRS Safira) were subjected to seven irrigation management strategies, in a 3x7 factorial arrangement, in a randomized complete block design with three replicates. Plants were cultivated in pots in a protected environment. Gas exchange, chlorophyll a fluorescence, fiber production, and productivity and yield variables were evaluated. Salt stress causes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypium hirsutum; Fiber productivity; Quantum yield; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600746

Responses of Conocarpus lancifolius to environmental stress: a case study in the semi-arid land of Kuwait
Provedor de dados: 85
Autores: Redha,A; Suleman,P; Al-Hasan,R; Afzal,M.
Cococarpus lancifolius Engl. grows wild in Djibouti, Somalia and East Africa, and South Asia. The species was introduced into Kuwait, where it is exposed to several stresses: oil pollution, salinity, high temperature and harsh climatic conditions. These conditions are prevalent in its semi-arid environment. In this study, the impact of salinity (2, 6 and 10%), temperature (20, 30 and 40 °C), polyethylene glycol (10, 30 and 60%) and drought has been investigated on C. lancifolius. Proline (Pro) accumulation (5.5 ± 0.03 µg/g dry weight; p=0.05-0.005), protein (16.47 ± 0.052 mg/g; p=0.001), free amino acids (10.92 ± 0.082 mg/g; p=0.006) and lipids (116.05 ± 2.17 µg/g; p=0.05) were measured in plants irrigated with 60% polyethylene glycol (PEG) for 6 days....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conocarpus lancifolius; Drought; Electron transport rate; Environmental stress; Salinity; Temperature; Photosynthesis.
Ano: 2012
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572012000200008

Sodium sulfate exposure slows growth of native pecan seedlings
Provedor de dados: 85
Autores: Moreno-Izaguirre,E; Ojeda-Barrios,D; Avila-Quezada,G; Guerrero-Prieto,V; Parra-Quezada,R; Ruiz-Anchondo,T.
Pecan [Carya illinoensis (Wanngenh) K. Koch] is one of the most important nut crops in arid and semiarid regions of Mexico. Here, most pecans are grown in saline soils having poor permeability which are further degraded by the use of low-quality irrigation water. Salinity adversely affects both pecan nut quality and yield. Little work has been done to explore the physiological effects of salinity on native pecan trees. Here we examine physiological changes determined by exposure of pecan seedlings to sodium sulfate (Na2SO4) at four concentrations: 1000, 2000, 3000 and 4000 mg/L applied twice weekly over a 70 d period. Control plants were similarly irrigated but with water free of Na2SO4. The aim was to identify and quantify the putative salinity damage to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Carya illinoensis; Chlorophyll; Proline; Salinity.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100012

Germination ecology of Rhynchosia capitata: an emerging summer weed in Asia
Provedor de dados: 87
Autores: Ali,H.H.; Tanveer,A.; Nadeem,M.A.; Asghar,H.N.; Javaid,M.M.
Rhynchosia capitata is becoming an increasing problem in summer crops, such as cotton, soybean, pearl millet and mungbean in many Asian countries. Laboratory and greenhouse studies have been conducted to determine the effects of several environmental factors on seed germination patterns and seedling emergence of R. capitata. We investigated whether the diverse ecological factors such as temperature, light, salinity, moisture stress, pH, and soil depth affected germination and seedling emergence of R. capitata. Germination increased as temperature increased from 25ºC and significantly reduced at 45ºC. Presence or absence of light did not influence germination. Germination of R. capitata was sensitive to increased salt and moisture stress, as well as to seed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Moisture stress; PH; Salinity; Seedling emergence; Burial depth.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200002

Finding out Relationships Among Some Morpho-Biochemical Parameters of Christ's Thorn (Ziziphus spina-christi) under Drought and Salinity Stresses
Provedor de dados: 87
Autores: NEJAT,N.; SADEGHI,H.
ABSTRACT Taking into consideration that modeling and indicating relationship among traits and variables are among the most useful numerical techniques in the biological and botanical researches, and also undeniable impact of drought and salinity stresses, this research was implemented with the aim to consider change in relationship among the traits under separately drought and salinity stresses related to scarcely distributed medicinal plant called Christ thorn (Ziziphus spina-christi). A glass house experiment was implemented in controlled conditions at the College of Agriculture, Shiraz University, Shiraz, Iran. Five different water stress levels (irrigation at four, six, eight and 10 days intervals, compared to the unstressed control plants with every...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Drought; Stepwise regressions; Principal component analysis; Cluster analysis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400667

Germination Ecology of Two Troublesome Weeds of Arid Chickpea: Euphorbia dracunculoides and Astragalus Species
Provedor de dados: 87
Autores: IKRAM,R.M.; TANVEER,A.; ALI,H.H.; SAFDAR,M.E.; JAVAID,M.M.; ABBAS,T.; HASHIM,S.; CHAUHAN,B.S.
ABSTRACT: The species Euphorbia dracunculoides and Astragalus are problematic weeds of arid chickpea in the chickpea mono-cropping system in Pakistan. The influence of various ecological factors on germination and seedling emergence characteristics of these weeds was determined under laboratory conditions. The results suggested that seed germination of both species was 50% at 15 oC under light conditions, and germination decreased when the temperature was increased. The increase in drought stress from 2.5 to 15% significantly decreased germination of E. dracunculoides and Astragalus spp. Both species failed to germinate at the osmotic potential of -3.02 MPa. The increase in field capacity from 25 to 100% increased emergence percentage and emergence index...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Temperature; Burial depth; Light; Management; Emergence; Salinity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100247

Physiological response of vicia faba to prohexadione-calcium under saline conditions
Provedor de dados: 87
Autores: Bekheta,M.A.; Abdelhamid,M.T.; El-Morsi,A.A.
Changes in the activities of oxidative enzymes (indole acetic acid oxidase, peroxidase and catalase), endogenous hormones (gibberellic acid (GA3), indole acetic acid (IAA), abscisic acid (ABA) and cytokinins (AsZeatin), photosynthetic pigments (chlorophyll a, chlorophyll b and carotenoids), total carbohydrates, total soluble sugars, amino acid proline and vegetative growth parameters were used as indicators to explain the physiological role of the growth retardant prohexadione-calcium on Vicia faba seedlings 40 days after sowing under salinity stress for 30 days. The obtained results show that soaking faba bean seeds prior to sowing at different concentrations of prohexadione-calcium (0, 10, 20 and 30 ppm) significantly increased the activities of indole...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endogenous hormones; Faba bean; Growth retardant; Oxidative enzymes; Salinity.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582009000400015

Management of private tubewells in a conjunctive use environment: a case study in the Mananwala Distributary Command Area, Punjab, Pakistan
Provedor de dados: 31
Autores: Malik,   Saleem M.; Strosser,   Pierre.
This paper analyzes the tubewell data collected by IIMI-Pakistan over a period of 4 years. While the main emphasis remains on the operation of private tubewells, public tubewells and canal water supplies are included in the analyses to give a more comprehensive picture of the conjunctive use environment, a characteristic of most of the irrigated areas of the Punjab, Pakistan.
Tipo: Working or Discussion Paper
Palavras-chave: Irrigation management; Irrigated farming; Tube well irrigation; Groundwater; Surface water; Watercourses; Conjunctive use; Water market; Salinity; Farming systems; Farm Management.
Ano: 1993
URL: http://purl.umn.edu/113013

Food security and sustainable agriculture in India: The water management challenge
Provedor de dados: 31
Autores: Kumar,   M. Dinesh.
Tipo: Working or Discussion Paper
Palavras-chave: Sustainable agriculture; Food security; Water management; Water scarcity; Groundwater depletion; Waterlogging; Salinity; Soil degradation; Water use efficiency; Productivity; Equity; Irrigation water; Pricing; Agricultural and Food Policy; Agricultural Finance; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/92666

Conjunctive water management in the Rechna Doab: An overview of resources and issues
Provedor de dados: 31
Autores: Jehangir,   Waqar Ahmed; Qureshi,   Asad Sarwar; Ali,   Nazim.
Tipo: Working or Discussion Paper
Palavras-chave: Water management; Conjunctive use; Surface water; Groundwater; Aquifers; Pumping; Water quality; River basins; Productivity; Canals; Waterlogging; Salinity; Land resources; Land use; Crop production; Rice; Wheat; Cotton; Sugarcane; Crop Production/Industries; Land Economics/Use; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/92704

Economic benefit and costs of tree planting for salinity control
Provedor de dados: 31
Autores: Hill,   Christine M.
This study reviewed case studies and research focussed on the issues of managing native vegetation, the problems of salinity and the relationship between the two. It then addressed the economic feasibility of six tree planting configurations to reduce the impacts of salinity. The method used a spreadsheet model showing the benefits and costs of various planting configurations over a 30-year time span. This model can be used to assess the monetary net benefit/costs of reducing recharge of a vegetation management proposal. Inputs can be varied to tailor the model to different catchments. Even when applied to local groundwater systems, the impact on salinity in terms of land salinised, salt loads and dollars was small. These factors can represent major...
Tipo: Conference Paper or Presentation
Palavras-chave: Vegetation; Salinity; Benefit cost; Environmental Economics and Policy; Land Economics/Use.
Ano: 2004
URL: http://purl.umn.edu/58706

The lower Krishna Basin trajectory: relationships between basin development and downstream environmental degradation
Provedor de dados: 31
Autores: Venot,   Jean-Philippe; Sharma,   Bharat R.; Rao,   Kamineni V.G.K.
Basin water development and rural dynamics in the Krishna Basin have led to a degradation of downstream ecosystems manifesting itself by salinizing soil and groundwater, increasing pollution, disappearing mangroves and desiccating wetlands. Reversing this evolution requires the formal recognition of the environment as a water user in its own right and the implementation of an environmental water provision. This provision should be based on a two-tier allocation system with assured discharges in the irrigation canals of the delta and to the ocean. This will lead to further commitment of water resources but this is needed to reconcile the social, economic and environmental objectives of a sustainable development. Other measures facilitating integrated...
Tipo: Report
Palavras-chave: River basin development; Lakes; Environmental degradation; Ecosystems; Mangroves; Water allocation; Groundwater; Water quality; Salinity; Irrigated farming; Institutions; Irrigation canals; Rural development; Agribusiness; Crop Production/Industries; Environmental Economics and Policy; Land Economics/Use; Risk and Uncertainty.
Ano: 2008
URL: http://purl.umn.edu/44515

COST OF IGNORANCE- EVALUATING A LAND AND WATER MANAGEMENT PLAN
Provedor de dados: 31
Autores: Hill,   Christine M.
This paper outlines the impacts of ignoring the costs to the community of increased rural waterlogging and salinity. It identifies the cost of no further action, and the costs and benefits of undertaking a land and water management plan. The processes of developing and evaluating the plan are explained. Difficulties in obtaining data, both for the community and the economist, are discussed. Data availability then shapes the range of costs and benefits that can be evaluated. The paper looks at the process and results of a case study of a Land and Water Management Plan for an irrigation district in central New South Wales. The case study demonstrated all the complexities of community and professional conflict, difficulties in data availability, budget and...
Tipo: Presentation
Palavras-chave: Land and water management plan; Economic evaluation; Salinity; Waterlogging; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/123814

Measuring the Long-Term Regional Benefits of Salinity Reduction
Provedor de dados: 31
Autores: Characklis,   Gregory W.; Griffin,   Ronald C.; Bedient,   Philip B.
Approaches for evaluating salinity management benefits are generalized and extended to incorporate consideration of desalination and long-term changes in salinity concentration and water use patterns. Previous research indicates urban users incur the vast majority of salinity-related damages in affected regions, suggesting municipalities may benefit by considering mitigating actions independent of agriculture. However, previous studies have included no consideration of desalination. Earlier studies have also considered stepped increases in salinity, assuming a single future concentration when estimating the long-term benefits of salinity reduction, an approach inconsistent with the incremental nature of these increases. Long-term changes in water use...
Tipo: Journal Article
Palavras-chave: Benefits; Regional water resource modeling; Salinity; Water quality management; Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/30779

Offsetting with Salinity Credits: An Alternative to Irrigation Zoning
Provedor de dados: 31
Autores: Spencer,   Thomas; Ancev,   Tihomir.
Irrigation induced salinity is a serious problem in many countries around the world. In Australia, this type of salinity is most pronounced in the valley of the River Murray in South Australia. Location of irrigation enterprises has been identified as a key factor that needs to be taken into account by policies aimed at mitigating salinity. This article compares and contrasts two such policies: an irrigation zoning policy, where new irrigation enterprises are only allowed in low salinity impact zones, and an offsetting with salinity credits policy, where new irrigation enterprises can locate in high salinity impact zones, provided they offset their salinity impact with salinity credits. Key findings are that the offsetting policy will be both less costly...
Tipo: Conference Paper or Presentation
Palavras-chave: Irrigation; Least-cost; Offsets; Salinity; Land Economics/Use; Q15; Q18; Q25; Q50.
Ano: 2006
URL: http://purl.umn.edu/25517

Mathematical optimisation of drainage and economic land use for target water and salt yields
Provedor de dados: 31
Autores: Nordblom,   Thomas L.; Hume,   Iain H.; Bathgate,   Andrew D.; Reynolds,   Michael.
Land managers in upper catchments are being asked to make expensive changes in land use, such as by planting trees, to attain environmental service targets, including reduced salt loads in rivers, to meet needs of downstream towns, farms and natural habitats. End-of-valley targets for salt loads have sometimes been set without a quantitative model of cause and effect regarding impacts on water yields, economic efficiency or distribution of costs and benefits among stakeholders. This paper presents a method for calculating a ‘menu’ of technically feasible options for changes from current to future mean water yields and salt loads from upstream catchments having local groundwater flow systems, and the land-use changes to attain each of these options at...
Tipo: Journal Article
Palavras-chave: Discounting; Landuse; NPV; Opportunity-cost; Salinity; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/116973

Institutional arrangements for land drainage in developing countries
Provedor de dados: 31
Autores: Freisem,   Claudia; Scheumann,   Waltina.
Tipo: Working or Discussion Paper
Palavras-chave: Drainage; Infrastructure; Irrigable land; Farmer participation; Financing; Land reclamation; Flood control; Irrigated farming; Social aspects; Economic aspects; Environment; Case studies; Operations; Maintenance; Waterlogging; Salinity; Productivity; Food security; Institutional constraints; Communal irrigation systems; Water users' associations; Farm Management; Financial Economics; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Institutional and Behavioral Economics; Land Economics/Use; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2001
URL: http://purl.umn.edu/92776

The global groundwater situation: overview of opportunities and challenges
Provedor de dados: 31
Autores: Shah,   Tushaar; Molden,   David J.; Sakthivadivel,   Ramasamy; Seckler,   David.
Groundwater offers us few but precious opportunities for alleviating the misery of the poor; but it poses many—and daunting—challenges of preserving the resource itself. A big part of the answer is massive initiatives to augment groundwater recharge in regions suffering depletion; but, in the ultimate analysis, these cannot work without appropriate demand-side interventions. The water vision of a world that future generations will inherit will have to be the one in which groundwater plays its full developmental, productive and environmental role but in a sustainable manner; and the framework of action to realize this vision will mean eschewing the current free-for-all in groundwater appropriation and use, and promoting a more responsible management of this...
Tipo: Book
Palavras-chave: Groundwater resources; Groundwater depletion; Water scarcity; Water shortage; Poverty; Rural development; River basins; Sustainability; Waterlogging; Salinity; Aquifers; Water pollution; Pumps; Recharge; Water harvesting; Community/Rural/Urban Development; Environmental Economics and Policy; Food Security and Poverty.
Ano: 2000
URL: http://purl.umn.edu/113506

Groundwater policy: issues and alternatives in India
Provedor de dados: 31
Autores: Moench,   Marcus.
This paper reviews policy-related issues discussed in recent conferences that will affect groundwater development and management efforts in South Asia. Emphasis is given to policy issues surrounding emerging groundwater depletion and quality concerns, and issues concerning the equitable development of groundwater for poverty alleviation. The paper outlines the range of services that depend on groundwater resources and outlines the range of services that depend on groundwater resources to provide these services, and the complications stemming from the fragmented approach taken to water management throughout the region. A range of responses dealing with the management of the physical system is identified. In conclusion , the paper discusses institutional...
Tipo: Book
Palavras-chave: Groundwater management; Groundwater extraction; Water policy; Monitoring; Environment; Poverty; Aquifers; Case studies; Salinity; Salt water intrusion; Water quality; Pollution; Water market; Water use efficiency; Crop Production/Industries; Farm Management; Food Security and Poverty.
Ano: 1996
URL: http://purl.umn.edu/113620

Tsunami impacts on shallow groundwater and associated water supply on the East Coast of Sri Lanka: a post-tsunami well recovery support initiative and an assessment of groundwater salinity in three areas of Batticaloa and Ampara Districts
Provedor de dados: 31
Autores: Villholth,   K.G.; Amerasinghe,   Priyani H.; Jeyakumar,   P.; Panabokke,   Christopher Rajendra; Woolley,   Olivia; Weerasinghe,   M.D.; Amalraj,   N.; Prathepaan,   S.; Burgi,   N.; Lionelrathne,   D.M.D.S.; Indrajith,   N.G.; Pathirana,   S.R.K.
Tipo: Book
Palavras-chave: Groundwater; Aquifers; Salinity; Natural disasters; Water supply; Drinking water; Wells; Rehabilitation; Mosquitoes; Disease vectors; Environmental Economics and Policy; Health Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/118303

Managing Saline Groundwater Impacts from Irrigation - Designing and Testing Emissions Trading in Coleambally Irrigation Area
Provedor de dados: 31
Autores: Whitten,   Stuart M.; Khan,   Shahbaz; Collins,   Drew; Ward,   John; Robinson,   David.
Irrigated agriculture often leads to recharge to local and regional groundwater systems greater than what the systems can absorb, resulting in the development of shallow watertables causing salinity and waterlogging. Policy based on emissions trading offers one option for effective management of existing recharge externalities if effective property rights to diffuse emissions can be defined. In this paper we combine the conclusions drawn from biophysical research with economic principles underpinning emissions trading to present such a system. Allocation of net recharge contracts to irrigation farms will internalize the costs associated with saline aquifer impacts. Irrigators may reduce their compliance costs by creating or purchasing credits that reduce...
Tipo: Conference Paper or Presentation
Palavras-chave: Salinity; Irrigation; Recharge; Tradable emissions; Cap and trade; Hydrologic-economic modelling; Experimental economics; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/9975

Adjustment to Salinity in Irrigation Regions: Ex Post Evaluation of the Tragowel Plains Plan
Provedor de dados: 31
Autores: Baird,   Catherine A.; Gyles,   Oliver.
An early-mid project evaluation of the benefits and costs of the Tragowel Plains Salinity Management Plan estimated the net cost after six years at A$ 5.5 million. The cumulative cash flows for the water transfer, drainage and halophyte programs were all positive with benefit to cost ratios (BCRs) of 3.2, 1.3 and 1.1. Inclusion of estimated future benefits and costs to year 30 gave BCRs of 13.7, 1.3 and 4.0 with net present values (NPVs) of A$ 18.8 million, 2.5 million and 0.4 million respectively. Net costs for other integrated programs including salinity survey, whole farm planning, facilitation of structural adjustment, revegetation and coordination of implementation reduced the NPV of the first six years of implementation to A$ 12.1 million. The water...
Tipo: Presentation
Palavras-chave: Salinity; Structural adjustment; Water transfer; Water market; Tragowel Plains; Resource /Energy Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/123760

Derivation of supply curves for catchment water effluents meeting specific salinity concentration targets in 2050: linking farm and catchment level models or “Footprints on future salt / water planes”
Provedor de dados: 31
Autores: Nordblom,   Thomas L.; Bathgate,   Andrew D.; Young,   Robert A.
The salt burden in a stream reflects the blend of salty and fresh flows from different soil areas in its catchment. Depending not only on long-run rainfall, water yields from a soil are also determined by land cover: lowest if the area is forested and greatest if cleared. Water yields under agro-forestry, lucerne pasture, perennial grass pasture, and annual pasture or cropping options span the range of water yields between the extremes of forested and cleared lands. This study explores quantitative approaches for connecting the hydrologic and economic consequences of farm-level decisions on land cover (productive land uses) to the costs of attaining different catchment level targets of water volumes and salt reaching downstream users; environmental,...
Tipo: Conference Paper or Presentation
Palavras-chave: Salinity; Targets; Opportunity cost; Concentration; Dilution; Effluent; Externality; Supply; Demand; Policy; Water quality; New technology; New markets; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/57929

Wastewater use in agriculture: Review of impacts and methodological issues in valuing impacts
Provedor de dados: 31
Autores: Hussain,   Intizar; Raschid,   Liqa; Hanjra,   Munir A.; Marikar,   Fuard; van der Hoek,   Wim.
Tipo: Working or Discussion Paper
Palavras-chave: Waste waters; Water quality; Flow; Water reuse; Recycling; Irrigation water; Public health; Crop production; Salinity; Soil properties; Groundwater; Ecology; Social impact; Economic impact; Cost benefit analysis; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Health Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/92696

Water use and salinity in the Murray–Darling Basin: A state-contingent model
Provedor de dados: 31
Autores: Adamson,   David; Mallawaarachchi,   Thilak; Quiggin,   John C.
The supply of water for irrigation is subject to climatic and policy uncertainty. The object of the present paper is to show how the linear and non-linear programming models commonly used in modelling problems such as those arising in the Murray–Darling Basin may be adapted to incorporate a state-contingent representation of uncertainty. Estimates showing the potential value of improved water use are also derived.
Tipo: Journal Article
Palavras-chave: Irrigation; Salinity; Uncertainty; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/118332

Charging for irrigation water:  The issues and options, with a case study from Iran
Provedor de dados: 31
Autores: Perry,   Christopher J.
Inadequate funding for maintenance of irrigation works and emerging shortages of water are prevalent. The use of water charges to generate resources for maintenance and to reduce demand is widely advocated. Examples from other utilities, and from the domestic/industrial sectors of water supply suggest the approach could be effective. In developing countries, the facilities required for measured and controlled delivery of irrigation are rarely in place, and would require a massive investment in physical, legal and administrative infrastructure. To be effective in curtailing demand, the marginal price of water must be significant. The price levels required to cover operation and maintenance (O&amp;M) costs are too low to have a substantial impact on demand,...
Tipo: Report
Palavras-chave: Irrigation management; Productivity; Water allocation; Water use efficiency; Operations; Maintenance; Cost recovery; User charges; Water rates; Pricing; River basins; Water shortage; Economic aspects; Salinity; Case studies; Agribusiness; Agricultural Finance; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Financial Economics; Land Economics/Use; Production Economics; Productivity Analysis; Public Economics.
Ano: 2001
URL: http://purl.umn.edu/44567

Historical regulation of Victoria's water sector: A case of government failure?
Provedor de dados: 31
Autores: Harris,   E.
This paper analyses the role of government failure in Victoria’s water sector between 1905 and 1984 as evidenced in the rise of in-stream salinity. It will be shown that high levels of salinity can, in part, be attributed to regulatory failure for two reasons. First, the method of water allocation, a compulsory minimum charge with the marginal cost of water being zero, encouraged over watering, resulting in increased water tables via groundwater recharge. Second, the government did not provide adequate finance for construction of appropriate removal of saline drainage water, and thereby allowed increasing in-stream salinity.
Tipo: Journal Article
Palavras-chave: Externalities; Government failure; Institutions; Salinity; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/118336

Ground Water Quantity and Quality Management: Agricultural Production and Aquifer Salinization over Long Time Scales
Provedor de dados: 31
Autores: Knapp,   Keith C.; Baerenklau,   Kenneth A.
An economic model of ground water salinization is developed. Starting from a full, high-quality aquifer, there is an initial extraction period, an intermediate waste disposal period, and a final drainage period. Drainage management is initially source control and reuse, but eventually culminates in evaporation basins and a system steady-state. This process occurs over long time scales but is consistent with historical observation. Efficiency is qualitatively similar to common property though quantitative magnitudes differ substantially. Regulatory pricing instruments are developed to support the efficient allocation. The system is not sustainable in that net returns generally decline through time until the steady-state.
Tipo: Journal Article
Palavras-chave: Common property; Dynamic programming; Efficiency; Ground water; Irrigation; Salinity; Sustainability; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/8633

Dryland salinity, coordinating action and economic policy: a role for contracts?
Provedor de dados: 31
Autores: Harvey,   Sallyann.
The problem of addressing dryland salinity at a landscape is considered in the context of using economic incentives to encourage change in land use by individual landholders to adopt salinity mitigating actions where a public asset of significant value is threatened. This paper reviews the principal-agent problem and looks at mechanisms which give incentives to address natural resource management problems, and in particular, the role of contracts between the Government and the landholders for achieving environmental objectives. Consideration is then given to the potential for empirical analysis of these policies in practice and their effectiveness in achieving the desired environmental outcomes.
Tipo: Conference Paper or Presentation
Palavras-chave: Salinity; Economic incentives; Contracts; Hidden information; Environmental Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/58703

Respuestas morfológicas y anatómicas de Tessaria absinthioides (Hook. et Arn.) DC. a la salinidad
Provedor de dados: 88
Autores: DEGANO,CLAUDIA A. M.
T. absinthioides, Inuleae, Compositae, is a weedy species that is spreading in the irrigation area of the Colorado River, Argentina. This species can be found in normal and saline soils. Morphological and anatomical variables were measured with two salts, sodium chloride and sodium sulfate, with three levels of osmotic potential -0.4, -0.8 and -1.5 MPa, in hydroponic culture, using Hoagland solution as the cultivation media. The total diameter of the roots of plants growing in Na2SO4 and NaCl increased when the osmotic potential was -0.4 MPa. In plants growing in NaCl this may have resulted from the increase in the size of the cortical cells and in plants growing in Na2SO4, the diameter increased may be due to an increase in the cambial activity. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Morpho-anatomical modifications; Tessaria.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000300002

Soil Chemistry after Irrigation with Treated Wastewater in Semiarid Climate
Provedor de dados: 90
Autores: Oliveira,Pedro Carlos Pacheco de; Gloaguen,Thomas Vincent; Gonçalves,Roberta Alessandra Bruschi; Santos,Dionei Lima; Couto,Carolina Fonseca.
ABSTRACT Soil irrigation using treated wastewater in the Brazilian semiarid region is a promising practice as this area currently faces water scarcity and pollution of water resources by domestic sewage. The aim of this study was to evaluate the use of treated wastewater in drip irrigation and its effect on the chemistry of soil cultivated with squash (Cucurbita maxima Duch.) Coroa IAC and to verify whether there was an increase in soil salinity under a semiarid climate. The experiment was conducted for 123 days on a farm close to the sewage treatment plant, in a randomized block design with five treatments and four replications. The treatments consisted of two irrigation water depths (100 and 150 % of the evapotranspiration), two applications of gypsum to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Soil sodification; Gypsum application.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100409

Soil Quality after Six Years of Paper Mill Industrial Wastewater Application
Provedor de dados: 90
Autores: Almeida,Ivan Carlos Carreiro; Fernandes,Raphael Bragança Alves; Neves,Júlio César Lima; Ruiz,Hugo Alberto; Lima,Túlio Luís Borges de; Hoogmoed,Willem.
ABSTRACT The application of wastewater to irrigate soils may be an attractive option for paper mills, especially when the effluents can also provide nutrients to plants. Since there could be negative environmental effects, such activity must be preceded by a thorough evaluation of the consequences. The changes in soil quality of a Neossolo Flúvico Distrófico (Typic Udifluvent) were evaluated over a period of six years of irrigation with treated effluent from a wood pulp company. Although effluent application for six years did not affect soil resistance to penetration and soil hydraulic conductivity, it promoted a decrease in the mean size of aggregates and an increase in clay dispersion. Effluent application increased soil pH but did not change...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Industrial effluent; Water reuse; Clay dispersion; Wastewater disposal; Salinity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100402

Proposal for an index to classify irrigation water quality: a case study in northeastern Brazil
Provedor de dados: 90
Autores: Maia,Celsemy Eleutério; Rodrigues,Kelly Kaliane Rego da Paz.
One way of classifying water quality is by means of indices, in which a series of parameters analyzed are joined a single value, facilitating the interpretation of extensive lists of variables or indicators, underlying the classification of water quality. The objective of this study was to develop a statistically based index to classify water according to the Irrigation Water Quality Index (IWQI), to evaluate the ionic composition of water for use in irrigation and classify it by its source. For this purpose, the database generated during the Technology Generation and Adaptation (GAT) program was used, in which, as of 1988, water samples were collected monthly from water sources in the states of Paraíba, Rio Grande do Norte and Ceará. To evaluate water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Electrical conductivity; Ionic composition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300013

15N uptake fom manure and fertilizer sources by three consecutive crops under controlled conditions
Provedor de dados: 90
Autores: Garza,Héctor Mario Quiroga; Delgado,Jorge A.; Wong,José Antonio Cueto; Lindemann,William C.
There are several regions of the world where soil N analysis and/or N budgets are not used to determine how much N to apply, resulting in higher than needed N inputs, especially when manure is used. One such region is the North Central "La Comarca Lagunera", one of the most important dairy production areas of Mexico. We conducted a unique controlled greenhouse study using 15N fertilizer and 15N isotopic-labeled manure that was labeled under local conditions to monitor N cycling and recovery under higher N inputs. The manure-N treatment was applied only once and was incorporated in the soil before planting the first forage crop at an equivalent rate of 30, 60 and 120 Mg ha-1 dry manure. The 15N treatments were equivalent to 120 and 240 kg ha-1 (NH4)2SO4-N...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Denitrification; Nitrogen use efficiency; Annual ryegrass; Salinity; Sudangrass.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500018

Lettuce growth and water consumption in NFT hydroponic system using brackish water
Provedor de dados: 91
Autores: Soares,Hammady R.; Silva,Ênio F. de F. e; Silva,Gerônimo F. da; Pedrosa,Elvira M. R.; Rolim,Mario M.; Santos,Alexandre N.
The qualitative aspects of water, such as the preparation or replenishment of the nutrient solution, are critical to the success of hydroponic crops. Therefore, the aim of this study was to evaluate the behavior of “Americana” lettuce (cv. Tainá) under increasing levels of saline stress (0.2 - control, 1.2, 2.2, 3.2, 4.2 and 5.2 dS m-1), replenishing the evapotranspiration with brackish water in Experiment I and supply water (0.2 dS m-1) in Experiment II, both used in the preparation of the nutrient solution. In both experiments, the treatments were arranged in a randomized block design, with six treatments and four replicates. Shoot fresh matter, shoot dry matter and leaf area in Experiment I suffered reductions of 15.22, 12.67 and 15.6% per unit increase...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa L.; Hydroponics; Salinity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000700636

Use of fish-farming wastewater in lettuce cultivation
Provedor de dados: 91
Autores: Guimarães,Isaías P.; Oliveira,Francisco de A. de; Torres,Salvador B.; Pereira,Francisco E. C. B.; França,Francisco D. de; Oliveira,Mychelle K. T. de.
ABSTRACT Lettuce stands out as the main leafy vegetable consumed in Brazil, with divergence regarding adaptability to different environmental conditions, which include salinity. The objective of the work was to evaluate the response of lettuce cultivars to the use of saline wastewater from fish farming. The experiment was conducted in a completely randomized design with four replicates, in a factorial 7 x 4, corresponding to seven cultivars (Regiane, Vera, Isabela, Elisa, Amelia, Lavinia and Angelina) and four salt concentrations (1.2, 2.2, 3.2 and 4.2 dS m-1). The evaluated characteristics were: number of leaves, leaf area, crown diameter and shoot fresh and dry matter. Diluted wastewater from fish farming can be used in the preparation of solution for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Water resources; Salinity; Sustainability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000800728

Water potential and gas exchanges in sugarcane irrigated with saline waters
Provedor de dados: 91
Autores: Lira,Raquele M. de; Silva,Ênio F. de F. e; Barros,Marcone da S.; Gordin,Leandro C.; Willadino,Lilia G.; Barbosa,Rodrigo F.
ABSTRACT In Pernambuco, state in the northeastern region of Brazil, in the coastal areas, due to the intrusion of seawater, the waters used for sugarcane irrigation can have high salt contents and cause serious problems to soil and plant. The present study aimed to evaluate the effects of irrigation with saline water on the physiology of sugarcane, variety RB867515, irrigated under five salinity levels of 0.5; 2.0; 3.5; 5.0 and 6.5 dS m-1 in a completely randomized design, with four replicates in drainage lysimeters. The study was conducted in the period from December 2014 to June 2015, at the Federal Rural University of Pernambuco (UFRPE). Salinity levels were obtained by dissolving NaCl and CaCl2 in water from the local supply system (ECw = 0.5 dS m-1)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Salinity; Irrigation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000679

Exogenous application of phytohormones mitigates the effect of salt stress on Carica papaya plants
Provedor de dados: 91
Autores: Sá,Francisco V. da S.; Brito,Marcos E. B.; Silva,Luderlândio de A.; Moreira,Rômulo C. L.; Paiva,Emanoela P. de; Souto,Lauter S.
ABSTRACT The salinity has complex effects on the physiological, nutritional and hormonal interactions of plants. This study aimed to evaluate the mitigating action of exogenous application of different types and concentrations of phytohormones on Carica papaya under salt stress. The experiment was conducted in greenhouse, using a randomized block design with treatments formed from a 2 x 3 x 5 factorial scheme, relative to two concentrations of salts in the irrigation water (0.6 and 2.4 dS m-1), three types of phytohormones [Auxin = indole-3-acetic acid; Cytokinin = CPPU (N-(2-chloro-pyridyl)-N-phenylurea) and Gibberellin = gibberellic acid(AG3)], and five concentrations of the phytohormone (0, 12.5, 25.0, 37.5 and 50.0 µM L-1), with three repetitions,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxins; Cytokinins; Gibberellins; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000300170

Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress
Provedor de dados: 91
Autores: Lacerda,Claudivan F. de; Ferreira,Jorge F. da S.; Suarez,Donald L.; Freitas,Emanuel D.; Liu,Xuan; Ribeiro,Aureliano de A.
ABSTRACT The aim of this study was to evaluate the accumulation of salts in the soil from irrigation water and of N and K from fertilization. The experiment was conducted in PVC columns (20 cm in diameter and 100 cm in height), filled with non-saline soil, and cultivated with maize. A completely randomized block design in a 4 x 4 factorial was used, with four levels of salinity (0.5, 2.5, 5.0 and 7.5 dS m-1), four N rates, and five replicates. Nitrogen was applied as urea and potassium nitrate at the following rates: N1: N recommendation for maize (2.6 g column-1); N2: 0.3 times (0.78 g column-1) the recommended N1 dose; N3 and N4 with N based on N1 and N2 doses, respectively, reduced proportionally based on the evapotranspiration reduction caused by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Nitrate; Nutrients leaching.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800553

Absorption of nutrients by cowpea irrigated with saline water under different leaching fractions
Provedor de dados: 91
Autores: Tagliaferre,Cristiano; Guimarães,Diogo U. G.; Gonçalves,Lorena J.; Amorim,Carlos H. F.; Campos,Willian V.; Rocha,Felizardo A.
ABSTRACT Salinity is one of the main environmental problems that negatively affect plant growth and metabolism, besides being one of the factors responsible for the decrease in the yield of crops, especially in arid and semiarid regions. Thus, the aim of this study was to evaluate the effects of soil salinity on the mineral nutrition of irrigated cowpea. The experiment was conducted in drainage lysimeters in a greenhouse, in a completely randomized design with seven treatments, one irrigated with freshwater (control) and six irrigated with saline water with different leaching fractions (5, 10, 15, 20, 30 and 40%) of the applied irrigation depth, with three replicates. The irrigation with saline water treatments did not affect significantly the contents of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Leaching depths; Irrigation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001201067

Physiological characteristics and yield of ‘Pérola’ pineapple in the semi-arid region
Provedor de dados: 91
Autores: Brito,Cleiton F. B.; Santos,Marcelo R. dos; Fonseca,Varley A.; Arantes,Alessandro de M.; Almeida,Jean R. de.
ABSTRACT The objective of this study was to evaluate the physiological characteristics and yield of ‘Pérola’ pineapple subjected to irrigation with saline water in the semi-arid region of Bahia. The experiment was conducted in randomized blocks with five treatments, represented by irrigation depths: 100% ETc, using water with electrical conductivity (ECw) of 0.75 dS m-1, and 50, 75, 100 and 125% ETc, using water with ECw of 3.6 dS m-1. The experiment used a drip irrigation system and pressure-compensating emitters with a discharge of 8 L h-1. In the physiographic conditions of Guanambi-BA, pineapple has limitations of the physiological characteristics of chlorophyll fluorescence and chlorophyll index, under irrigation with both saline water and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; CAM plants; Irrigation management.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001200834

Growth, production and water consumption of coriander in hydroponic system using brackish waters
Provedor de dados: 91
Autores: Silva,Mairton G. da; Oliveira,Itamar de S.; Soares,Tales M.; Gheyi,Hans R.; Santana,Geocassia de O.; Pinho,Jozelmo de S.
ABSTRACT An experiment was carried out in an adapted DFT (deep film technique) hydroponic system in PVC pipes to evaluate the growth, production and water consumption of coriander cv. ‘Verdão’, during June-July 2014. The experiment was carried out in a randomized block design with five replicates, in a 2 x 4 factorial scheme, totaling 40 plots. Two intervals of nutrient solution recirculation (0.25 and 2 h) and four levels of water electrical conductivity (ECw 0.26, 2.47, 4.91 and 7.0 dS m-1) were evaluated. At 25 days after transplanting (DAT), the reductions in plant height and in the shoot fresh and dry matter of the bunch were 2.95, 6.08 and 3.32% per unit increase of ECw (in dS m-1). Despite the reductions in growth and production, saline stress did...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coriandrum sativum L.; Soilless cultivation; Nutrient solution recirculation; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800547

Effects of water salinity and organomineral fertilization on leaf composition and production in Passiflora edulis
Provedor de dados: 91
Autores: Souza,José T. A.; Nunes,Járisson C.; Cavalcante,Lourival F.; Nunes,Juliete A. da S.; Pereira,Walter E.; Freire,José L. de O.
ABSTRACT An experiment was undertaken in Remígio County, Paraíba State, Brazil, from July 2013 to May 2014, in order to evaluate the effects of saline water irrigation, bovine biofertilizer, and potassium type on soil salinity, leaf macronutrient composition, and production of yellow passion fruit cv. BRS Gigante Amarelo. Treatments were distributed in randomized blocks, arranged in a 2 × 2 × 2 factorial design, with reference to electrical conductivity of the water (0.35 and 4.00 dS m-1), soil with and without bovine biofertilizer, and application of potassium chloride as a conventional treatment (KCl) and in an organic polymer-coated form, supplied monthly. Bovine biofertilizer was diluted in non-saline water (proportion, 50%) and applied via water at a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yellow passion fruit; Bovine biofertilizer; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800535

Biometrics and grain yield of sorghum varieties irrigated with salt water
Provedor de dados: 91
Autores: Guimarães,Miguel J. M.; Simões,Welson L.; Oliveira,Anderson R. de; Araujo,Gherman G. L. de; Silva,Ênio F. de F. e; Willadino,Lilia G.
ABSTRACT The objective of this study was to identify sorghum varieties that have growth and grain yield potential under saline conditions. The study was conducted in 2016 at a greenhouse of the Embrapa Semiárido, in Petrolina, state of Pernambuco, Brazil (9° 8’ 8.9’’ S, 40° 18’ 33.6’’ W, and altitude of 373 m). A randomized block experimental design, with a 6 × 5 factorial arrangement, and three replications was used. The treatments consisted of six grain sorghum varieties (1011-IPA, 2502-IPA, 2564-IPA, 2600-IPA, Ponta Negra, and Qualimax), and five salinity levels of the irrigation water (ECw = 0, 1.5, 3.0, 6.0, and 12.0 dS m-1). Plant height, stem diameter, dry matter yield, width and length of the +3 leaf, total leaf area, water use efficiency, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Sorghum bicolor L.; Semi-arid.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000400285

Gas exchanges and growth of passion fruit under saline water irrigation and H2O2 application
Provedor de dados: 91
Autores: Andrade,Elysson M. G.; Lima,Geovani S. de; Lima,Vera L. A. de; Silva,Saulo S. da; Gheyi,Hans R.; Silva,André A. R. da.
ABSTRACT The study was carried out to evaluate the photosynthetic efficiency and growth of yellow passion fruit, cultivated under different levels of irrigation water salinity and exogenous application of hydrogen peroxide. The experiment was carried out in greenhouse of the Universidade Federal de Campina Grande, PB, Brazil, using drainage lysimeters with capacity for 100 dm3, filled with Entisol of sandy texture. The experimental design was randomized blocks using a 4 x 4 factorial scheme, with three repetitions, corresponding to four water salinity (0.7; 1.4; 2.1 and 2.8 dS m-1) and four concentrations of hydrogen peroxide (0, 20, 40 and 60 µM). The different concentrations of hydrogen peroxide were applied by soaking the seed for a period of 24 h and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passiflora edulis; Antioxidant enzyme; Salinity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200945

Biochemical components and dry matter of lemon and mandarin hybrids under salt stress
Provedor de dados: 91
Autores: Sá,Francisco V. da S.; Brito,Marcos E. B.; Figueiredo,Lizaiane C. de; Melo,Alberto S. de; Silva,Luderlândio de A.; Moreira,Rômulo C. L.
ABSTRACT The objective was to study the biochemical changes and dry matter content in lemon and mandarin hybrids under salt stress during rootstock formation. For this, a study was conducted in randomized complete block, using a 2 x 5 factorial scheme, with two salinity levels (0.3 and 4.0 dS m-1) applied in five citrus rootstock genotypes (1. TSKC x CTARG - 019; 2. LRF; 3. TSKC x (LCR x TR) - 040; 4. LCRSTC and 5. LVK), with three replicates and four plants per plot. At 90 days after sowing, saline treatments started to be applied and continued until 120 days after sowing, the moment in which the plants were collected for evaluation of biochemical characteristics and phytomass accumulation. The increase in water salinity negatively affected the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus spp.; Salinity; Chlorophyll and carotenoids; Water status.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000400249

Nitrogen and potassium fertigation in bell pepper cultivated in greenhouse using fertigation managements
Provedor de dados: 91
Autores: Nunes Júnior,Edivan S.; Medeiros,José F. de; Oliveira,Francisco de A. de; Lima,Luan A.; Bezerra,Francisco M. S.; Alves,Rita de C.
ABSTRACT The objective of the study was to evaluate the effect of different managements of fertigation and NK doses on the production of bell pepper fruit in a protected environment. The experimental design was randomized blocks in 3 x 5 factorial. The treatments were formed by the combination of three managements of fertigation (M1 - Based on the rate of absorption; M2 - Monitoring the electrical conductivity of the soil solution; M3 - Monitoring concentrations of N and K ions in the soil solution), with five doses of NK (0, 50, 100, 150 and 200% of the recommended dose) and four replicates. Six samples were collected and the following variables were evaluated: number, length and diameter of fruit, pulp thickness and fruit production. Except for diameter,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum L.; Soil solution; Salinity; Ionic concentration.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300186

Enzymatic activity of three sugarcane varieties under salt stress
Provedor de dados: 91
Autores: Carvalho,Mercia F.; Correa,Marcus M.; Carvalho,Gian C.; Rolim Neto,Fernando C.; Marinho,Gessica P. A.; Andrade,Sunamita B. de.
ABSTRACT Sugarcane is a species of great economic importance to Brazil. The study of enzymatic activity has helped to identify varieties of sugarcane tolerant to salt stress, for planting in Brazilian semiarid regions, where there is the occurrence of saline soils. The objective of this study was to evaluate the enzymatic activity of three varieties of sugarcane subjected to stress caused by salinity. The experiment was conducted in a greenhouse at the Federal Rural University of Pernambuco, in a completely randomized design with four replicates. The leaf blade samples were collected for analysis of soluble proteins and determination of the activity of catalase and ascorbate peroxidase. The protein content was higher for RB962962 and lower for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Antioxidant enzymes; Resistance.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000900806

Morphophysiology of Tahiti lime grafted onto Sunki mandarin hybrids under salt stress
Provedor de dados: 91
Autores: Silva,Luderlândio A.; Brito,Marcos E. B.; Fernandes,Pedro D.; Sá,Francisco V. da S.; Moreira,Rômulo C. L.; Almeida Neto,Isidro P. de.
ABSTRACT This study aimed to evaluate the growth and physiology of citrus scion/rootstock combinations irrigated with saline water until the pre-flowering stage. The experiment was conducted in drainage lysimeters with capacity for 150 dm3, in randomized block design in a 2 x 10 factorial scheme, corresponding to two electrical conductivities of water (S1 = 0.3 and S2 = 3.0 dS m-1) and ten scion/rootstock combinations (nine hybrids and one commercial variety) grafted with Tahiti lime, in three repetitions and one plant per plot. Grafted seedlings were transplanted one year after sowing, subjected to salt stress from 15 days after transplanting until the pre-flowering period, and evaluated for gas exchanges and growth. The irrigation with 3.0 dS m-1 saline...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus spp.; Poncirus trifoliata; Gas exchanges; Salinity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000800598

Tolerance of peanut (Arachis hypogea) genotypes to salt stress in the initial phase
Provedor de dados: 91
Autores: Sá,Francisco V. da S.; Santos,Manoel G. dos; Barros Júnior,Aurélio P.; Albuquerque,José R. T. de; Souza,Almir R. E. de; Ribeiro,Rayanne M. P.
ABSTRACT This study aimed to evaluate the emergence, growth, biomass accumulation and tolerance of peanut genotypes under salt stress. The experiment was conducted in a protected environment (greenhouse), evaluating six peanut genotypes (Tatuí, L7151, Caiapó, IAC8112, IAC881 and Havana), which were subjected to two levels of irrigation water salinity (0.5 [control] and 3.5 dS m-1), arranged in a 6 x 2 factorial scheme, in a randomized block design, with five repetitions, with two plants per plot. Plants were cultivated for 30 days after sowing in lysimeters with capacity for 0.5 dm3, filled with a mixture of non-saline, non-sodic soil and commercial substrate in 1:1 proportion on volume basis. During this period, plants were evaluated for emergence,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Irrigation; Salinity; Genetic improvement.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000100037

Content of inorganic solutes in lettuce grown with brackish water in different hydroponic systems
Provedor de dados: 91
Autores: Cova,Alide M. W.; Freitas,Fabio T. O. de; Viana,Paula C.; Rafael,Maria R. S.; Azevedo Neto,André D. de; Soares,Tales M.
ABSTRACT The objective of this study was to evaluate the growth and accumulation of ions in lettuce grown in different hydroponic systems and recirculation frequencies. The experimental design was randomized blocks with 8 treatments and 4 replicates. The evaluated hydroponic systems were Nutrient Flow Technique (NFT) and an adapted Deep Flow Technique (DFT), the latter with recirculation frequencies of 0.25, 2 and 4 h. Both systems used fresh water and brackish water. Plant growth, accumulation of inorganic solutes (Na+, K+, Cl- and NO3-) and the correlation between dry matter production and Na+/K+ and Cl-/NO3- were evaluated. The salinity of the water used to prepare the nutrient solution caused decrease in growth and K+ and NO3- levels, and increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soilless cultivation; Lactuca sativa; Salinity; NFT and DFT systems.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300150

Saline stress and temperatures on germination and vigor of Piptadenia moniliformis Benth. Seeds
Provedor de dados: 91
Autores: Pereira,Francisco E. C. B.; Medeiros Filho,Sebastião; Torres,Salvador B.; Martins,Cibele C.; Brito,Selma F. de.
ABSTRACT The knowledge concerning the physiology of germination in saline areas may contribute to the development of more efficient cultural practices and adequate choice of planting areas. Thus, the objective of this study was to evaluate the effects of saline and temperature stress on germination and vigor of Piptadenia moniliformis (a species known in Brazil as "catanduva") seeds. The treatments were distributed according to a completely randomized design in accordance with a 3 x 6 factorial arrangement (temperature x osmotic potential), with four replicates of 25 seeds each. The seeds were put to germinate at constant temperatures of 25, 30, and 35 °C on paper towel moistened in distilled water (0.0) and NaCl solutions at 0.2, 0.4, 0.6, 0.8 and 1.0...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fabaceae; Catanduva; Forest seeds; Salinity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000700649

Tolerance of guava rootstocks under salt stress
Provedor de dados: 91
Autores: Sá,Francisco V. da S.; Nobre,Reginaldo G.; Silva,Luderlândio de A.; Moreira,Rômulo C. L.; Paiva,Emanoela P. de; Oliveira,Fernanda A. de.
ABSTRACT This study aimed to evaluate the tolerance of guava rootstocks under salt stress in the initial development stage. The experiment was conducted in a greenhouse in a randomized block design in a 5 x 3 factorial, consisting of five levels of irrigation water salinity (0.6, 1.2, 1.8, 2.4 and 3.0 dS m-1) and three guava rootstocks (‘Crioula’, ‘Paluma’ and ‘Ogawa’), with four replicates and four plants per replicate. Emergence, growth and phytomass accumulation were evaluated 30 days after sowing. Increased salinity restricts guava emergence, growth and phytomass accumulation, and the most drastic effects occur at levels higher than 1.8 dS m-1. The cultivar ‘Crioula’ is more tolerant to salinity in relation to ‘Paluma’ and ‘Ogawa’, and can be indicated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava L.; Irrigation; Salinity; Propagation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001201072

Chlorophyll a fluorescence in saccharine sorghum irrigated with saline water
Provedor de dados: 91
Autores: Monteiro,Danilo R.; Melo,Hidelblandi F. de; Lins,Cintia M. T.; Dourado,Pablo R. M.; Santos,Hugo R. B.; Souza,Edivan R. de.
ABSTRACT Soil salinity directly affects plants, interfering in the emission of fluorescence, and promoting the degradation of photosynthetic pigments. Thus, estimating the damage to the photosynthetic apparatus caused by saline water is an important tool to detect abiotic stresses. For this purpose, sorghum plants were cultivated in a greenhouse and irrigated with two water sources (NaCl and salt mixture) with six levels of electrical conductivity (EC) (0, 2.5, 5, 7.5, 10, and 12.5 dS m-1), forming a 6 × 2 factorial in randomized blocks with four repetitions. At 60 days after sowing, the photosynthetic pigments were quantified, the chlorophyll a fluorescence parameters (initial fluorescence [F0]; variable fluorescence [Fv]; maximum fluorescence [Fm];...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Photosynthetic pigments; Photochemical efficiency.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001000673

Morphometric responses and tolerance of pomegranate seedlings irrigated with saline water
Provedor de dados: 91
Autores: Almeida,João P. N. de; Mendonça,Vander; Alves,Anderson A.; Cardoso Neto,Raulino; Costa,Luilson P.; Silva,Francisco S. O.
ABSTRACT Information on the production of seedlings and initial growth of pomegranate irrigated with saline water is scarce in the Brazilian semi-arid region. The objective of this study was to assess the effect of irrigation water salinity levels on the growth and tolerance of pomegranate seedlings. The experiment was conducted in a greenhouse, located at the Federal Rural University of the Semi-Arid Region, Mossoró, RN, Brazil. A randomized block design with five treatments [electrical conductivities of irrigation water (ECw) of 0.6, 3.0, 6.0, 9.0, 12.0 dS m-1] and five replicates, with three plants per plot, was used. At 120 days after sowing, the following characteristics were evaluated: shoot, root and total lengths (cm); stem diameter (mm), dry mass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Punica granatum L.; Salinity; Propagation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000500341

Development of seedlings of watermelon cv. Crimson Sweet irrigated with biosaline water
Provedor de dados: 91
Autores: Silva,José E. S. B. da; Matias,Janete R.; Guirra,Keylan S.; Aragão,Carlos A.; Araujo,Gherman G. L. de; Dantas,Bárbara F.
ABSTRACTThe limited access and the scarcity of good quality water for agriculture are some of the major problems faced in agricultural areas, particularly in arid and semiarid regions. The aim of this study was to evaluate the quality of watermelon seedlings (cv. Crimson Sweet), irrigated with different concentrations of biosaline water of fish culture. The experimental design was completely randomized with five treatments, corresponding to biosaline water at different concentrations (0, 33, 50, 67 and 100%), and four replicates of 108 seedlings. Watermelon seeds were sown in plastic trays filled with commercial substrate and irrigated with different solutions of biosaline water. Seedlings were harvested for biometric analysis at 14, 21 and 28 days after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrullus lanatus; Wastewater; Salinity; Germination.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000900835

Germination and initial growth of guava plants irrigated with saline water
Provedor de dados: 91
Autores: Cavalcante,Lourival F.; Cavalcante,Ítalo H. L.; Pereira,Kátia S. N.; Oliveira,Francisco A. de; Gondim,Saulo C.; Araújo,Fernanda A. R. de.
The present study was carried in order to evaluate the effect of saline water irrigation with electrical conductivity (ECw) of 0.5; 1.5; 3.0; 4.5 and 6.0 dS m-1, on germination and some growth variables during the seedling formation process of four guava cultivars (Psidium guajava L.): Pentecoste, Paluma, Surubim and IPA B-38. Water salinity inhibited the germination process, plant height, stem diameter, leaf area and dry matter production of roots, stems and leaves, independently of cultivar. After germination, the seedlings did not survive due to saline water effects of ECw 4.5 and 6.0 dS m-1. After 180 days of sowing, the seedlings irrigated with ECw more than 1.5 dS m-1 did not present agronomic quality for planting. Dry matter production sequence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seedling production; Salinity; Psidium guajava.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662005000400012

Strategies of fertigation with saline water for growing cucumber in a greenhouse
Provedor de dados: 91
Autores: Oliveira,Francisco de A. de; Souza Neta,Maria L. de; Miranda,Neyton de O.; Souza,Antônia A. T.; Oliveira,Mychelle K. T. de; Silva,Dennis D. A. da.
ABSTRACT The objective of this study was to evaluate the use of saline water to grow cucumbers cultivated in substrate composed of coconut fiber and washed fine sand (1:1) and submitted to split-root system. The experimental design was completely randomized, with eight treatments and four replicates. Treatments consisted of different fertigation managements, comprising two nutrient solutions of different electrical conductivities (1.65 and 6.25 dS m-1), applied in a continuous or alternated way, with splitting or not of the root system (S/S). Growth and yield variables were evaluated. The use of water with electrical conductivity of 6.25 dS m-1 to prepare the nutrient solution caused significant reduction in all variables of cucumber growth and production....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis sativus; Salinity; Split root system.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000900606

Beet cultivation with saline effluent from fish farming
Provedor de dados: 91
Autores: Simões,Welson L.; Yuri,Jony E.; Guimarães,Miguel J. M.; Santos,José E. dos; Araújo,Emanoel F. J.
ABSTRACT This study aimed to evaluate the distribution of salts along the soil profile, the biometric parameters and the yield of beet cultivars under different leaching fractions using saline effluent from fish farming, under the conditions of the Sub-middle São Francisco Valley. An experiment was conducted at the Caatinga Experimental Field of the Embrapa Semi-Arid, in 2013. The treatments were arranged in split plots composed of four leaching fractions (0, 5, 10 and 15%) in the plots, with saline effluent from fish farming, and three table beet cultivars in the subplots: Scarlet Super, Early Wonder 200 and Fortuna. The analysed parameters were: salt distribution along the soil profile, number of leaves, length and width of leaves and petioles, total and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Salt distribution; Leaching fraction.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100062

Plant growth, accumulation and solute partitioning of four forest species under salt stress
Provedor de dados: 91
Autores: Viégas,Ricardo A.; Queiroz,José E.; Silva,Lígia M. de M.; Silveira,Joaquim A. G.; Rocha,Iza M. A.; Viégas,Pedro R. A.
Under NaCl-salinity Na+ and Cl- accumulation of shoot and root vary greatly among glycophyte plants; this is mostly due to genetic diversity and has been utilized to distinguish between plant responses to salinity. The current study aimed to evaluate the accumulation and Na+ and Cl- tissue partitioning and its effect on dry mass gain and K+ accumulation in one-month-old Prosopis juliflora, Leucaena leucocephala, Piptadenia macrocarpa and Mimosa hostilis seedlings grown for 30 days, in sand watered with nutrient solution loading 100 mol m-3 of NaCl, in greenhouse. The Na+ and Cl- accumulation, but not partitioning between shoot and root, depended on plant species. All the plants accumulated Cl- over Na+ both in shoot and root. The K+ content of plants did...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Potassium; Sodium; Chloride.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662003000200012

Growth and gas exchanges in soursop under irrigation with saline water and nitrogen sources
Provedor de dados: 91
Autores: Silva,Evandro M. da; Lima,Geovani S. de; Gheyi,Hans R.; Nobre,Reginaldo G.; Sá,Francisco V. da S.; Souza,Leandro de P.
ABSTRACT Nitrogen (N) fertilization has been tested for the mitigation of salt stress in some species including fruit crops. However, special attention should be paid to the source of N, due to the different compositions and saline indices of the fertilizers, particularly when irrigation is conducted using waters with salinity levels that are restrictive to agriculture. Thus, this study evaluated the effect of fertilization with N sources on the growth and gas exchanges of soursop irrigated with saline water after transplanting. The experiment was carried out in greenhouse at the Center of Technology and Natural Resources of the Federal University of Campina Grande, and treatments were arranged in randomized blocks, in 4 x 4 factorial scheme, corresponding...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annona muricata L.; Salinity; Nitrogen; Photosynthesis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100776

Salt balance in substrate cultivated with ‘Sunki’ mandarin x ‘Swingle’ citrumelo hybrids
Provedor de dados: 91
Autores: Almeida,Juliana F.; Sales,Giuliana N. B.; Brito,Marcos E. B.; Fernandes,Pedro D.; Soares Filho,Walter S.; Almeida Neto,Isidro P.
ABSTRACT During initial plant development stage, an experiment was conducted to evaluate the balance of salts in the substrate used for the production of 10 hybrids from the cross between ‘Sunki’ mandarin (TSKC) and ‘Swingle’ citrumelo (CTSW), all with potential to be used as rootstock. ‘Rangpur Santa Cruz’ lime, ‘Sunki Tropical’ mandarin and the hybrid LVK (‘Volkamer’ lemon) x LCR (‘Rangpur’ lime) - 038 were included as controls, totaling 13 genotypes. Substrate samples were collected in the experiment conducted in a greenhouse at the Federal University of Campina Grande, Campus of Pombal, from December 2015 to June 2016. Two levels of irrigation water salinity were tested, using a 2 x 13 factorial scheme, with 4 replicates. The substrate was a mixture of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus spp.; Rootstocks; Tolerance; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700493

Saline stress and potassium/calcium ratio in fertigated eggplant
Provedor de dados: 91
Autores: Santos,Jefferson M. A. P. dos; Oliveira,Francisco de A. de; Medeiros,José F. de; Targino,Ana J. de O.; Costa,Luilson P. da; Santos,Sandy T. dos.
ABSTRACT In order to evaluate the effect of irrigation water salinity in interaction with different potassium and calcium ratios applied through fertigation in eggplant, an experiment was carried out at the Department of Environmental and Technological Sciences of the Federal Rural University of the Semi-Arid Region, in Mossoró, RN, Brazil. The experimental design was randomized blocks, in a 5 x 4 factorial scheme, with four replicates. The treatments were obtained by the combination between five ionic ratios of potassium and calcium (F1 = 4.2/1; F2 = 3.5/1; F3 = 2.8/1; F4 = 2.2/1; F5 = 1.8/1) and four levels of irrigation water salinity (S1 – 0.5; S2 – 2.0; S3 – 3.5; and S4 – 5.0 dS m-1). The following variables were evaluated: number of fruits per plant,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum melongena L.; Cultivation of vegetables; Fertigation management; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100770

Salt stress and temperatures on the germination and initial growth of ‘jurema-de-embira’ (Mimosa ophthalmocentra) seedlings
Provedor de dados: 91
Autores: Nogueira,Narjara W.; Torres,Salvador B.; Freitas,Rômulo M. O. de; Santos,Paulo C. da S.; Sá,Francisco V. da S.; Leite,Moadir de S.
ABSTRACT The objective of this study was to evaluate the effects of salinity on the germination and initial growth of ‘jurema-de-embira’ (Mimosa ophthalmocentra) seedlings at different temperatures. The experiment was installed in a completely randomized design, in a factorial scheme of eight salt concentrations (0; 4.0; 8.0; 12.0; 16.0; 20.0; 24.0 and 28.0 dS m-1) and four temperatures (25, 30, 35 and 20-30 °C) in four replicates of 25 seeds under an 8-h photoperiod in Biochemical Oxygen Demand germinators. The variables analyzed were: germination, germination speed index, shoot and root lengths, and shoot, root and total dry matter. Temperature variation influences the response of ‘jurema-de-embira’ seeds to salinity, and the salt stress is intensified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fabaceae; Forest species; Caatinga; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400273

Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water
Provedor de dados: 91
Autores: Oliveira,Wanderson J. de; Souza,Edivan R. de; Cunha,Jailson C.; Silva,Ênio F. de F. e; Veloso,Venâncio de L.
ABSTRACT Leaf gas exchanges in plants and soil respiration are important tools for assessing the effects of salinity on the soil-plant system. An experiment was conducted with cowpea irrigated with saline water (0, 2.5, 5.0, 7.5, 10.0 and 12.5 dS m-1) prepared with two sources: NaCl and a mixture of Ca, Mg, Na, K and Cl ions in a randomized block design and a 6 x 2 factorial scheme, with four replicates, totaling 48 experimental plots. At 20 days after planting (DAP), plants were evaluated for net photosynthesis (A), stomatal conductance (gs) and transpiration (E) using the Infra-Red Gas Analyzer (Model XT6400- LICOR), and water use efficiency, intrinsic water use efficiency and instantaneous efficiency of carboxylation were calculated. At 60 DAP, the soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Photosynthesis; Salinity; Salt stress; Soil respiration.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000100032

Saline-sodic soil treated with gypsum, organic sources and leaching for successive cultivation of sunflower and rice
Provedor de dados: 91
Autores: Santos,Petrônio D. dos; Cavalcante,Lourival F.; Gheyi,Hans R.; Lima,Geovani S. de; Gomes,Everaldo M.; Bezerra,Francisco T. C.
ABSTRACT Correction of saline and sodic soils aims to reduce salts dissolved in the solution and exchangeable sodium, respectively, to allow the growth and production of crops. In this context, an experiment was carried out between August/2011 and September/2012, in saline-sodic soil of the Irrigated Perimeter of São Gonçalo, in the municipality of Sousa, PB, Brazil. Agricultural gypsum, organic sources and continuous leaching for reducing salinity, sodicity and alkalinity in the saline-sodic soil and their effects on the production of the sunflower cultivar Embrapa 122/V-2000 and the rice variety Diamante were evaluated. The treatments were distributed in four randomized blocks and the soil was subjected to continuous leaching for 50 days and evaluated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus; Correction of sodicity; Salinity; Soil conditioners.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200891

Cultivation of forage sorghum varieties irrigated with saline effluent from fish-farming under semiarid conditions
Provedor de dados: 91
Autores: Guimarães,Miguel J. M.; Simões,Welson L.; Tabosa,José N.; Santos,José E. dos; Willadino,Lilia.
ABSTRACT This study aimed to evaluate the cultivation of forage sorghum subjected to different leaching fractions with saline effluent from fish-farming under semiarid conditions. The experiment was set in a randomized block design, with four blocks, in split plots, composed of four leaching fractions (0; 5; 10 and 15%) and three forage sorghum varieties ('Volumax', 'F305' and 'Sudão'). Irrigation was performed using saline effluent from fish farming with electrical conductivity of 2.5 dS m-1. The analyzed variables were: plant height; stem diameter; width, length and number of leaves; fresh and dry matter yield, and relative contents of potassium and sodium in the shoots. Forage sorghum under saline effluent irrigation and leaching fraction of 15% shows a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaching fraction; Salinity; Sorghum bicolor (L.) Moench.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000500461

Stress index, water potentials and leaf succulence in cauliflower cultivated hydroponically with brackish water
Provedor de dados: 91
Autores: Cruz,Adiel F. da S.; Silva,Gerônimo F. da; Silva,Ênio F. de F. e; Soares,Hammady R. e; Santos,Jenyffer da S. G.; Lira,Raquele M. de.
ABSTRACT The tolerance of crops to salinity is greater in hydroponic systems due to the low contribution of the matric potential to the total potential of the water. The objective of this study was to evaluate the use of brackish water, to prepare the nutrient solution and replace the evapotranspired volume, and rates of application of this solution on the water stress index, water potential, leaf succulence and water consumption of cauliflower cv. ‘Piracicaba Precoce’. The experimental design was completely randomized in a 6 x 2 factorial scheme, with six salinity levels used to prepare the nutrient solutions (0.2, 1.5, 2.5, 3.5, 4.5 and 5.5 dS m-1) and two application rates of these solutions (1.5 and 2.5 L min-1), with four replicates. Water stress...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water relations; Hydroponics; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000900622

Plant growth and solute accumulation and distribution in two sorghum genotypes, under NaCl stress
Provedor de dados: 93
Autores: LACERDA,CLAUDIVAN FEITOSA DE; CAMBRAIA,JOSÉ; CANO,MARCO ANTONIO OLIVA; RUIZ,HUGO ALBERTO.
Seedlings of two sorghum (Sorghum bicolor (L.) Moench) genotypes with differential tolerance to salinity were exposed to 0 and 100 mM NaCl, gradually added in increments of 25 mM every 12 hours, in nutrient solution. Seven days after starting the salt treatment the growth of the shoot and root system and the inorganic and organic solutes contents were determined. Salinity reduced the dry matter yield and length of the shoot and root system in both sorghum genotypes, specially in the sensitive one. In general, it was observed an increase in Na+ and Cl- transfer to the shoot, in Na+ and Cl- accumulation and in the Na+/Cl- ratio but a decrease in the K+ and Ca2+ transfer to shoot and in the K+ and Ca2+ contents in the shoot, always with higher intensity in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Salt stress; Salt accumulation; Organic solutes accumulation; Sorghum bicolor.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000300003

GAS EXCHANGE AND CHLOROPHYLL FLUORESCENCE OF CITRUS ROOTSTOCK VARIETIES UNDER SALT STRESS
Provedor de dados: 94
Autores: BRITO,MARCOS ERIC BARBOSA; SÁ,FRANCISCO VANIES DA SILVA; SOARES FILHO,WLATER DOS SANTOS; SILVA,LUDERLÂNDIO DE ANDRADE; FERNANDES,PEDRO DANTAS.
ABSTRACT  High salt concentration in water are common in Brazilian semirad region, being important to research alternatives for use this waters on crop, like use of tolerant genotypes to salinity. Thus, in order to evaluate the saline stress perception of citrus rootstocks varieties crop from gas exchange and fluorescence analysis, an experiment was realized in greenhouse at the Center for Science and Technology Agrifood, CCTA, of Federal University of Campina Grande, UFCG, Pombal, PB, Brazil. It was studied in a randomized block design with factorial scheme (2x4), two salinity levels (0.3 and 4.0 dSm-1) and four varieties of citrus rootstocks [1 -common Sunki mandarin (TSKC), 2 - Florida Rough lemon (LRF), 3 -Santa Cruz Rangpur lime (LCRSTC) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus spp.; Salinity; Physiology.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200204

CARBON ISOTOPE DISCRIMINATION IN MANGO LEAVES UNDER SALT STRESS
Provedor de dados: 94
Autores: VECCELLI,JULIANA CRISTINA; SIQUEIRA,DALMO LOPES DE.
ABSTRACT  The aim of this study was to evaluate the response of mango plants ( L) ‘Mangifera indicaTommy Atkins’ cultivar to different NaCl concentrations. In this experiment, plants were grown in pots with washed sand and nutrient solution with 0, 10, 20 and 30 mM NaCl for 120 days. After this period, young leaves from the last growth spurt were harvested in a randomized block design, dried at 65 °C for 72 h and ground in a ball mill. Samples were dried again in an oven at 60 °C for 24 h and then the relative abundance of 13C and 12C isotopes was determined using mass spectrometer Sercon 20-20 isotope ratio model. Data were used to determine the carbon isotopic discrimination (?). It was concluded that ‘Tommy Atkins’ mango trees submitted to 30 mmol L-1...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Mangifera indica; Salinity; Isotopes.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000703001

ESTABLISHMENT OF YOUNG “DWARF GREEN” COCONUT PLANTS IN SOIL AFFECTED BY SALTS AND UNDER WATER DEFICIT
Provedor de dados: 94
Autores: SILVA,ALEXANDRE REUBER ALMEIDA DA; BEZERRA,FRANCISCO MARCUS LIMA; LACERDA,CLAUDIVAN FEITOSA DE; ARAÚJO,MARIA EMÍLIA BEZERRA DE; LIMA,RONNEY MENDES MAGALHÃES DE; SOUZA,CARLOS HENRIQUE CARVALHO.
ABSTRACT  The aim was to analyze the establishment of young “Green Dwarf” coconut plants in soils affected by salts and under water stress, by evaluating leaf area, biomass production and allocation. In the experiment, conducted in protected environment in Fortaleza, CE, in statistical design of randomized blocks in a split plot arrangement, the effects of different water deficit levels (plots) were evaluated, by imposing different percentages of replacement of water losses by potential crop evapotranspiration - ETpc (20, 40, 60, 80 and 100%), associated with subplots consisting of increasing soil salinity levels (1.72, 6.25, 25.80 and 40.70 dS m-1) provided by soil collected at different parts of the Morada Nova Irrigated Perimeter - PIMN. Leaf area and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cocos nucifera L.; Initial growth; Multiple stresses; Salinity; Drought.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000303001

Growth of lulo (Solanum quitoense Lam.) plants affected by salinity and substrate
Provedor de dados: 94
Autores: Flórez,Sandra Liliana; Lasprilla,Diego Miranda; Chaves,Bernardo; Fischer,Gerhard; Magnitskiy,Stsnislav.
The effects of 0, 30 and 60 mM NaCl and substrates (red peat, sand or 3:1:1 [w/w] mixture of peat, sand, or soil) on vegetative growth of lulo, an Andean fruit species, during 12 weeks were studied. The experiment was carried out by using 2000 cm³ of polypropylene plastic pots under greenhouse conditions. Plant height, number of leaves and nodes, leaf area, total plant dry matter (DM), and shoot/root ratio were evaluated. With the increase of salt concentration, the plant height, the number of leaves and nodes, the leaf areas and plant dry mass DM decreased, whereas shoot/root ratio increased. Sand grown lulo plants were most affected by salinity and presented total mortality at 60 mM NaCl. On the other hand, plants held either in peat or in substrate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lulo; Naranjilla; Salinity; NaCl; Plant height; Leaf area; Dry matter; Peat; Sand.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000200023

Saline water for juvenile giant trahira during feed training
Provedor de dados: 96
Autores: Salaro,Ana Lúcia; Campelo,Daniel Abreu Vasconcelos; Pontes,Marcelo Duarte; Tavares,Mateus Moraes; Zuanon,Jener Alexandre Sampaio; Luz,Ronald Kennedy.
The objective of this study was to investigate the effect of different water salinities on juvenile Hoplias lacerdae during feed training. Salinity levels of 0, 3, 6 and 9 g salt L-1 were used. Juveniles (3.33±0.1 cm and 0.6±0.09 g) were stocked at a density of six fish L-1 in aquaria (10 L volume) with supplementary aeration. Weight gain, length gain, and rates of survival, mortality, and cannibalism were evaluated after 20 days. Total mortality was observed in 0 g of salt L-1. The best survival rates of 98.7 and 97.5% were recorded in 3 and 6 g of salt L-1, respectively. The greatest weight gain was recorded in fish grown in 3 g of salt L-1 followed by fish grown in 6 g of salt L-1. Length gain was similar in the 3 and 6 g salt L-1 groups. No weight or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carnivorous fish; Formulated diet; Hoplias lacerdae; Salinity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600004

Water and small ruminant production
Provedor de dados: 96
Autores: Araújo,Gherman Garcia Leal de; Voltolini,Tadeu Vinhas; Chizzotti,Mario Luiz; Turco,Silvia Helena Nogueira; Carvalho,Francisco Fernando Ramos de.
Water is a nutrient of extreme importance for animals and must be considered vital in any rearing phase. The increasing scarcity of this precious natural resource has concerned different segments of society in order to find solutions for rational and sustainable use of this nutrient. Small ruminants, especially sheep and goats, have social and economic importance due to their great ability in adapting to adverse environmental conditions and using water efficiently. Thus, they might be a good alternative to mitigate the climate change effects and to generate foreign exchange and improving life condition in many places of the world. The concept of water productivity for livestock production is relatively new and there are few studies in the world, especially...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climate changes; Goat; Salinity; Sheep; Water balance.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300036

Spatio-temporal distribution of spionids (Polychaeta-Spionidae) in an estuarine system in south-central Chile
Provedor de dados: 97
Autores: DÍAZ-JARAMILLO,MAURICIO; MUÑOZ,PAMELA; DELGADO-BLAS,VÍCTOR; BERTRÁN,CARLOS.
This study is based on the identification and distribution of spionid polychaetes in relation to abiotic characteristics of the environment at the mouth of the Valdivia-Tornagaleones estuary in south-central Chile. Four samplings were carried out in 2005, in which eight species were identified including Aquilaspio peruana, Boccardia polybranchia, Carazziella carrascoi, Dipolydora socialis, Minuspio patagónica, Rhynchospio glutaea, Scolelepis quinquedentata and Spiophanes sp. As it is typical of other estuaries in south central Chile, spionids were an important component of the macroinfauna of the Valdivia estuary. The distribution of the Spionidae family in the system showed higher species richness in the outer reach of the estuary but higher abundance...
Tipo: Journal article
Palavras-chave: Polychaeta; Spionidae; Distribution; Estuary; Salinity; Sediments; Chile.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000400005

Gas exchanges and production of colored cotton irrigated with saline water at different phenological stages
Provedor de dados: 124
Autores: Soares,Lauriane Almeida dos Anjos; Fernandes,Pedro Dantas; Lima,Geovani Soares de; Suassuna,Janivan Fernandes; Pereira,Rennan Fernandes.
ABSTRACT Scarcity of good-quality water is a limiting factor for irrigated agriculture, especially in semi-arid regions, which leads to the use of water with high salt content to irrigate crops. Therefore, this study aimed to evaluate physiological aspects and production of colored cotton genotypes under saline stress, during the different development stages and under conditions of low and high salinity. The experiment was conducted using a randomized block design, with a 3 × 7 factorial scheme and three replicates. Treatments corresponded to three colored cotton genotypes irrigated with low-salinity water (0.8 dS m-1) and high-salinity water (9.0 dS m-1): T1-A1B1C1, T2-A2B1C1, T3-A1B2C1, T4-A1B1C2, T5-A2B1C2, T6-A2B2C1 and T7-A1B2C2 (A1, B1 and C1:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypium hirsutum L.; Water scarcity; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200239

The use of Arthrospira platensis in rearing Nile tilapia (Oreochromis niloticus) in salt water
Provedor de dados: 124
Autores: Leite,Lorena Alves; Quaresma,Fabrízia da Silva; Ribeiro,Pedro Florêncio; Farias,Wladimir Ronald Lobo; Souza,Bartolomeu Warlene Silva de.
ABSTRACT Nile tilapia (Oreochromis niloticus) is a euryhaline species which, in marine systems, can provide animal protein where fresh water is scarce. As a result, adequate water management to maintain sustainability is essential, and the use of a salt water recirculating system would be an advantage at the present time. In addition, Arthrospira platensis is used in the diet of aquatic organisms, as it is rich in protein. The aim of this study, therefore, was to evaluate the use of A. platensis as a food supplement in the performance of Nile tilapia in a salt water recirculating system. The experimental model included two groups, with four replications. Each crop had a duration of 45 days (control and test), giving a total of 90 days, with the control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microalgae; Pisciculture; Recirculation; Salinity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000400593

Silicon as an attenuator of salt stress in Brachiaria brizantha ‘MG5’
Provedor de dados: 124
Autores: Silva,Maria Isabel Leite da; Nascimento,Willian Gonçalves do; Rodrigues,Carlos Ribeiro; Silva,Maria Alice Vasconcelos da; Soares,Géssica Solanna Calado.
ABSTRACT The aim of this study was to evaluate the effect of salt stress and silicon fertiliser on growth and nutritional value in Brachiaria brizantha ‘MG5’. The experimental design was completely randomised in a 4 x 5 x 3 factorial scheme with four replications; the treatments consisted of four concentrations of sodium chloride (0, 20, 40 and 60 mmol L-1), with five concentrations of silicon (0, 1, 2, 3 and 4 mmol L-1) in the nutrient solution, and three cutting periods (30, 60 and 90 days). The concentration of 4 mmol L-1 silicon minimised the detrimental effects of the sodium chloride on regrowth. However, the levels of silicon application were not sufficient to reduce the harmful effects of the sodium chloride on nutritional value or on dry-matter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Silicon fertiliser; Salinity; Pasture quality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100130

Initial development of Combretum leprosum Mart. seedlings irrigated with saline water of different cationic natures
Provedor de dados: 124
Autores: Leal,Caio César Pereira; Dantas,Nadjamara Bandeira de Lima; Torres,Salvador Barros; Vale,Amsterdam Armênio de Medeiros; Freitas,Rômulo Magno Oliveira de.
ABSTRACT This study aimed to evaluate the tolerance of C. leprosum seedlings to salt stress during the emergence and early seedling development. The experiment was carried out between the months of August and September, in a greenhouse, and the substrate used was the commercial coconut fiber wetted with aqueous solutions of sodium chloride (NaCl), calcium chloride (CaCl2) and potassium chloride (KCl) with the electrical conductivities of 0.0, 1.5, 2.5, 3.5, 4.5, 5.5 and 6.5 dS m-1. We used a completely randomized design in a 3 x 7 factorial scheme (three salts x seven levels of electrical conductivity). We evaluated seedling emergence, emergence speed index, root length, shoot length, dry matter of roots and shoots. The results indicated significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Combretaceae; Salinity; Forest seeds.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200300

Use of water from small alluvial aquifers for irrigation in semi-arid regions
Provedor de dados: 124
Autores: Burte,Julien Daniel Pierre; Coudrain,Anne; Marlet,Serge.
Water from small alluvial aquifers constitutes an attractive and low-cost option for irrigation and rural development in Northeastern Brazil. Based on piezometric measurements, geochemical analyses and electrical conductivity estimates, the present case study identified the main processes determining the hydrosaline dynamics of an alluvial aquifer in a small watershed inserted in the crystalline bedrock of a semi-arid region in Ceará and evaluated the availability of water for irrigation. Accumulation of salts in soil are related to evaporative flux from the aquifer and is increased by irrigation from the groundwater of the alluvial aquifer. The water in these aquifers may be used for irrigation, but represents a risk of soil salinization and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Groundwater; Irrigation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000300009

Water and physiological relationships of lettuce cultivated in hydroponics with brackish waters
Provedor de dados: 124
Autores: Soares,Hammady Ramalho e; Santos Júnior,José Amilton; Silva,Ênio Farias de França e; Rolim,Mário Monteiro; Silva,Gerônimo Ferreira da.
ABSTRACT Rationalization of brackish water management in hydroponic crops is one of the ways to expand and manage water supply in shortage areas. Thus, this work was carried out to evaluate the water and physiological relationships of Iceberg lettuce (cv. Tainá) in plants exposed to strategies of replacement of the evapotranspired volume of saline nutrient solutions. Two experiments were conducted in NFT hydroponic system, in which increasing levels of water salinity (0.2, 1.2, 2.2, 3.2, 4.2 and 5.2 dS m-1) were used to prepare the nutrient solutions. In the first experiment, the evapotranspired volume was replaced with the respective brackish water and, in the second one, with public-supply water (0.2 dS m-1). Both experiments were set up in a randomized...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Water management; Salinity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200216

Exogenous application of biostimulant in zucchini (Cucurbita pepo L.) subjected to salt stress
Provedor de dados: 124
Autores: Souza,Maria Williane de Lima; Oliveira,Francisco de Assis de; Torres,Salvador Barros; Souza Neta,Maria Lilia de; Sá,Francisco Vanies da Silva; Leal,Caio César Pereira.
ABSTRACT The physiological potential of seeds is one of the main factors that should be considered at the planting of a crop. This study aimed to evaluate the exogenous application of biostimulant in zucchini, cv. Caserta Italiana, under salt stress conditions. For this, the experiment was divided into two parts. The first one was carried out in the laboratory, using a completely randomized experimental design, in a 5 x 3 factorial scheme (biostimulant doses and seed soaking times), with four replicates of 25 seeds. The second one was carried out in a greenhouse, in a completely randomized experimental design, in a 2 x 6 factorial scheme with four replicates, corresponding to two levels of irrigation water salinity (0.5 and 5.0 dS m-1) and six forms of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbitaceae; Bioregulator; Seed treatment; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300413

Production, water consumption and nutrient content of Chinese cabbage grown hydroponically in brackish water
Provedor de dados: 124
Autores: Lira,Raquele Mendes de; Silva,Ênio Farias de França e; Silva,Gerônimo Ferreira da; Santos,Alexandre Nascimento dos; Rolim,Mário Monteiro.
ABSTRACTUnderground water reserves in the semi-arid region of Brazil are stored in the crystal formations that in large part have high concentrations of salt. However, the scarcity of this resource makes the use of this water necessary for various activities, including agriculture. The aim of this study was to evaluate the use of brackish water on the electrical conductivity and pH of the nutrient solution, and on the production, water consumption and the uptake of nutrients in Chinese cabbage (Brassica pekinensis L.) under a hydroponic system. The experimental design was completely randomised, with four replications and six levels of water salinity (0.2, 1.2, 2.2, 3.2, 4.2 and 5.2 dS m-1), obtained by adding NaCl to the local water supply, with this water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica pekinensis L.; Nutrient solution; Salinity; Mineral nutrition.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000300497

POTASSIUM NITRATE PRIMING TO MITIGATE THE SALT STRESS ON CUCUMBER SEEDLINGS
Provedor de dados: 22
Autores: Oliveira, Carlos Eduardo da Silva; Steiner, Fábio.
Salinity is one of the abiotic stresses that further limit the seed germination and growth of plants because of low water potential of the soil. In this study, seeds of cucumber (Cucumis sativus L., cv. Aodai Melhorado) were used to investigate the effects of potassium nitrate priming on germination and early seedling growth under different salinity levels. It was hypothesized that priming with potassium nitrate may improve seed germination and plant establishment by mitigating the negative effects of saline stress through its role in cell osmotic balance. The seeds were soaked in distilled water or in a 2 g L–1 KNO3 solution at 25 °C for 6 hours, and after drying, were distributed in plastic boxes with blotter paper containing different salt solutions...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis sativus L.; Osmopriming; Salinity; Salt tolerance; Seed germination.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/16083

Response of seeds and pollen of Onobrychis viciifolia and Onobrychis oxyodonta var. armena to NaCl stress
Provedor de dados: 63
Autores: Beyaz,Ramazan; Kaya,Gamze; Cocu,Sati; Sancak,Cengiz.
Sainfoin (Onobrychis viciifolia Scop.) is an important forage legume crop with 52 species adapted to dry and poor soils in Turkey, but little is known about the effects of salinity on germination and seedling growth in arid and semiarid regions suffering from salinity problem. The seeds and pollen of two species of sainfoin O. viciifolia and O. oxyodonta var. armena (Syn: O. armena) were exposed to 0, 5, 10, 20 and 30 dS m-1 of NaCl under in vivo and in vitro conditions and evaluated for germination under salt stress by comparing germination percentage, mean germination time, root and shoot length, fresh and dry seedling weight and dry matter. Increased salinity levels generally resulted in decrease in all traits except time to germination, dry seedling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: In vivo; In vitro; Sainfoin; Salinity; Germination.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400013

Accumulation of organic and inorganic solutes in NaCl-stressed sorghum seedlings from aged and primed seeds
Provedor de dados: 63
Autores: Oliveira,Alexandre Bosco de; Alencar,Nara Lídia Mendes; Prisco,José Tarquinio; Gomes-Filho,Enéas.
Although it has been known that the seed's physiological potential affects its response to osmoconditioning and abiotic stresses, researches involving seed aging and priming associated to abiotic stresses are scarce. The aim of this work was to evaluate the role of seed priming on salt tolerance in sorghum seedlings from seeds with two vigor levels (aged or non-aged) and to verify the organic and inorganic solute contributions as osmoregulators in NaCl-stressed seedlings from aged and primed seeds. The combinations of two seed vigor levels (aged or not), two seed types (primed or not) and two salinity levels (exposed to NaCl at 100 mM or not) were evaluated. In low physiological quality seeds (aged seeds), priming provided an attenuation of salinity's...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum bicolor; Accelerated aging; Priming; Salinity; Osmoregulation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000600004

Supplemental irrigation using brackish water on maize in tropical semi-arid regions of Brazil: yield and economic analysis
Provedor de dados: 63
Autores: Cavalcante,Eduardo Santos; Lacerda,Claudivan Feitosa de; Costa,Raimundo Nonato Távora; Gheyi,Hans Raj; Pinho,Luciana Luzia; Bezerra,Francisco Mardones Sérvulo; Oliveira,Adriana Cruz de; Canjá,Juvenaldo Florentino.
ABSTRACT: Supplemental irrigation during dry spells could reduce maize yield losses in tropical semi-arid regions, notably in small farms. However, good quality water reserves are not sufficient to meet the demands of farming communities. Consequently, our objective was to evaluate the productivity and profitability of maize under different simulated rainfall scenarios, with and without supplemental irrigation (SI) with brackish water. The field experiments were carried out during the cropping seasons of 2018 and 2019 on Ultisol. The experiment followed a randomized block design in the split-plot scheme with four replicates. The plots were formed by simulating the water supply in the soil corresponding to four water scenarios (rainy, normal, drought and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rainfed farming; Salinity; Supplementary irrigation; Biosaline agriculture.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000700601

Yield and fruit quality of industrial tomato under saline irrigation
Provedor de dados: 63
Autores: Campos,Carlos Alberto Brasiliano; Fernandes,Pedro Dantas; Gheyi,Hans Raj; Blanco,Flávio Favaro; Gonçalves,Cira Belém; Campos,Selma Aparecida Ferreira.
Industrial tomato is the most important vegetable crop of the Brazilian agribusiness. Few researches have evaluated the tolerance of this crop to saline stress. In this study, the effects of five levels of salinity of the irrigation water (1, 2, 3, 4, and 5 dS m-1) and two equivalent proportions of Na:Ca:Mg (1:1:0.5 and 7:1:0.5) were tested on yield and quality of fruits of industrial tomato, cultivar IPA 6. Seedlings were transplanted in rhizotrons and grown under plastic covering until fruit ripening. Volume of water for daily irrigations was determined by the difference between the applied and drained volume in the previous irrigation. Unitary increase of water salinity above 1 dS m-1 reduced the commercial and total yield by 11.9 and 11.0%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum Mill.; Salinity; Pulp yield; Water quality; Sodium.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200006

Total soil electrical conductivity and critical soil K+ to Ca2+ and Mg2+ ratio for potato crops
Provedor de dados: 63
Autores: Reis Jr.,Roberto Anjos; Fontes,Paulo Cezar Rezende; Neves,Júlio Cesar Lima; Santos,Nerilson Terra.
Soil K+ to Ca2+ and Mg2+ ratio as well as the total salinity were evaluated in response to potassium fertilizer application onto potato. Potassium was applied at six different rates (0, 60, 120, 240, 480 and 960 kg ha-1 of K2O), as K2SO4, and was placed during planting time in the furrow. Soil from the 0-200 mm layer was collected in the furrow, 20 and 48 days after plant emergence (DAE) to evaluate soil pH, K+, Ca2+ and Mg2+ contents and the total electrical conductivity (EC). A factorial design (6x2), with six K rates and two sampling times was set up in a randomized block design with four replications. The application of K fertilizer increased exchangeable K, did not affect pH and exchangeable Ca and Mg contents, but caused a linear increase of the soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum; Potassium; Calcium; Magnesium; Salinity.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000400030

Seed priming with hormones does not alleviate induced oxidative stress in maize seedlings subjected to salt stress
Provedor de dados: 63
Autores: Carvalho,Rogério Falleiros; Piotto,Fernando Angelo; Schmidt,Daiana; Peters,Leila Priscila; Monteiro,Carolina Cristina; Azevedo,Ricardo Antunes.
Seed priming with hormones has been an efficient method for increasing seed vigor as well as seedling growth under stressful conditions. These responses have in the past been attributed to the activation of antioxidant systems in a range of crops. The results described in this work show that hormonal priming with methyl jasmonate, salicylic acid or CEPA (chloroethylphosphonic acid), an ethylene (ET) releaser, does not induce the antioxidant activity of superoxide dismutase, catalase, ascorbate peroxidase or glutathione reductase in maize seedlings subjected to salt stress. The enhanced biomass of maize seedlings under salt stress that was observed only from ET priming indicates that the stress tolerance in maize from ethylene priming is a fundamental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Antioxidant systems; Hormonal pretreatment; Salinity; Seedling growth.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500014

Salt stress induced damages on the photosynthesis of physic nut young plants
Provedor de dados: 63
Autores: Silva,Evandro Nascimento da; Ribeiro,Rafael Vasconcelos; Ferreira-Silva,Sérgio Luiz; Viégas,Ricardo Almeida; Silveira,Joaquim Albenisio Gomes.
Salinity is a major limiting factor to crop productivity in the world especially in semiarid regions. The aim of this study was to evaluate the photosynthetic resistance of Jatropha curcas (L.) young plants subjected to salt stress. The experiment was carried out in a completely randomized design with treatments in a 2 x 3 factorial: two NaCl levels (0 and 100 mmol L-1) and three harvest times: 7 and 14 days of salt exposure and three days of recovery. Leaf Na+ and Cl-concentrations and the K+/Na+ ratios, after seven days of salt exposure, did not reach ionic toxic levels, suggesting that the NaCl-induced osmotic effects prevailed over the ionic ones. Under this condition, the salt stress caused reduction in leaf gas exchange parameters, such as CO2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha curcas; Chlorophyll fluorescence; Gas exchange; Ionic toxicity; Salinity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000100010

Salicylic acid ameliorates the adverse effect of salt stress on strawberry
Provedor de dados: 63
Autores: Karlidag,Huseyin; Yildirim,Ertan; Turan,Metin.
Strawberry is considered as a salinity sensitive species and is adversely affected in response to the salt stress in terms of growth and yield. Pot experiments were conducted to determine the effect of exogenous salicylic acid (SA) application on physiology, growth, chlorophyll and mineral content of strawberry grown under salt stress and greenhouse conditions. Strawberry plants were treated with SA at different concentrations (0.0, 0.25, 0.50 and 1.00 mM). Salinity treatments were established by adding 0 and 35 mM of NaCl to a base complete nutrient solution. Salt stress negatively affected the growth, chlorophyll content and mineral uptake of strawberry plants. However, plants treated with SA often had greater shoot fresh weight, shoot dry weight, root...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Growth; Mineral content.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200006

Behaviour and orcadian rhythm of the fish bathygobius soporator Valenciennes (Gobiidae) under the influence of environmental salinity and temperature
Provedor de dados: 104
Autores: Fanta,Edith.
The behavioural patterns and their cireadian rhythms may be adaptive to the peculiar environmental conditions of subtropical brackish waters where Ba-thygobius soporator Valenciennes, 1837 live. Adult fish were caught at the southern Brazilian coast from mangrove rivers and rocky shores in a bay, where temperature and water salinity vary during the day and through the year. Observation on the behaviour of the animals was undertaken in salinity 8.5ppt, 17.0ppt, 25.5ppt and 34.0ppt, each one in temperatures of 18ºC and 28ºC. Temperature and salinity affect the frequency and intensity of some of the behavioural events, more than its pattern or rhythm. Swimming is rare, decreasing along the day and with temperature increase, being even lower at low salinity;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bathygobius soporator; Fish; Behaviour; Cireadian rhythm; Salinity; Temperature.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100021

Spatial distribution of the Ocypode quadrata (Crustacea: Ocypodidae) along estuarine environments in the Paranaguá Bay Complex, southern Brazil
Provedor de dados: 104
Autores: Rosa,Leonardo C. da; Borzone,Carlos A.
This study examines the spatial distribution of the ghost crabs, Ocypode quadrata Fabricius, 1787, in thirteen estuarine sandy beaches located along two main axes of the Paranaguá Bay Estuarine Complex, southern Brazil. Burrow densities of ghost crabs were measured at three beach levels established around the high tide mark during the summer and winter of 2005. All beaches showed a steep beach face slope (2.6 to 8.3º) with sediment composition varying from well sorted fine sand to very poorly sorted coarse sand towards the upper estuary. Water salinity ranged from around 31 at those beaches near the bay inlet, to 14 at beaches in the inner estuary. The burrow densities of O. quadrata in the estuarine beaches were similar to those observed in the oceanic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuarine sandy beaches; Low-energy environments; Management and conservation; Salinity; Zonation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000300001

Variation in environmental characteristics of waters among Amazon coast oyster culture units
Provedor de dados: 36
Autores: SAMPAIO,Dioniso de Souza; SANTOS,Maria de Lourdes Souza; TAGLIARO,Claudia Helena; BEASLEY,Colin Robert.
ABSTRACT Oyster culture has benefited traditional coastal communities along the Amazon macrotidal mangrove coast of Pará state in Brazil since 2006. Currently, seven oyster culture units in five municipalities are expanding production, but with no environmental monitoring, which is important for the control of the impacts of oyster culture on waters as well as for oyster management and conservation. Seasonal variation in environmental characteristics of the water was evaluated at all oyster culture units in Pará, from September to November 2013 (dry season) and February to April 2014 (wet season), to generate baseline data to evaluate future impacts and aid strategic planning, such as diversifying seed production. Salinity, dissolved oxygen, pH,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical mariculture; Crassostrea; Salinity; Water quality.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400295

TEMPORAL VARIATION IN THE ABUNDANCE OF Poblana alchichica IN NEAR-SHORE HABITAT OF THE HIGH ELEVATION LAKE, LAGO DE ALCHICHICA, PUEBLA, MEXICO
Provedor de dados: 37
Autores: WOOLRICH-PIÑA,GUILLERMO A; GEOFFREY R,SMITH; LEMOS-ESPINAL,JULIO A; MONTOYA-AYALA,RAYMUNDO; ÁVILABOCANEGRA,LUIS E; BENAVIDES GARDUÑO,EDUARDO.
The distribution and abundance of organisms within a pond or lake can reflect the result of a variety of factors. We examined the abundance of the endemic fish, Poblana alchichica, in Lago de Alchichica, Puebla, Mexico, as well as how the abundance varied among months. Dissolved oxygen, temperature, and salinity varied among months. The abundance of Poblana alchichica peaked in December and February. For the months when fish were observed, their abundances were positively related to dissolved oxygen concentration and were generally not related to temperature. Our results provide evidence that there is substantial seasonal variation in the abundances of Poblana alchichica and that within months, their distributions are likely driven by dissolved oxygen than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Dissolved oxygen; Poblana alchichica; Salinity; Seasonal variation; Temperature.
Ano: 2012
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2012000100015

RESPONSE TO in vitro SALT STRESS IN SUGARCANE IS CONDITIONED BY CONCENTRATION AND CONDITION OF EXPOSURE TO NaCI
Provedor de dados: 37
Autores: CAVALCANTE GRANJA,Manuela Maria; LACERDA E MEDEIROS,Maria Jaislanny; MEDEIROS DE ANDRADE SILVA,Marina; CAMARA,Terezinha; WILLADINO,Lilia; ULISSES,Claudia.
ABSTRACT Salinity is one of the major environmental stress factors that affect crop productivity, as well as interfering with plant growth and development, resulting in reduced production quality. Given this, we highlight the importance of research in response to plants subjected to salt stress in order to assess the physiological and biochemical behavior of genotypes, with the objective of selecting the more tolerant. One way to ensure the uniformity of the response of the plants is through in vitro cultivation, which allows control of the cultivation conditions. Therefore, the objective of this work was to evaluate the response of two commercial varieties of sugar cane exposed to saline stress in different conditions (gradual and abrupt). Two varieties...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant enzymes; In vitro culture; Oxidative stress; Salinity.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2018000100030

IMPROVING THE TOLERANCE OF Vicia faba AGAINST ENVIRONMENTAL SALINITY RESULTED FROM THE IRRIGATION WITH SEA WATER BY USING KNO3 AND (NH4)2SO4 AS CHEMICAL OSMOREGULATORS
Provedor de dados: 37
Autores: MOHAMED,KAMEL.
The familiar solutes, Na+, K+, Ca2+, Mg2+, Cl-, PO4(3-), SO4(2-), soluble carbohydrates, amino acids and soluble proteins, which play a role in osmotic adjustment were estimated to investigate the role of potassium nitrate and ammonium sulphate as osmoregulators and their effects on the solutes composition. Vicia faba L. was cultivated and irrigated with 5, 10, 15 and 20 % (v:v) sea water. The plants were divided to three groups. The first was irrigated with sea water only. The second was treated with 5 mM KNO3 while the third was treated with 5mM (NH4)2SO4. The plants were left to grow until flowering stage. The results indicated that the non treated group increased the soluble carbohydrates in the roots to avoid the influx of sodium. The treatment with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Osmoregulation; Irrigation; Salinity; Sea water; Vicia faba.
Ano: 2012
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2012000200006

EFFECT OF FOLIAR APPLICATION OF AMINOACIDS ON PLANT YIELD AND SOME PHYSIOLOGICAL PARAMETERS IN BEAN PLANTS IRRIGATED WITH SEAWATER
Provedor de dados: 37
Autores: SH SADAK,Mervat; ABDELHAMID,Magdi T; SCHMIDHALTER,Urs.
Salinity decreases yield in arid and semi-arid areas. With increasing demand for irrigation water, alternative sources are being sought. Seawater salinity was previously considered unusable for irrigation. However, this water can be used successfully to grow crops under certain conditions. Amino acids is well known biostimulant which has positive effects on plant growth and yield, and significantly mitigates the injuries caused by abiotic stresses. Therefore, in the present study, the effect of exogenously treatment amino acid on faba bean plant growing under seawater salt stress was investigated. Reduction of salinity damage in faba bean by using a mixture of amino acids to improve morphological and biochemical parameters, and thus raising the level of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Free amino acids; Photosynthetic pigments; Proline; Salinity; Vicia faba.
Ano: 2015
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100015

IMPACT OF FOLIAR APPLICATION OF ASCORBIC ACID AND α-TOCOPHEROL ON ANTIOXIDANT ACTIVITY AND SOME BIOCHEMICAL ASPECTS OF FLAX CULTIVARS UNDER SALINITY STRESS
Provedor de dados: 37
Autores: EL-BASSIOUNY,Hala M.S; SADAK,Mervat Sh.
The interactive effects of saline water (2000, 4000 and 6000 mg/l) and foliar application of 400 mg/l of ascorbic acid (Asc) or α- tocopherol (α-Toco) on three flax cultivars (Sakha 3, Giza 8 and Ariane) were conducted during two successive seasons 2011/2012 and 2012/2013. The results showed that total soluble carbohydrates, free amino acids and proline contents were significantly increased with increasing salinity levels in the all three tested cultivars except free amino acid content of Giza 8 which showed insignificant decrease. While, nucleic acids (DNA and RNA) showed significant decreases compared with the corresponding control. Moreover, applications of vitamins (Asc or α-Toco) as foliar spraying increased all mentioned contents compared to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant enzymes; Flax; Lipid peroxidation; Protein profile; Salinity; Α-Toco.
Ano: 2015
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000200021

Germination responses of Lycium humile, an extreme halophytic Solanaceae: understanding its distribution in saline mudflats of the southern Puna
Provedor de dados: 39
Autores: Palchetti,María Virginia; Llanes,Analía; Reginato,Mariana; Barboza,Gloria; Luna,Virginia; Cantero,Juan José.
ABSTRACT Although knowledge about halophytic Solanaceae is scarce, it is known that several species within genus Lycium tolerate salinity. Lycium humile grows in highly saline soils in mudflats near saline Andean lakes. This study evaluated the germination responses of L. humile under different scarification methods, photoperiods, temperatures and saline conditions and, simultaneously, tested seedling survival under different iso-osmotic conditions. Dormancy and germination were found to be regulated by interactions with different factors, with the highest germination percentages being obtained by immersion in sulfuric acid, with a temperature of 25 °C and a temperature regime of 5/25 °C, under which seeds were neutrally photoblastic. As osmotic potential...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Andes; Halophyte; Lycium humile; Puna; Salinity; Salt tolerance; Solanaceae.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300540

The effects of salinity on growth and survival of mangrove seedlings changes with age
Provedor de dados: 39
Autores: Kodikara,Kodikara Arachchilage Sunanda; Jayatissa,Loku Pullukuttige; Huxham,Mark; Dahdouh-Guebas,Farid; Koedam,Nico.
ABSTRACT Six wide-ranging mangrove species, Rhizophora apiculata, R. mucronata, Avicennia marina, A. officinalis, Bruguiera gymnorrhiza, and B. sexangula, were selected to study the growth and survival of seedlings under three contrasting salinity treatments over a 30-week period: low (3-5psu), moderate (15-17psu) and high (33-36psu). Seedlings grown under high salinity exhibited significantly lower performance (p&lt;0.05) in survival rates, cumulative shoot height, mean growth rates, mean total leaf area, and mean dry weight, compared to those under low and moderate salinity regimes. The low salinity treatment provided the best conditions for initial establishment and growth of the seedlings of all species until 15-20 weeks of age. However, the same...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avicennia; Bruguiera; Early growth; Mangroves; Nursery; Planting; Rhizophora; Salinity; Sri Lanka; Survival.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100037

Effects that nutritional and saline gradients have on the growth of Passiflora mucronata Lam. and Canavalia rosea (Sw.) DC. found in the restinga of Brazil
Provedor de dados: 39
Autores: Lourenço Junior,Jehová; Zambom,Oberdan; Rossi,Magda Santos; Cuzzuol,Geraldo Rogério Faustini.
Salinity and fertility are the main factors cited in Within the restinga (coastal woodland) biome in Brazil, the positioning of Canavalia rosea and Passiflora mucronata occur, respectively, near the shore-in the creeping psammophyte formation (CPF) - and far from the shore - in the Palmae formation (PF). The hypothesis that such positioning is related to salinity and fertility was tested by applying a salt gradient (increasing solutions of NaCl) and a nutritional gradient (different proportions of Hoagland solution). Neither species survived in solutions over 200 mM of NaCl. The shoots of P. mucronata showed negative growth (lower dry mass) in the first week of exposure to saline solutions. The roots of C. rosea showed great sensitivity to salinity, which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coastal ecosystems; Fabaceae; Fertility; Nutrition; Passifloraceae; Salinity; Spatial distribution.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200008

Effects of salinity on the physiology of the red macroalga, Acanthophora spicifera (Rhodophyta, Ceramiales)
Provedor de dados: 39
Autores: Pereira,Débora Tomazi; Simioni,Carmen; Filipin,Elisa Poltronieri; Bouvie,Fernanda; Ramlov,Fernanda; Maraschin,Marcelo; Bouzon,Zenilda Laurita; Schmidt,Éder Carlos.
ABSTRACT Salinity is an important abiotic factor since it is responsible for the local and/or regional distribution of algae. In coastal regions, salinity changes with prevailing winds, precipitation and tide, and particularly in extreme intertidal conditions. Acanthophora spicifera is a red seaweed that occurs in the supratidal region in which changes in abiotic conditions occur frequently. This study evaluated the effects of salinity on the metabolism and morphology of A. spicifera. Algae were acclimatized under culture conditions with sterilized seawater for seven days. Experiments used different salinities (15 to 50 psu) for seven days, followed by metabolic analyses. This study demonstrates that extreme salinities affect physiological parameters of A....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acanthophora spicifera; Microscopy; Morphology; Physiology; Salinity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400555

Soil water and salinity balance on banana irrigated with water of varied salinity - DOI: 10.4025/actasciagron.v31i1.6600
Provedor de dados: 1
Autores: Gondim, Ancélio Ricardo de Oliveira; UNESP; Medeiros, José Francismar de; UFERSA; Levien, Sérgio Luís Aguilar; UFERSA; Carmo, Gilcimar Alves do; EAFE-CE; Senhor, Rosemberg Ferreira; UFRPE.
The objective this work was to evaluate the advisory use of two cultivars of banana and the salinity of the soil in different water salinity levels (0.55; 1.70; 2.85 and 4.00 dS m-1) during the reproductive phase. The experimental design chosen was completely randomized in subdivided plots, totaling eight treatments with four repetitions per treatment. The salinity levels were obtained from natural waters of wells from sandstone and calcareous aquifers and were mixed in masonry tanks in order to obtain the desired salinity concentrations. It was verified that the area of the bulb with moisture greater than 8% represents approximately 50% of the volume of the soil. The evapotranspiration of the culture decreased with the increase in the salinity among the...
Palavras-chave: Banana culture; Salinity; Irrigation 5.03.00.00-8 Engenharia Agrícola bananicultura; Salinização; Irrigação.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6600

Bell pepper production under saline stress and fertigation with different K+/Ca2+ ratios in a protected environment
Provedor de dados: 1
Autores: Silva, Ricardo Carlos Pereira da; Oliveira, Francisco de Assis de; Oliveira, Ademar Pereira de; Medeiros, José Francismar de; Alves, Rita de Cássia; Paiva, Francisco Italo Gomes.
Bell peppers are sensitive to salinity; therefore, it is necessary to find alternatives to reduce saline stress. An experiment was conducted in a greenhouse at Federal Rural University of the Semi-Arid Region, in Mossoró, Rio Grande do Norte State, Brazil, to evaluate the effects of salinity and K+/Ca2+ ratios on bell pepper production. The experimental design consisted of randomized blocks in a 5 x 4 factorial scheme with four replicates, corresponding to five K+/Ca2+ ratios (F1 = 3.3/1, F2 = 2.8/1, F3 = 2.2/1, F4 = 1.8/1, and F5 = 1.5/1) and four salinity levels in the nutrient solution using NaCl (1.75, 3.25, 4.75, and 6.25 dS m-1). The following parameters were evaluated: the number of fruits (total, marketable and unmarketable), the mean weight of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum L.; Salinity; Potassium; Calcium; Soilless culture. Capsicum annuum L.; Salinity; Potassium; Calcium; Soilless culture.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42498

Osmoregulation in tropical zoanthid Protopalythoa variabilis (Cnidaria: Anthozoa) - doi: 10.4025/actascibiolsci.v35i1.10970
Provedor de dados: 3
Autores: Soares, Marcelo de Oliveira; Universidade Federal do Ceará; Souza, Leonardo Peres de; Universidade Federal do Ceará.
This study evaluated the physiological, morphological and ethological effects of salinity variations on the tropical zoanthid Protopalythoa variabilis. This zoanthid was submitted to different salinity levels to probe the hypothesis of osmoregulation. Specimens collected in beach rocks from Northeastern Brazil were taken alive to the laboratory in their original water. The osmoregulatory ability of P. variabilis can be determined by measuring the hemolymph osmolality under various salinity conditions and comparing with the osmolality of the medium. The zoanthid P. variabilis is a “weak regulator”, as it only osmoregulates within a narrow range of external salinity values, and its hemolymph osmolality drops, approximately in parallel with the isosmotic...
Tipo: Estudos morfológicos e fisiológicos
Palavras-chave: 2.07.00.00-8    Fisiologia anthozoan; Salinity; Physiology; Reefs 2.07.00.00-8    Fisiologia.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10970

The compensatory effect of glutathione on alleviating salinity–induced modulations in growth and biochemical traits in maize irrigated with diluted seawater
Provedor de dados: 111
Autores: El-Shahawy, Tarek Abd El-Ghafar.
Salinity stress has recently received much attention as an object worthy of research and interest. It is a great challenge for the future global agricultural production that aspires to a large-scale conversion of raw seawater to irrigation use. Our study aims to investigate the antioxidant and free radical scavenging effect of glutathione (GSH) that would enhance maize tolerance to the destructive effect of salinity. A greenhouse trail was conducted in this context during the summer season of 2015 using two salinity (Mediterranean seawater: 3000 and 6000 ppm) and GSH (100 and 200 pm) levels. Tap water was used as a control. Individually, saline water acted in a distinctly different manner than GSH. Irrigation with diluted seawater caused morphological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant physiology; Environmental stresses Antioxidants; Oxidative stress; Reactive oxygen species (ROS); Salinity; Tolerance; Zea mays.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4393

Evaluation of chloride mass balance and recharge in agricultural lands in Nigeria
Provedor de dados: 111
Autores: Sobowale, A; Ramalan, A A; Mudiare, O J; Oyebode, M A.
Groundwater salinization studies and recharge estimation was carried out at the Irrigation Research Station, Kadawa, Nigeria. Groundwater samples from fifteen randomly selected piezometer locations were analyzed monthly for chloride using Mohr’s method for three years while recharge was estimated using the chloride mass balance (CMB) method. Groundwater chloride range from 22 - 91.4 mg/l, seasonal trend was identified with the hot dry season (April – June) having higher values than the wet season (July – October). Correlation analysis revealed chloride status that is not associated with one another in all soil types while salt build up was observed at the south western tip of the farmland indicating potential reduction of agricultural productivity. CMB...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Groundwater Hydrology and irrigation irrigation; Groundwater; Chloride mass; Recharge; Water management; Salinity.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3213

Evaluation of chloride mass balance and recharge in agricultural lands in Nigeria
Provedor de dados: 111
Autores: A Sobowale; Department of Agricultural and Bio-Resources Engineering, Federal University of Agriculture, Abeokuta, Nigeria; A A Ramalan; O J Mudiare; M A Oyebode.
Groundwater salinization studies and recharge estimation was carried out at the Irrigation Research Station, Kadawa, Nigeria. Groundwater samples from fifteen randomly selected piezometer locations were analyzed monthly for chloride using Mohr’s method for three years while recharge was estimated using the chloride mass balance (CMB) method. Groundwater chloride range from 22 - 91.4 mg/l, seasonal trend was identified with the hot dry season (April – June) having higher values than the wet season (July – October). Correlation analysis revealed chloride status that is not associated with one another in all soil types while salt build up was observed at the south western tip of the farmland indicating potential reduction of agricultural productivity. CMB...
Palavras-chave: Groundwater Hydrology and irrigation irrigation; Groundwater; Chloride mass; Recharge; Water management; Salinity.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3213

Effect of salt stress on physiology and agronomy characterstic of barley cultivars
Provedor de dados: 111
Autores: sorkhi, farshad.
In most northwest provinces of Iran such as West Azarbaijan province, soil salinity is a growing problem, particularly in irrigated agricultural areas, and has been found to reduce barley yield, dramatically. To investigate the effect of sodium chloride on two barley (Hordeum vulgare) cultivars, four levels of salinity: 0, 4, 8 and 12 dS/m, were employed as a factorial experiment arranged in a completely randomized design with three replications in a controlled environment of the greenhouse during 2017-2018. The results indicated that increasing salinity from 0 to 12 dS/m, decreased the emergence percentage significantly. Two cultivars of Zarjoo and Valfajr responded differently to salinity, so that Zarjoo showed a significantly higher emergence rate. This...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Emergence; Potassium; Proline; Salinity; Yield components.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5855

Seasonal variation in the copepod community structure from a tropical Amazon estuary, Northern Brazil
Provedor de dados: 42
Autores: Magalhães,André; Leite,Natália da R.; Silva,João G.S.; Pereira,Luci C.C.; Costa,Rauquírio M. da.
The main purpose of this study was to investigate the seasonal variation of copepod community structure during the months of July, September and November 2003 (dry season) and January, March and May 2004 (rainy season) in the Curuçá estuary, northern Brazil. Samples were collected during neap tides via gentle 200µm mesh net tows from a small powerboat. Measurements of surface water conductivity were accomplished in situ using an electronic conductivimeter and salinity was later obtained through the transformation of the conductivity values. Salinity varied seasonally from 7.2 ± 0.1 to 39.2 ± 1.8 (mean ± standard deviation) and was influenced mainly by differences in the amount of rainfall between the studied sampling seasons. In total, 30 Copepoda taxa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Copepod; Salinity; Ecological indexes; Seasonal changes; Brazil.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000200005

Influence of temperature and conductivity on the life-history characteristics of a pampean strain of Brachionus plicatilis
Provedor de dados: 42
Autores: FERRANDO,NOELIA S.; CLAPS,MARÍA C.; BENÍTEZ,HERNÁN H.; GABELLONE,NÉSTOR A.
ABSTRACT In the present work, we provide the first approach about the life-history of Brachionus plicatilis in South America. We tested with laboratory experiments the response of the pampean strain of B. plicatilis for two of its main stressors (conductivity and temperature). We evaluated the effects of eight conductivity values from 1 to 17 mS.cm-1 and two temperatures (15 and 25 °C) to compare its abundance with those obtained in the pampean lotic and lentic environments, where this rotifer is frequent or dominant. The results demonstrated that the increase in population-growth rate and the peak of abundance occurred at the highest temperature and at medium conductivity. Minimum values were obtained at the lowest temperature and conductivities analyzed,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euryhaline rotifer; Experimental cultures; Growth rate; Salinity; Temperature.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401431

Golden mussel Limnoperna fortunei (Bivalvia: Mytilidae) distribution in the main hydrographical basins of Uruguay: update and predictions
Provedor de dados: 42
Autores: Brugnoli,Ernesto; Clemente,Juan; Boccardi,Lucía; Borthagaray,Ana; Scarabino,Fabrizio.
Limnoperna fortunei, an Asiatic rivers bivalve has become a worldwide problematic invasive species causing several water quality and macrofouling problems. In the Neotropical region it was first recorded in 1991 in the Río de la Plata coast, Buenos Aires province. Since this, it showed a quick upstream invasion into the principals aquatic systems of the Plata Basin. Nevertheless, there is not a study about its invasion and distribution process in aquatic systems of Uruguay. We describe the new records of Limnoperna fortunei in Uruguayan coast of Río de la Plata, Santa Lucía, Negro and Uruguay Rivers. With these results we aim to estimate its distributional limits for Uruguay main hydrographical basins. We also deal with the role of salinity as the main...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Invasive mollusk; Biogeography; Salinity; Uruguay.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000200004

Effect of osmopriming on germination and initial growth of Physalis angulata L. under salt stress and on expression of associated genes
Provedor de dados: 42
Autores: SOUZA,MANUELA O. DE; PELACANI,CLAUDINÉIA R.; WILLEMS,LEO A.J.; CASTRO,RENATO D. DE; HILHORST,HENK W.M.; LIGTERINK,WILCO.
ABSTRACT This study aimed to evaluate the effects of priming on seed germination under salt stress and gene expression in seeds and seedlings of P. angulata L. After priming for 10 days, seed germination was tested in plastic trays containing 15 ml of water (0 dS m-1 - control) or 15 ml of NaCl solution (2, 4, 6, 8, 10, 12, 14 and 16 dS m-1). Fresh and dry weight of shoots and roots of seedlings were evaluated at 0, 2, 4, 6, 8 dS m-1. Total RNA was extracted from whole seeds and seedlings followed by RT-qPCR. The target genes selected for this study were: ascorbate peroxidase (APX), glutathione-S-transferase (GST), thioredoxin (TXN), high affinity potassium transporter protein 1 (HAK1) and salt overly sensitive 1 (SOS1). At an electroconductivity of 14 dS...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: RT-qPCR; Germinability; Seedling growth; Salinity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200503

The significance of cortisol on acclimation to salinity in pejerrey Odontesthes bonariensis
Provedor de dados: 45
Autores: Tsuzuki,M.Y.; Ogawa,K.; Strüssmann,C.A.; Maita,M.; Takashima,F.; Melo,C.M.R.
The role of cortisol on the osmoregulation of pejerrey Odontesthes bonariensis at different salinities was investigated in adult fish injected with 0.7mg hydrocortisone per 100g body weight of fish, and transferred to 0, 5 and 20ppt of NaCl. Blood cortisol was 566ng/ml at the beginning of the experiment (0h) but surged to 1250ng/ml within 3h in cortisol-injected fish. Cortisol levels were influenced not only by treatment but also by time, being higher at 3h compared to 24h. Salinity level, time of exposure and their interaction, but not cortisol treatment, significantly affected plasma osmolality and the concentration of ions Cl- and Na+. This study showed that exogenous cortisol does not seem to play a significant role on the regulation of plasma...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pejerrey; Odontesthes bonariensis; Cortisol; Osmoregulation; Salinity.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000500030

Statistical studies on anatomical modifications in the radicle and hypocotyl of cotton induced by NaCl
Provedor de dados: 48
Autores: CASENAVE,ESTER C; DEGANO,CLAUDIA AM; TOSELLI,MARIA E; CATAN,ESTELA A.
Salinity affects extensive arid and semiarid areas all over the world, producing diminished yields of many crops. Even though there is a variety of research and reviews related to physiological and anatomical modifications produced in salinity-tolerant species, today there are different points of view in relation to this topic, and especially due to technical limitations, there are few articles in which anatomical modifications have been quantified. The aim of this research is to quantitatively and statistically evaluate the modifications that are produced in radicles and hypocotyles of cotton seedlings growing in NaCl concentrations that affect the early ontogenetic stages of this crop. Germination of two varieties of cotton at increasing concentrations...
Tipo: Journal article
Palavras-chave: Anatomical changes; Cotton; Germination; Growth; Salinity.
Ano: 1999
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97601999000400008

Salinity-induced changes in the morphology and major mineral nutrient composition of purslane (Portulaca oleracea L.) accessions
Provedor de dados: 48
Autores: Alam,Md. Amirul; Juraimi,Abdul Shukor; Rafii,M. Y.; Hamid,Azizah Abdul; Aslani,Farzad; Hakim,M. A.
This study was undertaken to determine the effects of varied salinity regimes on the morphological traits (plant height, number of leaves, number of flowers, fresh and dry weight) and major mineral composition of 13 selected purslane accessions. Most of the morphological traits measured were reduced at varied salinity levels (0.0, 8, 16, 24 and 32 dS m-1), but plant height was found to increase in Ac1 at 16 dS m-1 salinity, and Ac13 was the most affected accession. The highest reductions in the number of leaves and number of flowers were recorded in Ac13 at 32 dS m-1 salinity compared to the control. The highest fresh and dry weight reductions were noted in Ac8 and Ac6, respectively, at 32 dS m-1 salinity, whereas the highest increase in both fresh and dry...
Tipo: Journal article
Palavras-chave: Purslane (Portulaca oleracea L.); NaCl; Salinity; Morphology; Mineral compositions.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602016000100024

In vitro response of date palm (Phoenix dactylifera L.) to K/Na ratio under saline conditions
Provedor de dados: 48
Autores: Alkhateeb,Suliman A; Alkhateeb,Abdullatif A; Solliman,Mohei EL-Din.
BACKGROUND: Salinity is a serious factor limiting the productivity of agricultural plants. One of the potential problems for plants growing under saline conditions is the inability to up take enough K+. The addition of K+ may considerably improve the salt tolerance of plants grown under salinity. It is assumed that increasing the K+ supply at the root zone can ameliorate the reduction in growth imposed by high salinity. The present study aims to determine whether an increase in the K/Na ratio in the external media would enhance the growth of date palm seedlings under in vitro saline conditions METHODS: Date palm plants were grown at four concentrations of Na + K/Cl (mol/m³) with three different K/Na ratios. The 12 salt treatments were added to modified MS...
Tipo: Journal article
Palavras-chave: Date palm; In vitro; Ion relations; K/Na ratio; Salinity.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100063

Composition, abundance and biomass of a fish assemblage in a southern Brazilian coastal stream during polyhaline/euhaline condition
Provedor de dados: 49
Autores: Quintela,Fernando Marques; Corrêa,Fabiano; Gava,Adriana.
Abstract: The coastal streams of southernmost Brazil, Rio Grande do Sul state, are marked by a period of regular marine intrusion resultant from intense oceanic winds. In the present study we aimed to investigate the species composition, abundance and relative biomass of the ichthyofauna in the lower stretch of a coastal stream during summer, a period of regular marine intrusion. Estreito is a coastal hydrological complex composed by lakes, swamps and a perennial stream, located at the central-south portion of the coastal plain of Rio Grande do Sul state. During the summer of 2018, the ichthyofauna of lower Estreito stream was sampled by beach hauls applied in 17 random points distributed in a stretch of ca. 2km. Measurements at the sampled stretch...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Jenynsia lineata; Mugil curema; Geophagus brasiliensis; Ichthyofauna dynamics; Salinity; Washout.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100501

Characterization of physical variables at La Escollera, a human-made coastal lagoon in Santa Marta, Colombian Caribbean
Provedor de dados: 50
ABSTRACT Coastal lagoons are a focus of primary production and a refuge for biodiversity due to their relative confinement and low depth. La Escollera is a human-made coastal lagoon in El Rodadero, Santa Marta (Colombian Caribbean), excavated in the early 1980s to hold a marina and its fringes planted with mangroves. To generate a baseline of physical variables that contribute to the nderstanding of water circulation and its influence on ecosystem attributes, salinity, temperature, sea level and light penetration data are outinely obtained through electronic recorders and handheld sensors. Salinity and temperature data from January 2017 to February 2018 ollowed the seasonal pattern of the open sea in the Santa Marta area, alternating between lower...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coastal lagoons; Marinas; Tides; Salinity; Temperatur.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000200025

Epipelagic euphausiids assemblage in the Gerlache Strait (Antarctic Peninsula) during January 2015
Provedor de dados: 50
Autores: Rivera-Gómez,Marisol; Giraldo,Alan; Mojica-Moncada,Diego F.
ABSTRACT The spatial distribution of the epipelagic Euphausiids was investigated during the first Colombian Scientific Expedition to Antarctica -Expedición Caldas- in the Gerlache Strait during the austral summer of 2015. Surface zooplankton was collected at 20 oceanographic stations with a simple conical net of 0.6 m in diameter mouth and 200 µm of mesh net. Four euphausiid species were collected in 70 % of the sampling stations: Euphausia crystallorophias Holt and Tattersall 1906, Euphausia superba Dana 1850, Thysanoessa sp. and Thysanoessa macrura Sars 1883. Euphausia crystallorophias was the most abundant species with maximum density of 818 ind 1000 m-3 associated with the entrance of the Wilhelmina Bay, in the central area of the Gerlache Strait. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euphausiacea; Temperature; Salinity; Antarctic Ocean; Austral summer.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000300129

EFECTO DE LA SALINIDAD EN LA SUPERVIVENCIA Y CRECIMIENTO DE CRÍAS DE CABALLITO DE MAR HIPPOCAMPUS REIDI GINSBURG EN CAUTIVERIO
Provedor de dados: 50
Autores: Melo-Valencia,Andrés Felipe; Ospina-Salazar,Gloria Helena; Gómez-León,Javier; Cortés-Pineda,Fabián Andrés.
This study was conducted to determine the optimal salinity for the culture of H. reidi fry during the first month of life, evaluating the effect of different salinities (27, 30, 33, and 36) on its growth and survival. The fry were distributed at three ind.L-1 density in 12 L incubators, animals were fed ad libitum throughout the experiment, survival was monitored daily, and height and weight were measured both at the beginning and end of the experiment. The salinity did not show significant differences between treatments, the highest survival rate was obtained at 27 with 17.59 ± 6.99%.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Salinity; Growth; Survival; Hippocampus reidi; Fry.
Ano: 2013
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612013000100013

Improvement of saline soils with Vicia sativa L. from a semiarid region
Provedor de dados: 53
Autores: Hernández,Marcos Afonso Lastiri; Alvarez-Bernal,Dioselina; Cárdenas,Gustavo Cruz; Estrada,Salvador Ochoa.
ABSTRACT In the Cienega de Chapala region of the state of Michoacan, Mexico, forage crops form a major pillar for traditional livestock systems. In this region, high soil salinity due to poor groundwater quality is a common problem. Thus, the objective of this research was to evaluate the potential of the forage species Vicia sativa L. for improved saline soil in a greenhouse and non-leaching conditions over the course of 90 days. In this experiment, three levels of NaCl salinity were tested: 5.3, 7.12 and 10.8 dS∙m–1. Samples of soil were analyzed for electrical conductivity of the saturation paste extract (ECe), soluble and interchangeable cations (Na+, K+, Ca2+ and Mg2+) content. Then, the forage species Vicia sativa L were divided into three categories...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cienega de Chapala; Glycophyte; Non-leaching; Phytodesalinization; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000300501

Phytodesalination of a moderately saline soil combined with two inorganic amendments
Provedor de dados: 53
Autores: Lastiri-Hernández,Marcos Alfonso; Alvarez-Bernal,Dioselina; Bermúdez-Torres,Kalina; Cárdenas,Gustavo Cruz; Ceja-Torres,Luis Fernando.
ABSTRACT The shortage of water and the increasing salinity are the main limiting environmental factors that directly affect the establishment and the development of crops. In this research, phytodesalination capacity of Sesuvium verrucosum was evaluated alone and in combination with agricultural gypsum (CaSO4·2H2O) and Polisul-C, in order to remedy a moderately saline soil at greenhouse level and under nonleaching conditions. The treatments studied were the following: T1 (soil), T2 (soil + S. verrucosum), T3 (soil +S. verrucosum + Polisul-C), T4 (soil + S. verrucosum + CaSO4·2H2O). Polyvinyl chloride (PVC) tubes filled with 8 kg of clay soil with an electrical conductivity of the saturation paste extract (ECe) of6.21 dS.m-1 were used. Soil samples were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gypsum; Halophyte; Nonleaching; Polisul-C; Salinity; Sesuvium verrucous.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400579

Salt stress alleviation by seed priming with silicon in lettuce seedlings: an approach based on enhancing antioxidant responses
Provedor de dados: 53
Autores: Alves,Rita de Cássia; Nicolau,Mayara Cristina Malvas; Checchio,Mirela Vantini; Sousa Junior,Gilmar da Silveira; Oliveira,Francisco de Assis de; Prado,Renato Melo; Gratão,Priscila Lupino.
ABSTRACT Seed germination and seedling growth are the stages most sensitive to salt stress, which can induce ion-specific effects and oxidative stress. Although silicon (Si) has been known to improve plant defense systems against stressful-conditions, little is known about seed priming with Si and mechanisms of Si-mediated alleviation of salt stress in seedlings. To further the modulation of salt-stress responses and their relation with Si, seed priming with calcium silicate (0, 0.05 and 0.1 mM Ca2SiO4) was used in lettuce seeds to improve seedgermination and tolerance on subsequent salt-stress exposure (0 and 50 mM NaCl). The effect of Si-priming was assessed on germination, germination rate index and mean germination time and survival of seedlings in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant enzymes; Lactuca sativa; Oxidative damages; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100019

Silicon nutrition counteracts salt-induced damage associated with changes in biochemical responses in apple
Provedor de dados: 53
Autores: Aras,Servet; Keles,Hakan; Eşitken,Ahmet.
ABSTRACT Salt stress is an environmental challenge that adversely influences plant responses. Silicon (Si) nutrition plays critical roles in plant tolerance to salt stress. Apple (Malus domestica Borkh.), a salt sensitive fruit species, was used in the present experiment to investigate the influences of Si on salt stress as well as on alterations of biochemical responses. Apple cv Fuji grafted on M9 clonal rootstock was exposed to salt stress for 4 months with 35 mmol·L-1 NaCl. CaSiO3 doses (0.5, 1 and 2 mmol·L-1) were applied to the roots of the salt-stressed apple plants except control. Si application resulted in mitigation of salt stress in apple plants. The highest chlorophyll a, b and a + b were obtained from the 1 mmol·L-1 Si treatment (5.37, 2.41...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malus domestica Borkh; Plant behavior; Rootstock; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100001

Development of mango wilt in mango cultivars submitted to salt stress
Provedor de dados: 53
Autores: Vieccelli,Juliana Cristina; Araujo,Leonardo; Lopes,Ueder Pedro; Siqueira,Dalmo Lopes de; Rodrigues,Fabrício de Ávila.
ABSTRACT Mango wilt, caused by Ceratocystis fimbriata, is one of the most important diseases affecting mango yield worldwide. Salt stress can affect host defense responses against pathogens infection. The aim of this study was to evaluate the development of mango wilt in 2 mango cultivars submitted to salt stress. Mango plants from cultivars Tommy Atkins and Ubá, considered to be moderately resistant and resistant to mango wilt, respectively, were grown in plastic pots which contained 20 kg of washed sand and daily irrigated with 3 L of a modified Hoagland solution during 40 days before being submitted to salinization. For this process of salinization, the plants received nutrient solution containing 0, 30, 60, and 90 mmol∙L–1 of sodium chloride (NaCl)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ceratocystis fimbriata; Mangifera indica; Resistance; Salinity; Vascular pathogen.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300372

Effects of temperature and salinity on the survival rates of coxicerberus ramosae (Albuquerque, 1978), an interstitial isopod of a Sandy Beach on the coast of Brazil
Provedor de dados: 52
Autores: Albuquerque,Elaine Figueiredo; Meurer,Bruno; Netto,Godofredo da Camara Genofre.
The tolerance to the combined effects of temperature and salinity was investigated in the interstitial isopod Coxicerberus ramosae (Albuquerque, 1978), a species of intertidal zone of sandy beaches in Rio de Janeiro, Brazil. The animals were collected on Praia Vermelha Beach. The experiments lasted 24 h and nine salinities and seven temperatures were used for a total of 63 combinations. Thirty animals were tested in each combination. The species showed high survival in most of the combinations. The temperature of 35 ºC was lethal and at 5 ºC, the animals tolerated only a narrow range of salinities. The statistical analyses showed that the effects of temperature and salinity were significant on the survival, which confirmed the euryhalinity and eurythermy...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Interstitial; Isopod; Resistance; Temperature; Salinity; Coxicerberus.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500015

The effect of temperature and salinity on the physiological rates of the mussel Perna perna (Linnaeus 1758)
Provedor de dados: 52
Autores: Resgalla Jr.,Charrid; Brasil,Elisângela de Souza; Salomão,Luis Carlos.
The aim of this work was to study the rates of respiration, clearance, excretion and absorption efficiency at different temperature and salinity under laboratory conditions for Perna perna. Results showed variations in physiological rates and in acclimatization capacity which, taken together, enabled to understand its behavior in the environment, as well as to estimate its scope for growth. All experiments were carried out in static conditions, in ten replicas with one mussel by flasks. Perna perna was capable of achieving acclimatization for both clearance and absorption efficiency (15 to 30 ºC), but it achieved only partial acclimatization for respiration and excretion under chronic temperature conditions. The clearance and respiration rates increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mussel; Perna perna; Physiological rates; Temperature; Salinity; Net growth efficiency.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300019

Survival and the growth of pintado (Pseudoplatystoma corruscans) post-larvae on different salinities
Provedor de dados: 52
Autores: Beux,Luis Fernando; Zaniboni Filho,Evoy.
The aim of this study was to evaluate the survival and growth of pintado, Pseudoplatystoma corruscans, post-larvae (PL) submitted to seven salinities: S1: 0; S2: 1.7; S3: 3.3; S4: 5; S5: 6.7; S6: 8.3 and S7: 10‰ distributed in a complete randomized design with three replicates. PL were stocked in 5-l round plastic containers at a density of 15 PL/liter and maintained in the dark. The water was salinized with iodine-free sodium chloride (NaCl). PL were fed six times a day with 500 Artemia sp. nauplii/PL. Survival was high up to salinity 1.7‰, both on the fifth and on the tenth day of experiment, but decreased quickly in salinities above 5‰. Better growth rates were observed in salinities 0 and 1.7‰, however, high growth observed in freshwater was due to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pseudoplatystoma corruscans; Salinity; Pintado; Artemia sp.; Post-larvae; Survival.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000500010

Functional cytology of the hepatopancreas of Palaemonetes argentinus (Crustacea, Decapoda, Caridea) under osmotic stress
Provedor de dados: 52
Autores: Díaz,Ana Cristina; Sousa,Liliana Graciela; Petriella,Ana María.
The present work describes the effect of different salinities on the functional morphology of the P. argentinus hepatopancreas and analyses the tissue recovery after re-acclimation to freshwater. Adult prawns of both sexes at sexual rest were collected from a tributary of the Mar Chiquita coastal lagoon. The prawns were acclimated in aquaria to four salinity conditions: 0 (control), 8, 16 and 24‰. To evaluate the possible tissular recovery, after 60 days individuals from all the treatments were gradually acclimated to freshwater and maintained for other 30 days. Hepatopancreas samples were processed at the beginning of the trial and every 30 days using standard histological techniques for OM and TEM. The individuals from all the treatments, except the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Histology; Hepatopancreas; P. argentinus.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300013

Effect of salt and osmotic stresses on the germination of pepper seeds of different maturation stages
Provedor de dados: 52
Autores: Demir,Ibrahim; Mavi,Kazım.
Germination percentage, seedling fresh weight and sensitivity index of the pepper (Capsicum annuum L. cv. Sera Demre) seed lots harvested 50, 60 and 70 days after the anthesis (daa) in 2001 and 2002 were determined under the salt (NaCl) and osmotic (PEG) stresses at the same water potentials of -0.3, -0.6 and -0.9 MPa. The objective was to study whether the germination and seedling growth were inhibited by the salt toxicity or osmotic effect during the development. The higher the salt and osmotic stress concentrations the lower was the germination percentage and seedling fresh weight. The seed germination was higher and sensitivity index were lower in NaCl than in PEG at the same water potential and harvest in both the years. They were able to germinate at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum; Salinity; Water stress; Germination.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500004

Sodium Chloride-Induced leaf senescence in Hydrocotyle bonariensis Lam. and Foeniculum vulgare L.
Provedor de dados: 52
Autores: Haddad,Claudia R. B.; Mazzafera,Paulo.
Leaf senescence induced by sodium chloride was studied in Hydrocotyle bonariensis Lam. and Foeniculum vulgare L. Both species belong to Umbelliferae family, however only H. bonariensis grows spontaneously in sandy soils of coastal regions (saline soils). Leaves of plants receiving nutrient solutions containing different concentrations of NaCl were evaluated for fresh and dry weights and chlorophyll content. The denaturating electrophoretic profiles of leaf proteins were also studied. Sodium chloride changed the protein profile of F. vulgare and hastened the leaf senescence of both the species. However, plants of H. bonariensis receiving 599 mM NaCl lasted longer than F. vulgare. Therefore, the occurrence of H. bonariensis in saline soils might be related...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorophyll; Protein; Salinity; Senescence.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000200005

Effect of salinity on the oxygen consumption of larvae of the silversides Odontesthes hatcheri and O. bonariensis (Osteichthyes, Atherinopsidae)
Provedor de dados: 52
Autores: Tsuzuki,Mônica Yumi; Strüssmann,Carlos Augusto; Takashima,Fumio.
Starved larvae of the silversides O. hatcheri (2- and 5-days-old) and Odontesthes bonariensis (5-days-old) were used to compare the oxygen consumption rates at 0, 5, 10, 20 and 30 ppt salinity. Oxygen consumption of O. hatcheri and O. bonariensis was minimal at 0 and 10 ppt, respectively, salinities close to those encountered in areas inhabited by these fishes. In both species, oxygen consumption rates thereafter increased with increasing salinity, and then abruptly decreased at 30 ppt. Lower consumption at extreme salinities might be a result of reduced activity, which in itself was salinity-modulated. Differences in activity may explain the fact that oxygen consumption rates of 5-day-old larvae were higher than 2-day-old larvae, which still possess...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Respiratory metabolism; Euryhaline fish; Silversides; Odontesthes hatcheri; Odonthesthes bonariensis.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300017

Water stress induced by mannitol and sodium chloride in soybean cultivars
Provedor de dados: 52
Autores: Machado Neto,Nelson Barbosa; Saturnino,Sérgio Marques; Bomfim,Daniel Carlini; Custódio,Ceci Castilho.
Four soybean (Glycine max L. Merril.) cultivars were contrasted in relation to germination and vigour of seedlings, when seeds were submitted to water stress induced by mannitol or sodium chloride. Water stress affected seed germination and seedling development, however, seedling development was affect in higher osmotic potential (-0.3MPa) than the necessary to affect germination -1.2MPa when induced by mannitol or -0.6MPa when induced by sodium chloride. 'Pioneira' and 'Xingu' cultivars had high development in low water availability and/or salinity conditions.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Tolerance; Salinity; Germination; Vigour.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400004

Acute and chronic effects of cadmium on blood homeostasis of an estuarine crab, Chasmagnathus granulata, and the modifying effect of salinity
Provedor de dados: 56
Autores: Rodríguez,E.M.; Bigi,R.; Medesani,D.A.; Stella,V.S.; Greco,L.S.L.; Moreno,P.A.R.; Monserrat,J.M.; Pellerano,G.N.; Ansaldo,M.
Whole body oxygen consumption and some hemolymph parameters such as pH, partial pressure of gases, level of ions and lactate were measured in the estuarine crab Chasmagnathus granulata after both acute (96 h) and chronic (2 weeks) exposure to cadmium at concentrations ranging from 0.4 to 6.3 mg/l. In all instances, the crabs developed hemolymph acidosis, but no respiratory (increased PCO2) or lactate increases were evident. Hemolymph levels of sodium and calcium were always increased by cadmium exposure. The chronic toxicity of cadmium was enhanced at 12‰ salinity, even causing a significantly higher mortality in comparison with the higher salinity (30‰) used. A general metabolic arrest took place at 12‰ salinity in the crabs chronically exposed to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cadmium; Crabs; Blood homeostasis; Salinity.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000400011

Bacterial exopolysaccharide and biofilm formation stimulate chickpea growth and soil aggregation under salt stress
Provedor de dados: 58
Autores: Qurashi,Aisha Waheed; Sabri,Anjum Nasim.
To compensate for stress imposed by salinity, biofilm formation and exopolysaccharide production are significant strategies of salt tolerant bacteria to assist metabolism. We hypothesized that two previously isolated salt-tolerant strains Halomonas variabilis (HT1) and Planococcus rifietoensis (RT4) have an ability to improve plant growth, These strains can form biofilm and accumulate exopolysacharides at increasing salt stress. These results showed that bacteria might be involved in developing microbial communities under salt stress and helpful in colonizing of bacterial strains to plant roots and soil particles. Eventually, it can add to the plant growth and soil structure. We investigated the comparative effect of exopolysacharide and biofilm formation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofilm; Cicer arietinum; Exopolysaccharide; Salinity; Soil aggregates.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300046

Decolorization of azo dyes (Direct Blue 151 and Direct Red 31) by moderately alkaliphilic bacterial consortium
Provedor de dados: 58
Autores: Lalnunhlimi,Sylvine; Krishnaswamy,Veenagayathri.
Abstract Removal of synthetic dyes is one of the main challenges before releasing the wastes discharged by textile industries. Biodegradation of azo dyes by alkaliphilic bacterial consortium is one of the environmental-friendly methods used for the removal of dyes from textile effluents. Hence, this study presents isolation of a bacterial consortium from soil samples of saline environment and its use for the decolorization of azo dyes, Direct Blue 151 (DB 151) and Direct Red 31 (DR 31). The decolorization of azo dyes was studied at various concentrations (100–300 mg/L). The bacterial consortium, when subjected to an application of 200 mg/L of the dyes, decolorized DB 151 and DR 31 by 97.57% and 95.25% respectively, within 5 days. The growth of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alkaliphilic bacterial consortium; Azo dye; Direct Blue 151; Direct Red 31; Decolorization; Salinity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000100039

Comparative study of wild and transformed salt tolerant bacterial strains on Triticum aestivum growth under salt stress
Provedor de dados: 58
Autores: Afrasayab,Shazia; Faisal,Muhammad; Hasnain,Shahida.
Eleven salt tolerant bacteria isolated from different sources (soil, plants) and their transformed strains were used to study their influence on Triticum aestivum var. Inqlab-91 growth under salt (100 mM NaCl) stress. Salt stress caused reduction in germination (19.4%), seedling growth (46%) and fresh weight (39%) in non-inoculated plants. In general, both wild and transformed strains stimulated germination, seedling growth and fresh weight in salt free and salt stressed conditions. At 100 mM NaCl, Staphylococcus xylosus ST-1 caused 25% increments in seedling length over respective control. Soluble protein content significantly enhanced (49%) under salt stress as compared to salt free control. At 100 mM NaCl parental strain PT-5 resulted about 32%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Plasmid; Rhizobacteria; Salinity; Auxin; Transformation.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400013

Phenotype-driven strategies for screening Candida parapsilosis complex for molecular identification
Provedor de dados: 58
Autores: Cordeiro,Rossana A.; Sales,Jamille A.; Ponte,Yago B. de; Mendes,Patrícia B.L.; Serpa,Rosana; Evangelista,Antônio J.; Alencar,Lucas P. de; Pereira-Neto,Waldemiro de A.; Brilhante,Raimunda S.N.; Sidrim,José J.C.; Castelo-Branco,Débora S.C.M.; Rocha,Marcos F.G.
Abstract In this study, phenotypic methods presented &gt;80% agreement with the molecular identification of 59 Candida parapsilosis complex. Growth at 15% NaCl or pH 7.0 significantly reduced cfu-counts of Candida orthopsilosis, suggesting these conditions may support the development of phenotypic methods for the differentiation of the cryptic species of C. parapsilosis complex.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Candida parapsilosis; Salinity; PH conditions.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000500193

Bacteria in combination with fertilizers promote root and shoot growth of maize in saline-sodic soil
Provedor de dados: 58
Autores: Zafar-ul-Hye,Muhammad; Farooq,Hafiz Muhammad; Hussain,Mubshar.
Salinity is the leading abiotic stress hampering maize (Zea maysL.) growth throughout the world, especially in Pakistan. During salinity stress, the endogenous ethylene level in plants increases, which retards proper root growth and consequent shoot growth of the plants. However, certain bacteria contain the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, which converts 1-aminocyclopropane-1-carboxylic acid (an immediate precursor of ethylene biosynthesis in higher plants) into ammonia and α-ketobutyrate instead of ethylene. In the present study, two Pseudomonas bacterial strains containing ACC-deaminase were tested separately and in combinations with mineral fertilizers to determine their potential to minimize/undo the effects of salinity on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; ACC-deaminase; Rhizobacteria; Salinity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100097

Comparative study of the pathogenicity of seabed isolates of Fusarium equiseti and the effect of the composition of the mineral salt medium and temperature on mycelial growth
Provedor de dados: 58
Autores: Palmero,D; Cara,M. de; Iglesias,C; Gálvez,L; Tello,J.C.
The pathogenicity of seven strains of Fusarium equiseti isolated from seabed soil was evaluated on different host plants showing pre and post emergence damage. Radial growth of 27 strains was measured on culture media previously adjusted to different osmotic potentials with either KCl or NaCl (-1.50 to - 144.54 bars) at 15º, 25º and 35º C. Significant differences and interactive effects were observed in the response of mycelia to osmotic potential and temperature.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Sodium chloride; Potassium chloride; Osmotic pressure; Temperature.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300013

Changes induced by co-inoculation in nitrogen–carbon metabolism in cowpea under salinity stress
Provedor de dados: 58
Autores: Santos,Alexandra de Andrade; Silveira,Joaquim Albenísio Gomes da; Guilherme,Eliezer de Araujo; Bonifacio,Aurenivia; Rodrigues,Artenisa Cerqueira; Figueiredo,Márcia do Vale Barreto.
ABSTRACT To mitigate the deleterious effects of abiotic stress, the use of plant growth-promoting bacteria along with diazotrophic bacteria has been increasing. The objectives of this study were to investigate the key enzymes related to nitrogen and carbon metabolism in the biological nitrogen fixation process and to elucidate the activities of these enzymes by the synergistic interaction between Bradyrhizobium and plant growth-promoting bacteria in the absence and presence of salt stress. Cowpea plants were cultivated under axenic conditions, inoculated with Bradyrhizobium and co-inoculated with Bradyrhizobium sp. and Actinomadura sp., Bradyrhizobium sp. and Bacillus sp., Bradyrhizobium sp. and Paenibacillus graminis, and Bradyrhizobium sp. and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: BNF; Plant growth-promoting bacteria; Glutamine synthetase; Acid invertase; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400685

Antioxidant response of cowpea co-inoculated with plant growth-promoting bacteria under salt stress
Provedor de dados: 58
Autores: Santos,Alexandra de Andrade; Silveira,Joaquim Albenísio Gomes da; Bonifacio,Aurenivia; Rodrigues,Artenisa Cerqueira; Figueiredo,Márcia do Vale Barreto.
Abstract Soil salinity is an important abiotic stress worldwide, and salt-induced oxidative stress can have detrimental effects on the biological nitrogen fixation. We hypothesized that co-inoculation of cowpea plants with Bradyrhizobium and plant growth-promoting bacteria would minimize the deleterious effects of salt stress via the induction of enzymatic and non-enzymatic antioxidative protection. To test our hypothesis, cowpea seeds were inoculated with Bradyrhizobium or co-inoculated with Bradyrhizobium and plant growth-promoting bacteria and then submitted to salt stress. Afterward, the cowpea nodules were collected, and the levels of hydrogen peroxide; lipid peroxidation; total, reduced and oxidized forms of ascorbate and glutathione; and superoxide...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant-bacteria interactions; Reactive oxygen species; Salinity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300513

NaCl salinity affects germination, growth, physiology, and biochemistry of bambara groundnut
Provedor de dados: 61
Autores: Ambede,Jane Gayalwa; Netondo,Godffrey Wafula; Mwai,Gideon Njau; Musyimi,David Mutisya.
The effects of NaCl salinity on seed germination, growth, physiology, and biochemistry of two bambara groundnut landraces (Vigna subterranea (L.) Verdc), Kakamega (white seed coat) and Mumias (red seed coat), were investigated with the aim of establishing traits, which can provide a basis for breeding to salt tolerance in groundnuts. A study was conducted under laboratorial and greenhouse conditions. Bambara groundnut seeds and plants were subjected to five concentrations of NaCl solutions with several electrical conductivities: 0 (control), 6.96, 12.93, 19.89, and 25.86 dS m-1. Germination percentage, growth, chlorophyll fluorescence, and leaf chlorophyll content were determined. Sodium chloride salinity (p&lt;0.05) significantly decreased germination and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Vigna subterranea; Growth physiology; Saline water.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000300002

The effects of salt stress on growth, nitrate reduction and proline and glycinebetaine accumulation in Prosopis alba
Provedor de dados: 61
Autores: Meloni,Diego Ariel; Gulotta,Marta Rosalía; Martínez,Carlos Alberto; Oliva,Marco Antonio.
Prosopis alba (algarrobo) is one of the most important salt-tolerant legumes used in the food and furniture industries. The effects of salinity on some growth and physiological parameters in algarrrobo seedlings were investigated. 17-Day-old seedlings were subjected to three salt treatments by adding NaCl to the growth medium in 50 mmol.L-1 increments every 24 h until the final concentrations of 0, 300 and 600 mmol.L-1 were reached. Only the highest NaCl concentration affected all of the considered parameters. Thus, 600 mmol.L-1 NaCl caused a significant reduction in root and shoot growth, but an increase in the root/shoot ratio. Leaf relative water content, nitrate content and nitrate reductase activity in leaves and roots were also decreased. At 300 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycinebetaine; Nitrate reductase; Proline; Salinity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100006

Morpho-physiological responses of cowpea leaves to salt stress
Provedor de dados: 61
Autores: Lacerda,Claudivan F.; Assis Júnior,José O.; Lemos Filho,Luiz C. A.; Oliveira,Teógenes S. de; Guimarães,Francisco V.A.; Gomes-Filho,Enéas; Prisco,José T.; Bezerra,Marlos A.
The effect of salt stress of known intensity and duration on morpho-physiological changes in leaves of different ages from cowpea [Vigna unguiculata (L.) Walp.] plants was studied, aiming for a better understanding of the acclimation process of the whole-plant. Seeds were sown in vermiculite and seedlings were transferred to plastic trays containing aerated nutrient solution, and kept in a greenhouse. When the first trifoliate leaf emerged the seedlings were transplanted into 3 L plastic pots containing aerated nutrient solution. Salt additions started 5 d later, and the salt-treated plants received 25 mmol L-1 per day until reaching a final concentration of 75 mmol L-1. During the experimental period primary leaves and the 1st, 2nd, and 3rd trifoliate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ion concentration; Photosynthate partitioning; Photosynthesis; Salinity; Stress acclimation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000400003

Effects of salt stress on plant growth, stomatal response and solute accumulation of different maize genotypes
Provedor de dados: 61
Autores: Azevedo Neto,André Dias de; Prisco,José Tarquinio; Enéas-Filho,Joaquim; Lacerda,Claudivan Feitosa de; Silva,José Vieira; Costa,Paulo Henrique Alves da; Gomes-Filho,Enéas.
Seeds from eight different maize genotypes (BR3123, BR5004, BR5011, BR5026, BR5033, CMS50, D766 and ICI8447) were sown in vermiculite, and after germination they were transplanted into nutrient solution or nutrient solution containing 100 mmol.L-1 of NaCl and placed in a greenhouse. During the experimental period plant growth (dry matter, shoot to root dry mass ratio, leaf area, relative growth rate, and net assimilation rate), leaf temperature, stomatal conductance, transpiration, predawn water potential, sodium, potassium, soluble amino acids and soluble carbohydrate contents were determined in both control and salt stressed plants of all genotypes studied. Salt stress reduced plant growth of all genotypes but the genotypes BR5033 and BR5011 were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth analysis; Osmoregulation; Salinity; Transpiration; Zea mays; Water relations.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100005

Ecophysiological responses to drought and salinity in the cosmopolitan invader Nicotiana glauca
Provedor de dados: 61
Autores: González,Armando; Tezara,Wilmer; Rengifo,Elizabeth; Herrera,Ana.
Nicotiana glauca, a shrub native to southern South America, is widely distributed in the Americas, from Patagonia to the USA, from zero up to 3,700 m; it rapidly invades disturbed environments. In Venezuela, it has been reported from zero up to 2,000 m growing in contrasting conditions of relative humidity, temperature, rainfall, and salinity. In order to gain insight into the extent and mode of resistance to drought and salinity in N. glauca, we studied the effect of these factors on water relations and photosynthesis under both natural and greenhouse conditions. In the field, water potential, photosynthetic rate (A) and stomatal conductance (gs), but not relative water content (RWC) decreased because of drought. Manual removal of epicuticular wax...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drought; Osmotic adjustment; Salinity; Water deficit.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000300008

Photosynthesis and antioxidant activity in Jatropha curcas L. under salt stress
Provedor de dados: 61
Autores: Campos,Mariana Lins de Oliveira; Hsie,Bety Shiue de; Granja,João Antônio de Almeida; Correia,Rafaela Moura; Almeida-Cortez,Jarcilene Silva de; Pompelli,Marcelo Francisco.
Biodiesel is an alternative to petroleum diesel fuel. It is a renewable, biodegradable, and nontoxic biofuel. Interest in the production of biodiesel from Jatropha curcas L. seeds has increased in recent years, but the ability of J. curcas to grow in salt-prone areas, such as the Caatinga semiarid region, has received considerably meager attention. The aim of this study was to identify the main physiological processes that can elucidate the pattern of responses of J. curcas irrigated with saline water, which commonly occurs in the semiarid Caatinga region. This study measured the activity of the antioxidant enzymes involved in the scavenging of reactive oxygen species, which include catalase (CAT) and ascorbate peroxidase (APX), as well as malondialdehyde...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiesel; CAT and APX activities; Euphorbiaceae; H2O2 and MDA contents; Salinity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000100008

Inhibition of the water splitting system by sodium chloride stress in the green alga Chlorella vulgari
Provedor de dados: 61
Autores: EL-Sheekh,Mostafa M.
The effect of sodium chloride on the photosynthetic electron transport chain was investigated in the freshwater green alga Chlorella vulgaris. It was found that the rate of oxygen evolution under steady state and flash light conditions diminished by increasing salt concentrations. Salt treatment of cells also decreased the fluorescence and delayed luminescence yields. However, the fluorescence yield was almost completely restored by the addition of an artificial electron donor to the NaCl-treated cells. The oscillation pattern of the thermoluminescence B band as a function of flash number indicated that the S2&lt;FONT FACE=Symbol&gt;®&lt;/FONT&gt;S3 transition of the water splitting system is inhibited by NaCl treatment.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorella; Electron transport; Photosystem II; Salinity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100004

Glomus intraradices improved salt tolerance in Prosopis alba seedlings by improving water use efficiency and shoot water content
Provedor de dados: 61
Autores: Scambato,Agustina A.; Echeverria,Mariela; Sansberro,Pedro; Ruiz,Oscar A.; Menéndez,Ana Bernardina.
The present work was aimed at testing the hypothesis that mycorrhizal Prosopis alba, an economically important tree species worldwide, presents increased salt-tolerance compared with non-mycorrhizal ones and at gaining insight into the possible mechanisms underlying that improvement. For this purpose, a randomized complete block experiment with two factors: mycorrhizal treatments with or without the arbuscular fungus Glomus intraradices and two salinity levels, 0 and 200 mM NaCl was performed. Plant growth in P. alba plants colonized by G. intraradices was less affected by salinity than that in non-arbuscular mycorrhizal (AM) plants, indicating that mycorrhizal colonization turned P. alba more tolerant to salinity. Photosynthesis was reduced by salinity in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Photosynthesis; Salinity; Stomatal conductance; Transpiration ratio; Proline.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000400008

Osmotic adjustment in roots and leaves of two sorghum genotypes under NaCl stress
Provedor de dados: 61
Autores: Lacerda,Claudivan Feitosa de; Cambraia,José; Oliva,Marco Antonio; Ruiz,Hugo Alberto.
Seedlings of two sorghum genotypes [Sorghum bicolor (L.) Moench], one salt tolerant (CSF 20) and the other salt sensitive (CSF 18) were grown in nutrient solution containing 0, 50 and 100 mmol.L-1 NaCl for seven days and the osmotic potential (Ys) and the contribution of organic and inorganic solutes to the Ys were determined in the leaves and roots. Salinity reduced the Ys of the cellular sap of leaves and roots in both genotypes, mainly in the salt sensitive one. The higher decrease in the Ys in the salt sensitive genotype was mostly due to higher accumulation of Na+ and Cl- that probably exceeded the amount needed for the osmotic adjustment. Among the inorganic solutes, K+ contributed the most to the Ys in control unstressed seedlings, but its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ions; Organic solutes; Osmotic adjustment; Salinity; Sorghum bicolor.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200007

Antioxidant-enzymatic system of two sorghum genotypes differing in salt tolerance
Provedor de dados: 61
Autores: Costa,Paulo Henrique Alves da; Neto,André Dias de Azevedo; Bezerra,Marlos Alves; Prisco,José Tarquinio; Gomes-Filho,Enéas.
Two forage sorghum genotypes were studied: CSF18 (salt-sensitive) and CSF20 (salt-tolerant). Shoot growth reduction as a result of salt stress was stronger in the salt sensitive genotype compared to the salt tolerant one. When the two genotypes were subjected to salt stress (75 mM NaCl) no significant change in lipid peroxidation was observed. However, salt stress induced increases in superoxide dismutase and catalase activities in both genotypes. These salt-induced increases were higher in the salt-tolerant genotype. Peroxidase activity was differentially affected by salt stress in the two genotypes. The activities of these peroxidases were decreased by salt stress in the salt-sensitive genotype and increased in the salt-tolerant genotype. In addition,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum bicolor; Antioxidant-enzymatic system; Lipid peroxidation; Oxidative stress; Salinity.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000400003

Antioxidant and other biochemical defense responses of Macrotyloma uniflorum (Lam.) Verdc. (Horse gram) induced by high temperature and salt stress
Provedor de dados: 61
Autores: Naji,Khalid Mohammed; Devaraj,V. R.
High temperature and salinity are the major ecological factors challenging crop productivity in the arid and semiarid regions of the world. Effects of high temperature (43-45°C) and salt stress (0.6 M) on Macrotyloma uniflorum (Lam.) Verdc. (Horse gram), were evaluated in terms of antioxidants and antioxidant enzymes. Both treatments caused typical stress responses in this tropical leguminosae. Oxidative stress indicators such as H2O2, TBARS, and proline were significantly elevated. Similarly, the antioxidant enzymes superoxide dismutase (SOD; EC 1.15.1.1), guaiacol peroxidase (POX; EC 1.11.1.7) and acid phosphates (AP; EC 3.1.3.2) were significantly elevated while catalase (CAT; EC 1.11.1.6) was reduced. These treatments had contrasting effects on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant enzymes; Horse gram; Isozymes; Oxidative stress; Salinity; Stress markers.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000300002

Supplemental Ca2+ does not improve growth but it affects nutrient uptake in NaCl-stressed cowpea plants
Provedor de dados: 61
Autores: Guimarães,Francisco Valderez Augusto; Lacerda,Claudivan Feitosa de; Marques,Elton Camelo; Abreu,Carlos Eduardo Braga de; Aquino,Boanerges Freire de; Prisco,José Tarquinio; Gomes-Filho,Enéas.
The growth and nutrient assimilation was evaluated in CaCl2- and CaSO4-supplemented cowpea plants subjected to salt stress (75 mM NaCl). The salinity significantly reduced the cowpea vegetative growth. The addition of CaCl2 in the growth medium did not significantly affect plant growth, while for the CaSO4, the beneficial effects of Ca2+ were moderate. Salinity increased the Na+, K+, Cl-, N and P content in the plants, however it decreased the content of Ca2+ and Mg2+. Increases in Ca2+ concentration in the nutrient solution caused decreases in the Na+ and Mg2+ contents and increases in Ca2+, K+, P, and Cl- contents. The supplemental Ca2+ may alleviate the Na+ toxicity and may improve nutritional and ionic balance in cowpea, but it cannot overcome the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Mineral nutrition; Salinity; Vigna unguiculata.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000100003

Importance of Ionic and Osmotic Components of Salt Stress on the Germination of Four Quinua (Chenopodium quinoa Willd.) Selections
Provedor de dados: 117
Autores: Delatorre-Herrera,José; Pinto,Manuel.
The influence of the components of saline stress (osmotic and ionic factors) were evaluated during the germination of four quinua (Chenopodium quinoa Willd.) selections in Chile, two collected in the arid northern highland region with saline soils (Amarilla and Roja) and the other two from the rainy southern region with non-saline soils (Hueque and Pucura). The seeds were treated with different saline concentrations (0, 0.2, 0.4, 0.8 and 1.2 M NaCl). Germination kinetics shows that the control treatments of the four selections reach 100% germination. With application of 0.4 M NaCl (LD50max) germination was reduced by 53% in the Amarilla selection and 89.9% in Hueque. The germination rate was lower for the seeds from non-saline areas, which reached...
Tipo: Journal article
Palavras-chave: Salinity; Imbibition; Seeds; NaCl; Altiplano; Desert.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000400001

The impacts of biofertilizer and mineral fertilization on the growth and production of yellow passion fruit irrigated with moderately saline water
Provedor de dados: 118
Autores: Nascimento,José A. M. do; Cavalcante,Lourival F; Cavalcante,Ítalo H. L; Pereira,Walter E; Dantas,Stênio A. G; Medeiros,Sherly A. da S.
Yellow passion fruit, because it is sensitive to the salinity of irrigation water or soil, requires restrictive water management strategies and inputs that mitigate the effects of salts on plants irrigated with harmful saline water levels. As such, an experiment was designed to evaluate the effects of bovine biofertilizer and mineral fertilization with NPK on the growth and production of yellow passion fruit plants irrigated with moderately saline water. Treatments were arranged in a randomized block with three replications and 12 plants per plot using a 4×2 factorial design with four doses of bovine biofertilizer diluted in water at 0, 33.3, 66.6 and 100% proportions in soil with and without NPK. The evaluated variables included the stem diameter, number...
Tipo: Journal article
Palavras-chave: Organic input; Salinity; Passiflora edulis Sims.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200008

Saline-boron stress in northern Chile olive accessions: water relations, B and Cl contents and impact on plant growth
Provedor de dados: 118
Autores: Escobar,Hugo; Lara,Nelson; Zapata,Yubinza; Urbina,Camilo; Rodriguez,Manuel; Figueroa,Leonardo.
H. Escobar, N. Lara, Y. Zapata, C. Urbina, M. Rodriguez, and L. Figueroa. 2013. Saline-boron stress in northern Chile olive accessions: water relations, B and Cl contents and impact on plant growth. Cien. Inv. Agr. 40(3): 597-607. The objective of this study was to analyze the effect of saline-boron stress on the vegetative growth, dry leaf weight, water potential (&amp;#936;w), relative water content, and leaf and root B and Cl- contents in 8 accessions of olive. Rooted one-year-old plants were cultivated for 132 days with 50% shading in 5-L pots containing sand substrate and watered with Jensen's nutrient solution. After eight days of uniform ferti-irrigation, the plants were exposed to saline-boron stress, which was administered in three successive...
Tipo: Journal article
Palavras-chave: Boron; Chloride; Olive; Salinity; Water relations.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300012

Gas exchange and productivity of yellow passion fruit irrigated with saline water and fertilized with potassium and biofertilizer
Provedor de dados: 118
Autores: Nunes,Járisson C.; Cavalcante,Lourival F.; Pereira,Walter E.; Souza,José T. A.; Almeida,Dácio J. de; Oresca,Denizard; Fernandes,Pedro D.
Abstract The salinity of irrigation water can affect the growth and development of most plants of commercial interest. Aiming to study these aspects in passion fruit culture, an experiment was performed to evaluate the effects of bovine biofertilizer and potassium fertilization on gas exchange and production of the passion fruit &amp;#8216;BRS Giant Yellow&amp;#8217; irrigated with non-saline and saline water. The treatments were arranged in randomized blocks with sub-subdivided plots using the 2×(3×5) scheme, which refers to two levels of electrical conductivity of the irrigation water as the main plot (0.35 and 4.00 dS m&amp;#8722;1) and the combination of three potassic fertilization practices (without fertilization, fertilized with conventional and...
Tipo: Journal article
Palavras-chave: Fermented liquid manure; Passiflora edulis Sims; Photosynthetic efficiency; Salinity.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000200168

Interactive effects of excess boron and salinity on histological and ultrastructural leaves of Zea mays amylacea from the Lluta Valley (Arica-Chile)
Provedor de dados: 118
Autores: Bastías,Elizabeth; González-Moro,María B; González-Murua,Carmen.
E.I. Bastías, M.B. González-Moro, and C. González-Murua. 2013. Interactive effects of excess boron and salinity on histological and ultrastructural leaves of Zea mays amylacea from the Lluta Valley (Arica-Chile). Cien. Inv. Agr. 40(3): 581-595. Maize is widely cultivated throughout the world, and more maize is produced each year than any other grain. Studies on the response of maize to salinity have typically focused on physiological aspects, but few studies have addressed the effects of salinity on the anatomical and ultrastructural characteristics of different plant organs. We analyzed the cell structure and changes in tissue organization in young leaves of Zea mays L. amylacea as a consequence of high salt and boron (B) levels. Plants were treated in...
Tipo: Journal article
Palavras-chave: Amylacea; Amylacea maize; Anatomical plant; Boron; Histological; Salinity.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300011

Salt stress and exogenous silicon influence physiological and anatomical features of in vitro-grown cape gooseberry
Provedor de dados: 65
Autores: Rezende,Renata Alves Lara Silva; Rodrigues,Filipe Almendagna; Soares,Joyce Dória Rodrigues; Silveira,Helbert Rezende de Oliveira; Pasqual,Moacir; Dias,Gabrielen de Maria Gomes.
ABSTRACT: Salt stress is one of several major abiotic stresses that affect plant growth and development, and there are many evidences that silicon can ameliorate the injuries caused by high salinity. This study presents the results of an assay concerning: (1) the effect of in vitro NaCl-induced salt stress in cape gooseberry plants and (2) the possible mitigating effect of silicon in saline conditions. For that, nodal segments were inoculated in Murashige and Skoog (MS) medium under salinity (0.5 and 1.0% NaCl) with different silicic acid concentrations (0, 0.5 and 1.0g L-1). Phytotechnical characteristics, photosynthetic pigments content, and leaf anatomy were evaluated after 30 days. Shoot length, root length, number of leaves and buds, fresh and dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physalis peruviana L.; Abiotic stress; Salinity; Pigments; Anatomy.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000100401

Physiological response of marandu grass seeds exposed to NPK fertilizer
Provedor de dados: 65
Autores: Codognoto,Luciane da Cunha; Conde,Thassiane Telles; Maltoni,Kátia Luciene; Faria,Glaucia Amorim; Reis,André Rodrigues dos.
ABSTRACT:  To facilitate seeding process of forage species, a common practice is to mix seeds with fertilizers in monocropping and intercropping or in implementing integrated livestock production systems. However, in prolonged periods of contact, the fertilizer’s salinity and acidity negatively affect the seeds’ physiological quality. Therefore, this study intends to verify the effect of ten periods (0, 3, 6, 12, 24, 36, 48, 72, 96, and 120 hours) of exposure to granular NPK fertilizer 04-30-16 on the vigor and germination of Urochloa brizantha cv. Marandu seeds. The experiment was conducted in a completely randomized design with three replication. The fertilizer and seed mixture registered a negative effect on seed moisture content, electrical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria; Ionic effect; Germination; Osmotic effect; Salinity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600250

Potassium chloride: impacts on soil microbial activity and nitrogen mineralization
Provedor de dados: 65
Autores: Pereira,David Gabriel Campos; Santana,Isadora Alves; Megda,Marcio Mahmoud; Megda,Michele Xavier Vieira.
ABSTRACT:  Potassium chloride is the most widely used potassium source worldwide, and due to its continuous use, the accumulation of its salts in the soil and in plants is becoming more common. Excess available ions can cause a series of physiological disturbances in organisms and can become a biocide in the soil. The objective of this study was to evaluate the effects of the application of KCl and banana crop residues on soil chloride content, microbial activity, and soil ammonification. The experiment utilized a completely randomized 2 × 4 factorial design with four replicates. Treatments were as follows: two doses of vegetal residue (200 and 400 mg dm-3) × four doses of KCl (0, 167, 334, and 668 mg dm-3 of KCl) and a control (untreated soil). The CO2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Respirometry; Salinity; Bananeira residues; Ammonification.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000500250

Seed priming improves the germination and growth rate of melon seedlings under saline stress
Provedor de dados: 65
Autores: Oliveira,Carlos Eduardo da Silva; Steiner,Fábio; Zuffo,Alan Mario; Zoz,Tiago; Alves,Charline Zaratin; Aguiar,Viviane Cabrera Baptista de.
ABSTRACT:  The germination and growth of melon (Cucumis melo L.) plants can be severely affected by excess salts in the soil or irrigation water; however, negative effects of salt stress can be attenuated using appropriate methods of seed priming. Thus, effects of osmopriming as inducer of salt stress tolerance in melon seeds exposed to salinity levels were investigated in this study. Seeds were soaked for 22 h at 25 °C in the dark in distilled water (hydropriming) or 0.5% KNO3 solution (osmopriming), and after drying, were distributed in plastic boxes with blotter paper containing different NaCl solutions prepared with osmotic pressure of 0.0 MPa (control), -0.3 MPa (mild stress), and -0.6 MPa (severe stress). Unprimed dry seeds were taken as control. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo L.; Salinity; Hydropriming; Osmopriming; Salt tolerance.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000700200

Mycorrhization and saline stress response in Hyptis suaveolens
Provedor de dados: 65
Autores: Souza,Marília Cristina Gomes de; Morais,Marciana Bizerra de; Andrade,Marcelo da Silva; Vasconcelos,Mayron Alves de; Sampaio,Silvana Saker; Albuquerque,Cynthia Cavalcanti de.
ABSTRACT: The objective of this study was to evaluate the physiological and biochemical mechanisms of adaptation of Hyptis suaveolens under osmotic stress due to salinity inoculations with a mycorrhizal fungal species. H. suaveolens seeds were germinated in polyethylene pots containing a substrate associated with or without arbuscular mycorrhizal fungi (AMF). After plant formation, treatments were treated with different salt concentrations (0.0, 35, 70, and 105 mM) and fungi (control and two types of AMF), totaling 12 treatments with three replicates. The experimental design used randomized blocks in a 4 x 3 factorial scheme, totaling 12 treatments with three replicates each. Salinity affected all measured physiological and biochemical variables, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Abiotic stress; Salinity; Arbuscular mycorrhizal fungi.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000600402

Production of parsley in hydroponic conditions under isosmotic brackish nutrient solutions
Provedor de dados: 64
Autores: Martins,Juliana Bezerra; Santos Júnior,José Amilton; Silva Júnior,Fernando José da; Silva,Gerônimo Ferreira da; Medeiros,Salomão de Sousa.
ABSTRACT Brackish waters may vary in their chemical compositions, interfering with different plant responses to stress; therefore, the present study aimed to evaluate the production components of parsley plants subjected to levels of electrical conductivity in nutrient solutions with an initial ECns of 1.58 dS m-1, which was solubilized in water with the following water electrical conductivity configurations (ECw): 0.12 (control), 1.12, 2.12, 3.12, 4.12 and 5.12 dS m-1, resulting in six isosmotic levels (ECns = 1.7, 2.7, 3.7, 4.7, 5.7 and 6.7 dS m-1) in an interaction with four types of salt: NaCl, CaCl2, MgCl2 and KCl. The experimental design was completely randomized in a factorial scheme with five replicates. Two strategies were used to restore the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Petroselinum crispum; Salinity; Cationic nature; Hydroponics.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100200

Nutrient and inorganic solute (Na+ and Cl-) content in green onion plants under hydroponic cultivation using brackish water
Provedor de dados: 64
Autores: Souza,Carlos Donato da Silva; Silva,Geronimo Ferreira da; Menezes,Sirleide Maria de; Morais,José Edson Florentino de; Santos Júnior,José Amilton; Silva,Alexsandro Oliveira da.
ABSTRACT Cultivation using brackish waters can result in nutritional and metabolic imbalances in several plant species, consequently reducing the production of dry matter (DM) and accumulation of toxic ions (Na+ and/or Cl-) in plants. We evaluated the DM production, and nutrient and inorganic solute (Na+ and Cl-) content in green onion plants (cv. Todo Ano Evergreen - Nebuka) under different levels of nutrient solution salinity in combination with circulation frequencies of this solution. Two experiments were conducted in a hydroponic system, using a completely randomized design, in a 6 × 2 factorial scheme, with five replicates: six levels of nutrient solution salinity (1.5, 3.0, 4.5, 6.0, 7.5, and 9.0 dS m-1) and two solution circulation frequencies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium fistulosum L.; Nutrient solution; Salinity; Mineral nutrition.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100227

Transcriptional responses of Rosa rugosa to salt stress and salt shock
Provedor de dados: 64
Autores: Reis,Michele Valquíria dos; Rouhana,Laura Vaughn; Paiva,Patrícia Duarte de Oliveira; Silva,Diogo Pedrosa Correia da; Paiva,Renato; Korban,Schuyler.
ABSTRACT Rugosa rugosa has high tolerance to various stresses; however, the molecular mechanisms of this behavior under adverse conditions are unclear. The objective of this study is to investigate expression patterns of stress-related genes in response to salinity stress. Changes in transcript levels of R. rugose, grown under different salt stress conditions (0, 25, 50, and 100 mM NaCl) over a long exposure period (30 days), have been investigated. In addition, the effects of salt shock stress on seedlings exposed to a high level (200 mM) of NaCl for a relatively short duration (3 h) have also been investigated. Expression levels of selected differentially expressed genes have been determined using relative reverse transcription polymerase chain reaction...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rosaceae; Salinity; Salt tolerance; Ion homeostasis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100241