Consulta: subjectFacets:"Aquatic plants"
Registros recuperados: 30
Data/hora: 17/06/2024 03:32:04

Viabilidade de um banco de sementes de macrófitas aquáticas da Caatinga após armazenamento.
Provedor de dados: 119
Autores: GOMES, R. A.; ALENCAR, S. de S.; FREIRE, J. N. T.; PEREIRA, M. C. T.; DANTAS, B. F.
Este estudo teve como objetivo avaliar a viabilidade do banco de sementes de macrófitas aquáticas de uma lagoa intermitente da Caatinga após 3 anos de armazenamento em câmara fria.
Tipo: Parte de livro
Palavras-chave: Macrófita; Semente; Planta Aquatica; Caatinga; Aquatic plants; Natural resources.
Ano: 2018
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1097769

Flora aquática e sua potencialidade como indicadora de biodiversidade e poluição no Estado do Pará, resultados preliminares.
Provedor de dados: 119
Autores: MACQUEEN, A.; MARTINS-DA-SILVA, R. C. V.; RAIOL, H. J.
Tipo: Separatas
Palavras-chave: Nymphaea amazonum; Naviculla; Enota; Rio Bar; Rio Moju; Pará; Brasil.; Impacto Ambiental; Poluição da Água.; Planta Aquatica; Amazonia; Aquatic plants; Environmental impact; Water pollution.
Ano: 1998
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/398808

New records of the invasive macrophyte, Urochloa arrecta extend its range to eastern Brazilian Amazon altered freshwater ecosystems
Provedor de dados: 36
Autores: FARES,Ana Luisa Biondi; NONATO,Flávia Alessandra da Silva; MICHELAN,Thaísa Sala.
ABSTRACT Invasive species influence the structure and functioning of ecosystems, as they affect native species, significantly decreasing their diversity. Aquatic ecosystems harbor a great biodiversity, and invasive macrophytes significantly affect the native plant communities, causing a cascade effect on other trophic levels. Among invasive macrophytes, Urochloa arrecta is cause for concern in the Neotropics and is found in several regions of Brazil, specially in the southeastern and southern regions. So far the species had been recorded only in the northern state of Amazonas. We report the first record of the species in the state of Pará, in the eastern Brazilian Amazon. We emphasize that identifying sites where this species is invasive is the best...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Aquatic plants; Invasion ecology; Grasses; Poaceae; Amazonas state; Pará state.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000200133

Influence of aquatic plants on the predation of Piaractus mesopotamicus larvae by Pantala flavescens - doi: 10.4025/actascibiolsci.v32i2.5167
Provedor de dados: 3
Autores: Lacerda, Carlos Henrique Figueiredo; Hayashi, Carmino; Soares, Claudemir Martins; UEM; Fernandes, Carlos Eduardo Bento; UEM.
The experiment aimed to study the influence of the aquatic plants E. najas, P. stratiotes and S.  auriculata on the predation of P. mesopotamicus larvae by P. flavescens. One hundred and twenty larvae of P.  mesopotamicus and 24 larvae of P.  flavescens were placed in 24 aquariums with capacity of 12 L, with one Odonate per aquarium. Treatments were different regarding the species of aquatic plants E. najas, S. auriculata and P.  stratiotes, with one control treatment without aquatic plants. One aquarium (12 L) containing one Odonate and 30 P.  mesopotamicus larvae was considered one experimental unit. After 18 hours, the Odonates were removed from the aquariums and fish larvae left (alive) were counted in each experimental unit. The survival rate of P....
Palavras-chave: Larvae; Piaractus mesopotamicus; Pantala flavescens; Predation; Aquatic plants Larvae; Piaractus mesopotamicus; Pantala flavescens; Predation; Aquatic plants.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5167

Cadmium-induced oxidative stress and antioxidative enzyme response in water hyacinth and salvinia
Provedor de dados: 61
Autores: Vestena,Silvane; Cambraia,Jose; Ribeiro,Cleberson; Oliveira,Juraci A.; Oliva,Marco A.
The reactive oxygen species generation, lipid peroxidation and antioxidative enzyme response of water hyacinth and salvinia to Cd were evaluated. Cadmium was absorbed/accumulated mainly in the roots, but significant amounts also translocated to the leaves. No Cd effect on dry weight was detected, although toxicity symptoms were visible. Superoxide and H2O2 concentrations increased, in addition to lipid peroxidation in both species, especially in the leaves of salvinia. In general, antioxidative enzyme activities were reduced in both species following Cd treatment, especially in salvinia. Glutathione peroxidase (GPX, EC 1.11.1.9) activity decreased in water hyacinth but increased in salvinia. Glutathione S-transferase (GST, EC 2.5.1.18) activity increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic plants; Eichhornia crassipes; Metal toxicity; Oxidative stress; Salvinia auriculata.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000200005

Plantas aquáticas do Pantanal.
Provedor de dados: 14
Autores: POTT, V. J.; POTT, A.
Valor das plantas aquaticas; Identificacao; Dinamica; O que e planta aquatica; Formas biologicas; Principais ambientes aquaticos do Pantanal; Dispersao geografica; Chaves para as especies; Especies: Characeae; Ricciaceae; Adiantaceae; Azollaceae; Equisetaceae; Isoetaceae; Marsileaceae; Parkeriaceae; Salviniaceae; Thelypteridaceae; Acanthaceae; Alismataceae; Amaranthaceae; Apiaceae (Umbelliferae); Apocynaceae; Araceae; Asteraceae (Compositae); Cabombaceae; Campanulaceae; Cannaceae; Ceratophyllaceae; Commelinaceae; Convolvulaceae; Cucurbitaceae; Cyperaceae; Euphorbiaceae; Gentianaceae; Hydrocharitaceae; Hydrophyllaceae; Laminaceae (Zabiatae); Leguminosae - Fabaceae (Papilionatae); Leguminosae - Mimosaceae (Mimosoideae); Lemnaceae; Lentibulariaceae;...
Tipo: Livros
Palavras-chave: Pantanal Mato-Grossense; Aquatic plant; Botânica; Planta Aquatica; Botany; Aquatic plant culture; Aquatic plants; Aquatic habitat.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/806137

Cultivo da azolla em várzea do rio Guamá, estuário amazônico.
Provedor de dados: 14
Autores: MODESTO JUNIOR, M. de S.; MASCARENHAS, R. E. B.; FERREIRA, W. de A.
Tipo: Folhetos
Palavras-chave: Controle de erva daninha; Rio guama; Pará; Brasil; Cultural methods; Azolla; Arroz; Colheita; Mururé Rendado; Pratica Cultural; Produtividade; Planta Aquatica; Sistema de Cultivo; Várzea; Amazonia; Aquatic plants; Harvesting; Cropping systems; Rice; Weed control; Yields.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375922

Potencial de uso de plantas aquáticas na despoluição da água.
Provedor de dados: 14
Autores: POTT, V. J.; POTT. A.
A água é um bem limitado, razão da crescente preocupação com os recursos hidrícos e a qualidade ambiental. A poluião é um sério problema que impacta nascentes e cursos d'agua, havendo necessidade urgente de pesquisas de tratamento e de preservação. Uma das formas de tratamento de esgoto é a utilizção de filtros biológicos, com brejos construídos, ou de lagoas com plantas aquáticas. Tanques com plantas aquáticas assim como brejos agem com filtros de poluentes, ajudando a devolver a água limpa aos manaciais. Algumas plantas despoluidoras são sugeridas pela sua capacidade de retirar da água nutrientes e substâncias tóxicas, dando condições favoráveis para a base alimentar nos ecossistemas aquáticos. Lemnaceas ou lentilhas d'água são muito usadas no caso das...
Tipo: Folhetos
Palavras-chave: Poluição da Água; Planta Aquatica; Tratamento da Água; Aquatic plants; Water pollution; Water purification.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325560

Simple relationships to predict attributes of fish assemblages in patches of submerged macrophytes
Provedor de dados: 83
Autores: Pelicice,Fernando Mayer; Thomaz,Sidinei Magela; Agostinho,Angelo Antonio.
Submerged macrophytes play an important role in structuring habitats and, therefore, in determining patterns of aquatic biodiversity. Because these plants are widespread in shallow areas of many Neotropical reservoirs, the present work investigated if variables related to habitat structure, measured in patches of submerged macrophytes (Egeria densa and E. najas), can be used to predict fish assemblage attributes (fish density and species richness). Based on patch characteristics at fine spatial extents (macrophyte patches within reservoir arms), we considered plant biomass, volume and proportional volume (i.e. percentage of macrophyte volume in the water column) as potential predictors. Fish and macrophytes were sampled with a 1-m² throw trap in littoral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic plants; Habitat structure; Predictive ecology; Variability; Tropical reservoir.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400001

The role of vegetated areas on fish assemblage of the Paraná River floodplain: effects of different hydrological conditions
Provedor de dados: 83
Autores: Neiff,Juan José; Neiff,Alicia Poi de; Verón,Marta B. Canón.
In this paper, we analyze the changes in composition and abundance of fish assemblages in seven vegetated floodplain wetlands with different connectivity across different hydrologic conditions: after a prolonged connection of the floodplain with the main channel, during receding water, and after a prolonged isolation. We also investigated the size and abundance of large-sized migratory species found in these wetlands and the food resources exploited by the dominant fish. Fishes were captured by diurnal seining (8.0 m x 1.50 m, 5 mm mesh) along macrophyte banks. Despite the high total number of species registered (100), sample species richness varied between 7 and 31, depending on the sampling site and the sampling date. Cluster analysis indicated low...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish diversity; Fish diet; Floodplain wetlands; Aquatic plants.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100006

Novel Pharmaceuticals from Kenyan Marine Cyanobacteria
Provedor de dados: 20
Autores: Dzeha, T.
Two projects undertaken at the Heriot-Watt University, Edinburgh, U.K as part of the WIOMSA Marg II Programme are presented here. Project 1 was on studies carried out on the Kenyan marine cyanobacterium Lyngbya majuscula, which was collected from Shimoni, 100 km south of Mombasa, Kenya and ferried to the U.K on 12th October 2003. Specifically, L. majuscula was investigated on the potential for bioprocess intensified production of secondary metabolites with therapeutic potential, the Chemistry of its secondary metabolites and that of the cultures, and on the 16S rDNA classification of its epiphytic bacteria isolates. Project 2 focused on the isolation of cell-cell signaling inducer compounds from biofilms of marine bacteria Bacillus licheniformis EI-34-6.
Tipo: Report
Palavras-chave: Pharmaceuticals; Aquatic plants; Medical plants Bacteria Pharmaceutical products Bacteria Pharmaceutical plants http://aims.fao.org/aos/agrovoc/c_765 http://aims.fao.org/aos/agrovoc/c_13278.
Ano: 2004
URL: http://hdl.handle.net/1834/1291

Flores marinas. ¿Quién lo imaginaría?
Provedor de dados: 20
Autores: Ibarzábal, Diana.
Aborda la alimentación, diferencias y semejanzas,  especies perjudiciales así como la presencia de poliquetos en Cuba, destacando los más abundantes.
Tipo: Journal Contribution
Palavras-chave: 1241; Aquatic organisms; Aquatic plants; Aquatic organisms; Aquatic plants; Http://aims.fao.org/aos/agrovoc/c_557; Http://aims.fao.org/aos/agrovoc/c_559.
Ano: 2009
URL: http://hdl.handle.net/1834/4076

Effect of ecological and biological factors on the uptake and concentration of trace elements by aquatic organisms at Edku lake
Provedor de dados: 20
Autores: Abbas, M.M.; Shakweer, L.
The effect of temperature, pH and trace elements concentration in the ambient water on the uptake and accumulation of Cu, Zn, Ni and Pb in various organs of fish and parts of aquatic plants of Edku Lake were studied. It was found that higher water temperature and lower pH during summer increased the rates of trace metals uptake by the most common fish species Oreochromis niloticus. The concentrations of Cu, Zn, and Ni in the various organs of fish were affected by the concentrations of these elements in the water. Cu, Zn, Ni and Pb attained higher concentrations in the roots of Eichormia crassipes if compared with their concentrations in the other parts of this aquatic plant. Sex of fish can be considered as an important factor affecting the accumulation...
Tipo: Journal Contribution
Palavras-chave: Trace elements; Fish; Aquatic plants; Pollution Accumulation Environments Lake fisheries Lakes Lake fisheries Lakes Environment http://aims.fao.org/aos/agrovoc/c_4159 http://aims.fao.org/aos/agrovoc/c_4160 http://aims.fao.org/aos/agrovoc/c_2593.
Ano: 2005
URL: http://hdl.handle.net/1834/1249

Catalogue des ennemis naturels des macrophytes flottants Pistia stratiotes, Salvinia molesta et Eichhornia crassipes
Provedor de dados: 20
Autores: Sankaré, Yacouba.
Nous avons déterminé, à partir d'une étude bibliographique et de nos observations sur le terrain quarante deux espèces animales comprenant essentiellement des mollusques et des insectes. Ces animaux s'attaquent aux plantes flottantes Eichhornia crassipes, Pistia stratiotes et Salvinia molesta. Ils consomment ou détruisent indifféremment les plantes précitées sauf Neochetina bruchi, Neochetina eichhorniae et Sameodes albiguttalis qui s'attaquent spécifiquement à E. crassipes; Neohydronomus putchellus, Lanistes guinaicus et Pila africana broutent préférentiellement P. stratiotes; Cyrtobagous salviniae, Cyrtobagous singularis et Paulinia acuminata consomment uniquement S. molesta.
Tipo: Journal Contribution
Palavras-chave: Aquatic plants; Marine invertebrates; Predators.
Ano: 1991
URL: http://hdl.handle.net/1834/5740

Les gastéropodes aquatiques associés aux plantes flottantes.
Provedor de dados: 20
Autores: Sankaré, Yacouba.
L'échantillonnage des gastéropodes effectué au niveau racinaire des plantes flottantes Pistia stratiotes, Salvinia molesta, Salvinia nymphellula, Eicchornia crassipes montre que celles-ci ne sont pas azoïques.On a récolté 18 espèces de gastéropodes.La cartographie des espèces collectées a permis d'identifier trois régions et trois types de peuplements de gastéropodes: -les gastéropodes rencontrés entre 5° et 7° au sud. -Les gastéropodes rencontrés entre 8° et 10° au nord. -Les gastéropodes à large répartition. La répartition des gastéropodes en relation avec la latitude a permis de voir que 90% des espèces se rencontrent entre 5° et 6°sud, 65% entre 6° et 7°sud, et 20% entre 7° et 8°, 20% entre 8° et 9° et enfin 15% entre 9°et 10°nord.
Tipo: Journal Contribution
Palavras-chave: Gastropod fisheries; Aquatic plants.
Ano: 1991
URL: http://hdl.handle.net/1834/5743

Contribution à l'étude de la croissance de la fougère aquatique Salvinia molesta (Mitchell), Salviniaceae
Provedor de dados: 20
Autores: Etien, N.; Sankaré, Y.; Kaba, N.
La croissance des formes primaire (forme colonisatrice) et tertiaire (forme en "tapis dense") de la fougère d'eau Salvinia molesta (Salviniaceae) a été suivie pendant 60 jours dans des récipients de surface de 0.06m2 et contenant de l'eau douce. La croissance en fonction du temps de cette espèce est exponentielle. Les deux formes d'expansion présentent des taux de croissance statistiquement identiques. L'accroissement journalier moyen, exprimé en nombre de feuilles, est égal à 6,40% par jour pour la forme colonisatrice et à 5,90% par jour pour la forme en "tapis dense" avec des temps de doublement moyens équivalents à 10,78+_ 1.08 jours et à 11.64+_ 0,15 jours.
Tipo: Journal Contribution
Palavras-chave: Aquatic plants; Growth.
Ano: 1991
URL: http://hdl.handle.net/1834/5162

Biodiversidad vegetal acuática de los humedales del río Chepu (Chiloé, Región de Los Lagos, Chile)
Provedor de dados: 20
Autores: González López, C.A.
Se estudió la biodiversidad vegetal acuática y palustre de la Laguna Coluco que forma parte de los Humedales del río Chepu (Chiloé, Chile). La hoya hidrográfica del río Chepu comprende la laguna Coluco y los tributarios de la cuenca: ríos Huentru, Negro, Puntra, Grande, Coluco, abarcando aproximadamente 100 km^2. Los muestreos de terreno se realizaron con la metodología fitosociológica de la Escuela Zürich – Montpellier. Con los censos de vegetación levantados a lo largo del transecto, se confeccionó una tabla fitosociológica inicial con 120 censos y 88 especies vegetales. Esta tabla fue ordenada con los métodos tradicionales, lográndose determinar las 16 asociaciones siguientes: Myriophylletum aquaticum, Potametum pectinatii, Juncetum bulbosii, Potametum...
Tipo: Theses and Dissertations
Palavras-chave: Biodiversity; Community composition; Wetlands; Vegetation cover; Aquatic plants.
Ano: 2005
URL: http://hdl.handle.net/1834/4916

Macrophytes of Lake Victoria and succession after invasion of Water Hyacinth
Provedor de dados: 20
Autores: Omondi, R.; Kusewa, Mwende.
The distribution of Lake Victoria (Kenya) macrophytes is described. Succession of macrophytes in the lake became more dramatic and dynamic after invasion of water hyacinth. The weed pushes and smothers other free-floating macrophytes like Pistia stratiotes. It then provides substrates for the emergent Vossia cuspidata, which later reduces its population by competition for light and nutrients. The noxious weed is believed to have led to extinction of Azolla nilotica in the lake.
Tipo: Proceedings Paper
Palavras-chave: Aquatic plants; Ecological succession; Introduced species; Species extinction; Inland waters; Water reservoirs; Geographical distribution; Emergent vegetation; Competition; Water bodies; Aquatic plants; Water hyacinth; Http://aims.fao.org/aos/agrovoc/c_559; Http://aims.fao.org/aos/agrovoc/c_15267.
Ano: 2006
URL: http://hdl.handle.net/1834/1496

The effect of water Hyacinth, Eichhornia Crassipes, infestation on phytoplankton productivity in Lake Naivasha and the status of control
Provedor de dados: 20
Autores: Mironga, John Momanyi.
The paper presents data collected in an assessment of effects of water hyacinth infestation on phytoplankton productivity in Lake Naivasha, Kenya. A summary of the status of control and strategies for the future is given. The ecological effects of water hyacinth, Eichhornia Crassipes, on Lake Naivasha have received little attention compared to the large body of work available on the weed’s socioeconomic impact on the country’s water ways and methods for its removal. This study was conducted to determine if water hyacinth infestation in Lake Naivasha affects phytoplankton productivity. Several sampling stations were set up in the lake at sites where the floating mats of the weed were present and sites where the weed was absent. Phytoplankton chlorophyll-a...
Tipo: Proceedings Paper
Palavras-chave: Aquatic plants; Freshwater weeds; Infestation; Primary production; Ecological crisis; Environmental effects; Check lists; Species diversity; Phytoplankton; Socioeconomic aspects; Biodiversity; Community composition; Primary production; Aquatic plants; Species diversity; Water hyacinth; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_559; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_15267.
Ano: 2006
URL: http://hdl.handle.net/1834/1497

Effectiveness of Diquat, Copper Hydroxide, Copper Oxychloride and their Association in Control of Submerged Macrophytes Ceratophyllum demersum
Provedor de dados: 87
Autores: GARLICH,N.; CRUZ,C.; SILVA,A.F.; MALASPINA,I.C.; FERREIRA,R.G.; TEDESQUE,M.G.; PITELLI,R.A.; BIANCO,S.
The aims of this study were to evaluate the effectiveness of diquat, copper hydroxide, copper oxychloride and their associations diquat + 0.1% copper oxychloride and diquat + 0.1% copper hydroxide to control Cerathophyllum demersum. Therefore, the concentrations used were 0.1, 0.3, 0.5, 0.7, 1.0 and 1.5 mg L-1 oxychloride and copper hydroxide and 0.2, 0.4, 0.8 and 1.2 mg L-1 diquat and their associations with 0.1% copper oxychloride and 0.1% copper and a control hydroxide. The experimental design was completely randomized with ten replications for 45 days. For evaluation we used a scale of 0-100% control of notes and rated the weight (g) and length (cm) of pointers at the end of the trial period. Diquat showed 100% efficacy at 30 DAA, associations in 21...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic plants; Algaecide effect; Chemical management.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100117

The addition of adjuvants on glyphosate enhances the control of aquatic plant Myriophyllum aquaticum (Vell.)
Provedor de dados: 87
Autores: R. Cerveira Jr.,Wilson; F. Silva,Adilson; H.C. Cervoni,João; Cruz,Claudinei; A. Pitelli,Robinson.
Abstract  Background:  Knowledge about the action of glyphosate alone and associated with adjuvants in the effectiveness to control aquatic plants is important in the decision-making on its use.  Objective:  This study aimed to evaluate the effectiveness of glyphosate and five adjuvants in the control of Myriophyllum aquaticum.  Methods:  Glyphosate (Rodeo®) at doses of 1.5, 3.5, 5.5, and 7.5 L ha-1 was sprayed alone and associated with Aterbane® BR, Veget’oil®, Dash® HC, Assist®, and Agral® (0.5% v v-1), in addition to the control, with a spray solution volume of 200 L ha-1. The effectiveness of control was evaluated using the scores of a visual scale at 3, 7, 15, 21, 30, 45, and 60 days after application (DAA), regrowth, and dry matter accumulation at 60...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemical management; Parrot feather watermilfoil; Aquatic plants.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100331

MACROPHYTE BIOASSAY APPLICATIONS FOR MONITORING PESTICIDES IN THE AQUATIC ENVIRONMENT
Provedor de dados: 87
Autores: VECHIA,J.F. DELLA; CRUZ,C.; SILVA,A.F.; CERVEIRAJR.,W.R.; GARLICH,N.
ABSTRACT The objective of this study was to evaluate the feasibility of the use of macrophytes Lemna minor and Azolla caroliniana as biomarkers of exposure (acute toxicity) for atrazine, bentazon + imazamox and clomazone, insecticide alpha cypermethrin + teflubenzuron and fungicides pyraclostrobin and mixture pyraclostrobin + epoxiconazole, as well as the risk for environmental intoxication. For this purpose, four plants of L. minor and five of A. caroliniana were selected in a 50 mL Hoagland medium. For both plants, the following concentrations were used: 0.10; 1.07; 3.44; 11.16; 36.40 and 118.0 mg L-1 of each test product and a control with three replicates. The results of this study demonstrated higher sensitivity of L. minor to the tested pesticides,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindication; Aquatic plants; Acute toxicity; Environmental monitoring; Pesticide.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300597

Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions
Provedor de dados: 87
Autores: PERES,L.R.S.; DELLA VECHIA,J.F.; CRUZ,C.
ABSTRACT: The goal of the study was to evaluate the effect of 2.4-D and clomazone doses on the growth of the submerged macrophytes Egeria densa and E. najas, in microassay conditions. Therefore, tests were conducted in a bioassay room at the temperature of 27.0 ± 2.0 °C, photoperiod of 24 light hours and illumination of 500 lux. The apical fragments (shoot tips) of the macrophytes with 5.0 cm of length were transferred to test tubes with a 100 mL capacity, containing 70 mL of water. The tested concentrations were: 0.1; 1.0; 3.5; 11.2; 36.5; and 118.0 mg L-1 and a control sample with seven replications. In the test with 2.4-D on E. densa, in the control sample treatment and the 0.1 mg L-1 treatment there was shorter length: at 1.0; 3.5; 11.2; 36.5 and 118.0...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth stimulation; Aquatic plants; Environmental dynamics; Pesticides.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100275

Potential of macrophyte for removing arsenic from aqueous solution
Provedor de dados: 87
Autores: Guimaraes,F.P.; Aguiar,R.; Oliveira,J.A.; Silva,J.A.A.; Karam,D.
The potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L-1. The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bio-remediation; Phyto-remediation; Aquatic plants; Pollutant.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000400001

EFFECTS OF RESERVOIR AQUATIC PLANT MANAGEMENT ON RECREATIONAL EXPENDITURES AND REGIONAL ECONOMIC ACTIVITY
Provedor de dados: 31
Autores: Bergstrom,   John C.; Teasley,   R. Jeff; Cordell,   H. Ken; Souter,   Ray A.; English,   Donald B.K.
Exotic aquatic plant management is a major concern for public reservoir management in many regions of the United States. A study was conducted to measure the effects of alternative aquatic plant management strategies on recreational expenditures and regional economic activity. The study areas was Lake Guntersville, Alabama, and the local economy surrounding the lake. Lake Guntersville is one of the largest reservoirs in the Tennessee Valley Authority system. Results suggested the relatively moderate levels of aquatic plant control are associated with the highest levels of recreation-related economic effects on the economy surrounding Lake Guntersville.
Tipo: Journal Article
Palavras-chave: Aquatic plants; Input-output analysis; Public reservoir management; Recreational expenditures; Regional economic activity; Resource /Energy Economics and Policy.
Ano: 1996
URL: http://purl.umn.edu/15120

National Conference on Irrigation for Food Security Voluume 1; Proceedings on Water, Food Security and Climate Change in Sri Lanka, EMICH, Colombo, June 9-11, 2009
Provedor de dados: 31
Tipo: Presentation
Palavras-chave: Food security; Climate change; River basins; Water shortage; Irrigated farming; Water quality; Tanks; Aquatic plants; Rice; Food insecurity; Water resource management; Zero tillage; Weed control; Agroforestry; Canals; Surface runoff; Remote sensing; Agricultural and Food Policy; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Livestock Production/Industries; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/118419

Estimating the Value of Invasive Aquatic Plant Control:  A Bioeconomic Analysis of 13 Public Lakes in Florida
Provedor de dados: 31
Autores: Adams,   Damian C.; Lee,   Donna J.
We present a bioeconomic model of three invasive aquatic plants (hydrilla, water hyacinth, and water lettuce) in 13 large Florida lakes, and simulate one-year and steady-state impacts of three control scenarios.  We estimate that the steady-state annual net benefit of invasive plant control is $59.95 million.  A one-year increase in control yields steady-state gains of $6.55 million per year, and a one-year lapse causes steady-state annual losses of $18.71 million.  This model shows that increased control of hydrilla, water hyacinth, and water lettuce is optimal.
Tipo: Journal Article
Palavras-chave: Aquatic plants; Bioeconomics; Invasive species; Lakes; Maintenance control; Q57; Q26; Q28; Q51; Q25.
Ano: 2007
URL: http://purl.umn.edu/37139

Floristic surveys of aquatic macrophytes in reservoirs in the Agreste zone of Pernambuco State, Brazil
Provedor de dados: 88
Autores: Xavier,Leonardo Rafael Chaves Coelho; Araújo,Talita Oliveira; Nascimento,Paula Regina Fortunato; Pereira,Sonia Maria Barreto.
We surveyed the aquatic macrophytes in reservoirs in Camocim de São Félix in the Agreste zone of Pernambuco State, Brazil. Plants were collected on a bimonthly schedule from November/2008 to May/2009 in four reservoirs, and 33 taxa distributed among 23 families were encountered. The family Cyperaceae had the greatest number of species, followed by Lemnaceae. The predominant biologic form was emergent (33.3%) reflecting the extensive shorelines around the reservoirs analyzed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic plants; Biologic forms; Northeastern Brazil.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000400004

Alismatales from the upper and middle Araguaia river basin (Brazil)
Provedor de dados: 88
Autores: Koehler,Samantha; Bove,Claudia Petean.
The present study deals with a survey of the order Alismatales (except Araceae) in the upper and middle Araguaia River region located between the states of Mato Grosso and Goiás, Brazil. Field expeditions were carried out during the rainy and dry seasons. The route covered approximately 2,000 km and 41 aquatic environments were visited. Thirteen taxa, representing the families Alismataceae (nine), Hydrocharitaceae (three) and Najadaceae (one) were identified. Keys for the identification of families and species in field, brief diagnoses, schematic illustrations and relevant comments were elaborated based on field observations as well as on the analysis of the specimens collected.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alismatales; Aquatic plants; Araguaia river; Brazil; Hydrophytes.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000300005

Orthoptera assemblages associated with macrophytes of floodplain lakes of the Paraná River
Provedor de dados: 92
Autores: Capello,Soledad; Marchese,Mercedes; De Wysiecki,María L.
Orthoptera assemblages associated with macrophytes of floodplain lakes of the Paraná River. The Orthoptera assemblage composition varies considerably, depending on habitat type. This study examines the spatiotemporal relationship between plant diversity, hydrometric level, environmental variables and the Orthoptera richness and abundance in floodplain lakes connected permanently or temporarily with the main channel of the Paraná River. The grasshoppers were collected fortnightly (April 2006May 2007). A total of 17 species were recorded and classified according to their frequency of occurrence in constant (7), accessory (4), or accidental (6) species. In the two lakes, the greater species richness and abundance was recorded in summer, thereby coinciding...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acrididae; Aquatic plants; Diversity index; Hydrological level; Insecta; Tettigonidae.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262013000100010