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Registros recuperados: 28
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Alismatales from the upper and middle Araguaia river basin (Brazil) Rev. Bras. Bot.
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
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Biodiversidad vegetal acuática de los humedales del río Chepu (Chiloé, Región de Los Lagos, Chile) OceanDocs
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
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Cadmium-induced oxidative stress and antioxidative enzyme response in water hyacinth and salvinia Braz. J. Plant Physiol.
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
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Catalogue des ennemis naturels des macrophytes flottants Pistia stratiotes, Salvinia molesta et Eichhornia crassipes OceanDocs
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
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Contribution à l'étude de la croissance de la fougère aquatique Salvinia molesta (Mitchell), Salviniaceae OceanDocs
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
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Cultivo da azolla em várzea do rio Guamá, estuário amazônico. Infoteca-e
MODESTO JUNIOR, M. de S.; MASCARENHAS, R. E. B.; FERREIRA, W. de A..
1999
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Murure rendado; Planta aquatica; Pratica cultural; Controle de erva daninha; Produtividade; Colheita; Arroz; Sistema de cultivo; Varzea; Rio guama; Pará; Amazonia; Brasil; Aquatic plants; Cultural methods; Weed control; Yields; Harvesting; Rice; Cropping systems; Azolla.
Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/375922
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Effect of ecological and biological factors on the uptake and concentration of trace elements by aquatic organisms at Edku lake OceanDocs
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
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Effectiveness of Diquat, Copper Hydroxide, Copper Oxychloride and their Association in Control of Submerged Macrophytes Ceratophyllum demersum Planta Daninha
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
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EFFECTS OF RESERVOIR AQUATIC PLANT MANAGEMENT ON RECREATIONAL EXPENDITURES AND REGIONAL ECONOMIC ACTIVITY AgEcon
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
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Estimating the Value of Invasive Aquatic Plant Control: A Bioeconomic Analysis of 13 Public Lakes in Florida AgEcon
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
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Flora aquática e sua potencialidade como indicadora de biodiversidade e poluição no Estado do Pará, resultados preliminares. Repositório Alice
MACQUEEN, A.; MARTINS-DA-SILVA, R. C. V.; RAIOL, H. J..
1998
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Planta aquática; Poluição da água; Impacto ambiental; Nymphaea amazonum; Naviculla; Enota; Rio Bar; Rio Moju; Pará; Amazônia; Brasil; Aquatic plants; Water pollution; Environmental impact.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/398808
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Flores marinas. ¿Quién lo imaginaría? OceanDocs
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
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Floristic surveys of aquatic macrophytes in reservoirs in the Agreste zone of Pernambuco State, Brazil Rev. Bras. Bot.
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
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Hormesis Effect of Herbicides Subdoses on Submerged Macrophytes in Microassay Conditions Planta Daninha
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
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Influence of aquatic plants on the predation of Piaractus mesopotamicus larvae by Pantala flavescens - doi: 10.4025/actascibiolsci.v32i2.5167 Biological Sciences
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
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Les gastéropodes aquatiques associés aux plantes flottantes. OceanDocs
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
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MACROPHYTE BIOASSAY APPLICATIONS FOR MONITORING PESTICIDES IN THE AQUATIC ENVIRONMENT Planta Daninha
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
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Macrophytes of Lake Victoria and succession after invasion of Water Hyacinth OceanDocs
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
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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 AgEcon
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
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Novel Pharmaceuticals from Kenyan Marine Cyanobacteria OceanDocs
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
Registros recuperados: 28
Primeira ... 12 ... Última
 

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