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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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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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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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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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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
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Phosphorus requirements of Azolla microphylla International Rice Research Institute
Arora, A.; Saxena, S..
p.25-26
Palavras-chave: Aquatic plants; Growth; Nutrient requirements; Phosphorus; Azolla microphylla.
Ano: 2005 URL: http://hdl.handle.net/123456789/1155
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Potencial de uso de plantas aquáticas na despoluição da água. Infoteca-e
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: Documentos (INFOTECA-E) Palavras-chave: Poluição da água; Planta aquática; Tratamento da água; Water pollution; Aquatic plants; Water purification.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/325560
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Simple relationships to predict attributes of fish assemblages in patches of submerged macrophytes Neotropical Ichthyology
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
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The effect of water Hyacinth, Eichhornia Crassipes, infestation on phytoplankton productivity in Lake Naivasha and the status of control OceanDocs
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
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The role of vegetated areas on fish assemblage of the Paraná River floodplain: effects of different hydrological conditions Neotropical Ichthyology
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
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Viabilidade de um banco de sementes de macrófitas aquáticas da Caatinga após armazenamento. Repositório Alice
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: Artigo em anais de congresso (ALICE) Palavras-chave: Macrófita; Semente; Planta Aquatica; Caatinga; Aquatic plants; Natural resources.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1097769
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