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| Registros recuperados: 28 | |
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| 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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| 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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| 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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| 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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| 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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| 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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| 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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| 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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| 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 |
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| Registros recuperados: 28 | |
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