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Effects of natural banks of free-floating plants on zooplankton community in a shallow subtropical lake in Southern Brazil BABT
Gazulha,Vanessa; Montú,Mônica; Marques,David da Motta; Bonecker,Claúdia Costa.
The aim of this study was to test the effects of natural free-floating plants on zooplankton distribution in a shallow subtropical lake. First, the hypothesis that free-floating plants have an effect on physico-chemicals, leading to a decrease on nutrient availability and influencing the phytoplankton biomass and zooplankton community was tested. Second, the hypothesis that free-floating plants act as a refuge for zooplankton was tested. Three microhabitats were selected: free-floating plants, littoral area and open water. Results demonstrated that the effects of different microhabitats on phytoplankton biomass and physico-chemicals were not significant, indicating a weak influence of the plants. Zooplankton densities were higher in free-floating plants...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macrophytes; Refuge; Spatial distribution; Tropical zooplankton.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400014
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Comparative study of the zooplankton composition of six lacustrine ecosystems in Central Brazil during the dry season BJB
STARLING,F. L. do R. M..
Zooplankton community from six lacustrine ecosystems located in Federal District (Central Brazil) was studied based on samples collected during the dry season (July to September). A total of 71 taxa were recorded: 44 rotifers, 17 cladocerans and 10 copepods. The highest number of zooplankton species was recorded in oligotrophic Bonita Pond (32 species) and the lowest number in hypertrophic waste stabilisation ponds (7 species). This tendency of decreasing the diversity with increasing trophic level was consistent with a cluster analysis of the samples based on Sorensen index of similarity. From the overall similarity dendrogram, two groups of ecosystems were distinguished: one containing the natural ponds Bonita and Formosa and the other comprising the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zooplankton taxonomy; Tropical zooplankton; Trophic state.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100013
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