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Rotifer community structure along a stretch under the influence of dams in the Upper Paraná River floodplain Biological Sciences
Mantovano, Tatiane; Arrieira, Rodrigo Leite; Schwind, Leilane Talita Fatoreto; Bonecker, Claudia Costa; Lansac-Tôha, Fábio Amodêo.
The construction of reservoirs imposes substantial impact on freshwater ecosystems and changes the ecological aspects of the lotic system downstream of dams. We hypothesized an increasing dissimilarity between communities in the sampling sites according to increasing distance from the Porto Primavera Dam. In addition, we expect that the rotifer community in the last sampling site will be influenced more by environmental variables related to trophic status. Samplings were conducted under the water surface of ten sites on the Paraná River in August 2013. Environmental variables were also determined. The highest number of taxa belonged to families Brachionidae, Lecanidae and Trichocercidae. The most abundant species was observed to Synchaeta oblonga,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecologia; Comunidades aquáticas; Ecologia de comunidades rotifer; Trophic status; Composition; Longitudinal distribution Ecologia.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/27759
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Species composition of testate amoebae in Lake Monte Alegre, Ribeirão Preto, SP, Brazil Biological Sciences
Mousinho, Lucas Pessanha; Silva, Mariana Lessa Carneiro da; Arrieira, Rodrigo Leite; Schwind, Leilane Talita Fatoreto.
We aimed to perform the first survey of testate amoebae community composition in Lake Monte Alegre at São Paulo state, and contribute to mitigate the taxonomic impediment regarding the diversity of testate amoebae in Brazil. Samplings were performed in 20 sampling sites within the lake, in the limnetic and littoral regions in April 2015, using a 58 µm-meshplankton net. We identified 20 taxa of testate amoebae belonging to four families: Arcellidae (8 taxa), Centropyxidae (4 taxa), Difflugiidae (7 taxa) and Lesquereusiidae (2 taxa). The littoral region showed the highest number of taxa (n = 20), whereas in the limnetic region 11 taxa were registered. Therefore, our results evidenced the importance of testate amoebae in aquatic systems, and that further...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ciências Biológicas/Taxonomia protozoa; Species richness; Zooplankton; Taxonomy. Ecologia.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/36768
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