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The effect of connectivity on the relationship between local and regional testate amoebae species richness was investigated in two floodplain lagoons in the Upper Parana River. Regional species pool was positively correlated with local species richness in the lagoon highly connected to the associated river. This result indicates the importance of connectivity and regional processes such as dispersal...
The occurrence and abundance of testate amoebae in the zooplankton of the floodplain of the Upper Paraná River was studied and compared with other zooplankton groups. Results showed that testate amoebae were dominant zooplankters in littoral zones of lentic and lotic environments. Species of Arcellidae were most abundant, followed by Difflugidae and Centropyxidae. The influence of environmental heterogeneity...
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