River channel habitat diversity (RCHD) and macroinvertebrate community |
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Authors: | Ji?í Koke? |
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Institution: | (1) Department of Limnology, Institute of Animal Evolution and Ecology, University of Muenster, Muenster, D-48149, Germany;(2) Research Group for Limnology, Institute of Ecology, University of Jena, Jena, D-07745, Germany;(3) Department of Limnology, Institute of Animal Evolution and Ecology, University of Muenster, Muenster, D-48149, Germany |
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Abstract: | Correspondence of habitat and macroinvertebrate diversity was investigated in twenty Czech rivers. With regard to the importance
of river characteristics (depth, current velocity and substratum) River Channel Habitat Diversity method was developed within
this paper. The method is focused directly on the stream wetted channel and it assesses habitat diversity and richness computed
as Shannon-Wiener’s index. Macroinvertebrate samples were taken by the national PERLA method at each study site, diversity
index was also calculated and compared with habitat and substrate diversity. Habitat diversity was important for macroinvertebrate
communities according to multivariate assessment, but contrary to the hypothesis it was not significantly correlated with
macroinvertebrate diversity. Based on the results, broader rivers had lower habitat diversity than smaller streams, and were
more influenced by human activities (lower habitat diversity, higher pollution). Results obtained by the RCHD and RHS methods
were not significantly correlated. |
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