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By: Callisto, Marcos - Goulart, Michael D. C. - Barbosa, F. A. R. - Rocha, O.Type: ArticleIn: Instituto Internacional de EcologiaVolume:Series:Issue:Date: 2005-05-01Page Range:Publication Info: Instituto Internacional de Ecologia 2005-05-01Subjects: benthic macroinvertebrates biodiversity assessment reservoir reservoir cascade concept São Francisco River