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By: Peres, Cleto Kaveski - Branco, Ciro Cesar Zanini - Krupek, Rogério Antonio - Rocha, José CelsoType: ArticleIn: Acta Limnologica BrasiliensiaVolume:Series:Issue:Date: 2010-06-01Page Range:Publication Info:Subjects: anthropic impact Brazil environmental assessment local-scale variation