Lotic ecosystems of Serra do Cipó, southeast Brazil: water quality and a tentative classification based on the benthic macroinvertebrate community

N Galdean
2000 Aquatic Ecosystem Health & Management  
A general characterization of the water quality of representative rivers of Serra do Cipo Â, State of Minas Gerais, Brazil is provided as well as the composition and distribution of benthic macroinvertebrates, mainly Plecoptera, Ephemeroptera, Trichoptera and Diptera (Chironomidae). These data are used as a basis to propose a river classi®cation for the area, comprising three major categories: undisturbed waters (Class 1), with no evidence of human in¯uences and showing high taxa richness;
more » ... taxa richness; waters with intermediate disturbances (Class 2) , showing some degree of change in the quality of their trophic resources, due mainly to the in¯uence of human activities (e.g., deforestation, sewage discharges); and disturbed waters (Class 3), showing evidence of eutrophication, although still preserving some diversity of benthic organisms. This proposed classi®cation system, although broad and simple, is believed to provide the necessary basic scienti®c information to allow for de®nition of conservation policies in the area, thus contributing to the preservation of rivers and their associated biota. q
doi:10.1016/s1463-4988(00)00044-0 fatcat:uhr4735nenayxefu4xqf57jauq