Influence of Habitat and Land Use on the Assemblages of Ephemeroptera, Plecoptera, and Trichoptera in Neotropical Streams

摘要: Insects of the orders Ephemeroptera, Plecoptera, and Trichoptera (EPT) are often used to assess conditions aquatic environments, but few studies have examined differences in these communities between riffles pools. Our objective was test whether shelter greater richness abundance EPT, as well sensitivity insects for detecting impacts from different land uses streams southeastern Brazil. Samples were collected dry season 2012 with a Surber sampler pools nine (forest, pasture, urban areas). Principal component analysis distinguished according function percentage plant cover water oxygenation level showed partial distinction current speed ultrafine sand. Detrended correspondence indicated EPT composition pools, except streams. The results this study confirm expected fauna structure especially forest pasture environments. individual metrics riffle pool assemblages significantly responses use. Therefore, we suggest sampling since assemblages’ can differ habitats influence assessments low-order