Contrasting responses of β-diversity and functional composition of aquatic insect communities across local to regional scales in Neotropical streams

Supplementary Material from the original research article entitled: “Contrasting responses of β-diversity and functional composition of aquatic insect communities across local to regional scales in Neotropical streams”. Authors: Gilberto Nicacio, Erlane José Cunha, Neusa Hamada and Leandro Juen This article is a preprint and has not been certified by peer review available at https://doi.org/10.1101/2020.09.14.297077 ARTICLE INFORMATION In this manuscript, we tested variation in community composition of Ephemeroptera, Trichoptera, and Plecoptera between regions with distinct ecological gradients known as Amazonian interfluves. We calculated beta diversity by computing Sorensen dissimilarities and evaluated environmental factors interact to structure taxonomical and functional composition in streams. Thus, we addressed discussion about effects of habitat structure and geographical distances considered as the main determinants for driving species diversity and distribution. Then, our results provide empirical support for patterns of beta diversity and functional composition of aquatic insect assemblages between regional contexts. In summary, species replacement generated most of community dissimilarities and were associated with geographical distances and environmental variation.