Do river basins influence the composition of functional traits of fish assemblages in Neotropical reservoirs?

Abstract In aquatic environments, dams are considered one of the main threats to fish species, acting as an environmental filter for certain functional traits. Although there is some predictability in composition traits reservoirs, it hypothesized that filters imposed by evolutionary processes, linked characteristics basins, determinant reservoirs. For this we performed a PCoA using matrix We used PERMANOVA test difference between basins. same process species compare patterns. study, were taxonomic and differences among reservoirs inserted different It was observed basin determining factor structure assemblage When compared, structures follow pattern, although functionally reservoir tends be more similar. These results reinforce idea act (e.g., related with reproduction, feeding habitat use), great influence processes basin’s origin ichthyofaunistic province.