Contrasting continental patterns and drivers of taxonomic and functional turnover among fish assemblages across Brazilia
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PERSPECTIVES ON SUSTAINABLE HYDRO-POWER
Contrasting continental patterns and drivers of taxonomic and functional turnover among fish assemblages across Brazilian reservoirs Fernando Mayer Pelicice . Luciana da Silva Damasceno . Eveline de Almeida Ferreira . Weferson Ju´nio da Grac¸a . Carlos Se´rgio Agostinho . Rodrigo Fernandes
Received: 25 February 2020 / Revised: 8 August 2020 / Accepted: 14 August 2020 Ó Springer Nature Switzerland AG 2020
Abstract In this paper, we investigated composition and trait turnover among fish assemblages in reservoirs distributed across major Brazilian basins, in order to contrast taxonomic and functional turnover and to investigate their respective drivers. We investigated the hypothesis that reservoir assemblages present, on a continental scale, divergent species compositions but with a similar set of traits. Species lists and functional traits were compiled from 79 reservoirs located in the Amazon, Sa˜o Francisco, Guest editors: Ingeborg P. Helland, Michael Power, Eduardo G. Martins & Knut Alfredsen / Perspectives on the environmental implications of sustainable hydro-power
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10750-020-04388-7) contains supplementary material, which is available to authorized users. F. M. Pelicice (&) C. S. Agostinho Nu´cleo de Estudos Ambientais, Universidade Federal de Tocantins, Rua 3, Quadra 17, Jardim dos Ipeˆs, Porto Nacional, Tocantins 77500-000, Brazil e-mail: [email protected] C. S. Agostinho e-mail: [email protected] L. da Silva Damasceno Programa de Po´s-Graduac¸a˜o em Ecologia de Eco´tonos (current Biodiversidade, Ecologia e Conservac¸a˜o), Universidade Federal do Tocantins, Porto Nacional, Tocantins, Brazil e-mail: [email protected]
Parana´ and Atlantic basins. We observed considerable variation in species and trait composition among reservoirs, with higher intra-basin similarity. Taxonomic turnover ranged between 0 and 1 (0.44 ± 0.22 SD), and functional turnover between 0 and 0.91 (0.37 ± 0.19); functional turnover correlated positively with taxonomic turnover, but showed lower values. Observed functional turnover values did not differ from null expectations, indicating lack of functional convergence. We detected significant effects of basin, longitude, latitude and elevation on turnover values, and the presence of non-native species was associated with either homogenization or differentiation patterns. Our results indicated that fish composition is heterogeneous among impoundments, providing little support to the hypothesis that reservoir assemblages are homogenized on a
L. da Silva Damasceno Escola Famı´lia Agrı´cola de Porto Nacional, EFA, Porto Nacional, Tocantins, Brazil E. de Almeida Ferreira R. Fernandes Laborato´rio de Ecologia de Comunidades e Paisagens, ´ rido, Mossoro´, Universidade Federal Rural do Semi-A Rio Grande do Norte, Brazil e-mail: [email protected] R. Fernandes e-mail: [email protected]
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