Scale-dependent patterns of fish faunal homogenization in Neotropical reservoirs
- PDF / 830,067 Bytes
- 14 Pages / 547.087 x 737.008 pts Page_size
- 9 Downloads / 216 Views
(0123456789().,-volV) ( 01234567 89().,-volV)
AQUATIC HOMOGENOCENE
Scale-dependent patterns of fish faunal homogenization in Neotropical reservoirs ´ der A. Gubiani . Pita´goras A. Piana . Vanessa S. Daga . Julian D. Olden . E Andre´ A. Padial . Jean R. S. Vitule
Received: 21 June 2019 / Revised: 26 November 2019 / Accepted: 29 November 2019 Ó Springer Nature Switzerland AG 2019
Abstract The conservation challenges facing freshwater ecosystems necessitate broadening our science from understanding individual species loss to anticipating multi-faceted changes to biodiversity. In recent decades, the process of biotic homogenization by which regional biotas become more similar through time has attracted considerable attention. Here, we (1) quantified spatial and temporal changes in taxonomic and functional similarity of fish assemblages among Neotropical reservoirs, (2) determined nonnative Guest editors: Andre´ A. Padial, Julian D. Olden & Jean R. S. Vitule / The Aquatic Homogenocene
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10750-019-04145-5) contains supplementary material, which is available to authorized users. V. S. Daga (&) J. R. S. Vitule Laborato´rio de Ecologia e Conservac¸a˜o (LEC), Departamento de Engenharia Ambiental, Setor de Tecnologia, Universidade Federal do Parana´, Curitiba, Parana´, Brazil e-mail: [email protected] J. D. Olden School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA, USA E´. A. Gubiani P. A. Piana Programa de Po´s-Graduac¸a˜o em Conservac¸a˜o e Manejo de Recursos Naturais, Universidade Estadual do Oeste do Parana´, Cascavel, Parana´, Brazil
species contributions to changes in taxonomic and functional composition, and (3) evaluated relationships between the changes in taxonomic and functional similarity among reservoirs. We did so by considering different spatial scales: inter- and intraecoregions. At inter-ecoregion scale, reservoir fish assemblages have become taxonomically homogenized over time, whereas functional trait composition has tended to differentiate. At intra-ecoregion scale, we detected both taxonomic and functional differentiation over time. Despite these overall trends, different ecoregions exhibited considerable variation in patterns of fish faunal homogenization and differentiation. We found a moderate positive relationship between changes in mean taxonomic and functional similarity among reservoirs at inter-ecoregion scale, which was no longer evident within ecoregions. In E´. A. Gubiani P. A. Piana Programa de Po´s-Graduac¸a˜o em Recursos Pesqueiros e Engenharia de Pesca, Universidade Estadual do Oeste do Parana´, Toledo, Parana´, Brazil E´. A. Gubiani P. A. Piana Grupo de Pesquisas em Recursos Pesqueiros e Limnologia (Gerpel), Universidade Estadual do Oeste do Parana´, Toledo, Parana´, Brazil A. A. Padial J. R. S. Vitule Programa de Po´s-Graduac¸a˜o em Ecologia e Conservac¸a˜o, Universidade Federal do Parana´, Curitiba, Parana´, Parana´, Brazil
123
Hydrobiologia
conc
Data Loading...
