| Texto completo | |
| Autor(es): |
Roa-Fuentes, Camilo A.
;
Heino, Jani
;
Zeni, Jaquelini O.
;
Ferraz, Silvio
;
Cianciaruso, Marcus V.
;
Casatti, Lilian
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Hydrobiologia; v. 849, n. 20, p. 18-pg., 2020-09-08. |
| Resumo | |
Few studies have considered the effects of environmental variables at different spatial scales on Neotropical stream biodiversity. Furthermore, scale-related studies mostly include only one facet of biodiversity. To determine the contribution of local and landscape variables to the variation in the taxonomic, functional and phylogenetic alpha-diversity of stream fish assemblages, we sampled 85 streams in the Upper Parana River basin, Brazil. Local variables explained a substantial fraction of the variance in almost all biodiversity facets. Landscape variables (i.e., land-use and spatial variables) contributed little to the variation in the alpha-component of biodiversity. Our results thus highlight the importance of local features for maintaining stream fish biodiversity in agroecosystems. Probably, land-use were not significant because the study area was in a relatively homogeneous landscape severely impacted by anthropogenic activities. It is possible that insignificant effects of spatial structuring occurred because the ichthyofauna has already gone through a homogenization process and/or due to the spatial scale of our study. We suggest that even though local-scale restoration actions would influence biodiversity, we should not neglect landscape restoration because substantial improvements in the ecological integrity of streams are more likely to be accomplished with large-scale actions (e.g., re-establishment of the native riparian forest). (AU) | |
| Processo FAPESP: | 12/05983-0 - Diversidade taxonômica e funcional da ictiofauna de riachos em diferentes agrossistemas no Estado de São Paulo |
| Beneficiário: | Lilian Casatti |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/06033-1 - O papel dos fatores atuais e históricos nos padrões de diversidade beta de peixes em riachos de agroecossistemas |
| Beneficiário: | Jaquelini de Oliveira Zeni |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |