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Importance of local and landscape variables on multiple facets of stream fish biodiversity in a Neotropical agroecosystem.
- Source :
-
Hydrobiologia . Nov2022, Vol. 849 Issue 20, p4447-4464. 18p. 1 Diagram, 1 Chart, 1 Map. - Publication Year :
- 2022
-
Abstract
- 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 α-diversity of stream fish assemblages, we sampled 85 streams in the Upper Paraná 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 α-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). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00188158
- Volume :
- 849
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Hydrobiologia
- Publication Type :
- Academic Journal
- Accession number :
- 160028524
- Full Text :
- https://doi.org/10.1007/s10750-020-04396-7