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Campo DC | Valor | Idioma |
---|---|---|
dc.creator | Loures, Raquel Coelho | - |
dc.creator | Pompeu, Paulo Santos | - |
dc.date.accessioned | 2019-04-09T19:16:19Z | - |
dc.date.available | 2019-04-09T19:16:19Z | - |
dc.date.issued | 2018-09-18 | - |
dc.identifier.citation | LOURES, R. C.; POMPEU, P. S. Long-term study of reservoir cascade in south-eastern Brazil reveals spatio-temporal gradient in fish assemblages. Marine and Freshwater Research, [S.l.], v. 69, n. 12, p. 1983-1994, 2018. DOI: 10.1071/MF18109. | pt_BR |
dc.identifier.uri | http://www.publish.csiro.au/MF/MF18109 | pt_BR |
dc.identifier.uri | http://repositorio.ufla.br/jspui/handle/1/33469 | - |
dc.description.abstract | In reservoir cascades, effects on fish assemblages are expected to strengthen over time and transfer from one reservoir to an adjacent one. To test this, fish-assemblage data from 23 years of monitoring in the Araguari reservoir cascade system, upper Paraná River basin, were analysed. The results showed a clear reduction in richness of native and migratory fish species and an increase of non-native species, following reservoir formation. Migratory species richness was higher in reservoirs that presented habitats similar to lotic stretches or tributaries upstream of the impounded area. There was a clear tendency for native species to decline and non-native fish species to increase, in a downstream direction. Fish assemblages became increasingly dissimilar as reservoirs became more distant from each other (longitudinal gradient) and were dominated by small and medium-sized species. Alongside longitudinal position, reservoir area, age and the presence of herbivorous non-native fish were found to be important predictors of variation in fish-assemblage structure. Results from the present study help clarify the potential accumulated impacts of reservoir cascades on fish diversity, which must be carefully considered in river-basin inventories for hydropower plants, and reinforce the importance of long-term monitoring, considering longitudinal and lateral dimensions of the basin. | pt_BR |
dc.language | en_US | pt_BR |
dc.publisher | CSIRO Publishing | pt_BR |
dc.rights | restrictAccess | pt_BR |
dc.source | Marine and Freshwater Research | pt_BR |
dc.subject | Araguari River (Brazil) | pt_BR |
dc.subject | Dam impact | pt_BR |
dc.subject | Freshwater fish | pt_BR |
dc.subject | Invasive species | pt_BR |
dc.subject | Longitudinal gradient | pt_BR |
dc.subject | Rio Araguari (Brasil) | pt_BR |
dc.title | Long-term study of reservoir cascade in south-eastern Brazil reveals spatio-temporal gradient in fish assemblages | pt_BR |
dc.type | Artigo | pt_BR |
Aparece nas coleções: | DBI - Artigos publicados em periódicos |
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