Long-term study of reservoir cascade in south-eastern Brazil reveals spatio-temporal gradient in fish assemblages

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorLoures, Raquel Coelho-
Autor(es): dc.creatorPompeu, Paulo Santos-
Data de aceite: dc.date.accessioned2026-02-09T11:43:54Z-
Data de disponibilização: dc.date.available2026-02-09T11:43:54Z-
Data de envio: dc.date.issued2019-04-09-
Data de envio: dc.date.issued2019-04-09-
Data de envio: dc.date.issued2018-09-18-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/33469-
Fonte completa do material: dc.identifierhttp://www.publish.csiro.au/MF/MF18109-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1146208-
Descrição: dc.descriptionIn 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.-
Idioma: dc.languageen-
Publicador: dc.publisherCSIRO Publishing-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceMarine and Freshwater Research-
Palavras-chave: dc.subjectAraguari River (Brazil)-
Palavras-chave: dc.subjectDam impact-
Palavras-chave: dc.subjectFreshwater fish-
Palavras-chave: dc.subjectInvasive species-
Palavras-chave: dc.subjectLongitudinal gradient-
Palavras-chave: dc.subjectRio Araguari (Brasil)-
Título: dc.titleLong-term study of reservoir cascade in south-eastern Brazil reveals spatio-temporal gradient in fish assemblages-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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