Data/hora: 02/06/2024 04:48:53

Provedor de dados: 	83	
País: 	Brazil	
Título: 	Effects of extended absence of flooding on the fish assemblages of three floodplain lagoons in the middle São Francisco River, Brazil	
Autores: 	Pompeu,Paulo dos Santos; Godinho,Hugo Pereira.	
Data: 	2006-12-01	
Ano: 	2006	
Palavras-chave: 	Floodplain; Migratory fish; Extended drought; Hypoxia.	
Resumo: 	In the Neotropics, a large proportion of fish communities of large rivers use floodplain as habitats for feeding, reproduction, and refuge. An evaluation was made of the effects of extended dry periods on the species richness, abundance and local extinction of fish species in three marginal lagoons in the middle São Francisco River, southeastern Brazil. The studied lagoons fail to receive river floods during the study period (1994-1996). A gradual reduction in richness and abundance was observed in all lagoons. Migratory fish species had the highest probability to become extinct in the two lagoons that remained with large water volume. Species tolerant to low levels of dissolved oxygen had the lowest probability of local extinction in the lagoon showing an abrupt reduction in water volume. Similar changes to those observed in the current study are likely to occur in the floodplains if dams would be constructed in this segment of the river. Adequate water releases from Três Marias reservoir, located upstream, should be considered as a management tool for producing episodic flooding on the marginal lagoons of the region.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000400006	
Editor: 	Sociedade Brasileira de Ictiologia	
Relação: 	10.1590/S1679-62252006000400006	
Formato: 	text/html	
Fonte: 	Neotropical Ichthyology  v.4 n.4 2006	
Fonte: 	info:eu-repo/semantics/openAccess