Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/14312
Tipo do documento: Artigo
Título: Importance of environmental factors for the richness and distribution of benthic macroinvertebrates in tropical headwater streams
Autor: Ferreira, Wander Ribeiro
Santos, Raphael Ligeiro Barroso
Macedo, Diego Rodrigues
Hughes, Robert M.
Kaufmann, Philip R.
Oliveira, Leandro Gonçalves
Pereira, Marcos Callisto de Faria
Resumo: An understanding of the interactions among local environmental factors (e.g., physical habitat and water quality) and aquatic assemblages is essential to conserve biodiversity in tropical and subtropical headwater streams. We evaluated the relative importance of multiple physical and chemical habitat variables that influence the richness of Ephemeroptera, Plecoptera, and Trichoptera (EPT) assemblages in wadeable Brazilian Cerrado (savanna) streams. We sampled macroinvertebrate assemblages and quantified physical and chemical habitat in 79 randomly selected sites in 2 Cerrado basins in southeastern Brazil. The environmental variables selected by multiple regression models (MLRs) via corrected Akaike Information Criteria (AICc) contributed significantly to variation in EPT taxon richness. The variance explained by physical-habitat variables was slightly greater in the Upper São Francisco Basin (adjusted R2 = 0.53) than in the Upper Araguari Basin (adjusted R2 = 0.46), and both were greater than the variance explained by a combined basin model (adjusted R2 = 0.39). Physical-habitat variables were more important than water-quality variables in structuring EPT genera in streams with catchments dominated by agriculture or pasture land uses. Regional models can be improved by incorporating basin-specific information to refine biological assessments and to provide better understanding of the interactions that maintain biodiversity in stream networks.
Palavras-chave: EPT assemblages
Physical habitat
Hydromorphology
Stream conservation
Macroinvertebrate bioindicators
Cerrado headwater streams
País: Brasil
Unidade acadêmica: Instituto de Ciências Biológicas - ICB (RG)
Citação: FERREIRA, Wander R.; LIGEIRO, Raphael; MACEDO, Diego R.; HUGHES, Robert M. Importance of environmental factors for the richness and distribution of benthic macroinvertebrates in tropical headwater streams. Freshwater Science, Chicago, v. 33, n. 3, p. 860-871, May 2014.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1086/676951
Identificador do documento: 10.1086/676951
URI: http://repositorio.bc.ufg.br/handle/ri/14312
Data de publicação: Mai-2014
Aparece nas coleções:ICB - Artigos publicados em periódicos

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