Importance of environmental factors for the richness and distribution of benthic macroinvertebrates in tropical headwater streams

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dc.creatorFerreira, Wander Ribeiro
dc.creatorSantos, Raphael Ligeiro Barroso
dc.creatorMacedo, Diego Rodrigues
dc.creatorHughes, Robert M.
dc.creatorKaufmann, Philip R.
dc.creatorOliveira, Leandro Gonçalves
dc.creatorPereira, Marcos Callisto de Faria
dc.date.accessioned2018-04-04T12:05:26Z
dc.date.available2018-04-04T12:05:26Z
dc.date.issued2014-05
dc.description.resumoAn 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.pt_BR
dc.identifier.citationFERREIRA, 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.pt_BR
dc.identifier.doi10.1086/676951
dc.identifier.issn2161-9549
dc.identifier.issne- 2161-9565
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/14312
dc.language.isoengpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentInstituto de Ciências Biológicas - ICB (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectEPT assemblagespt_BR
dc.subjectPhysical habitatpt_BR
dc.subjectHydromorphologypt_BR
dc.subjectStream conservationpt_BR
dc.subjectMacroinvertebrate bioindicatorspt_BR
dc.subjectCerrado headwater streamspt_BR
dc.titleImportance of environmental factors for the richness and distribution of benthic macroinvertebrates in tropical headwater streamspt_BR
dc.typeArtigopt_BR

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