Grass-dominated stream sites exhibit low fish species diversity and dominance by guppies: an assessment of two tropical pasture river basins

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dc.contributor.authorCasatti, Lilian [UNESP]
dc.contributor.authorFerreira, Cristiane de Paula [UNESP]
dc.contributor.authorCarvalho, Fernando Rogerio
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Rio Grande do Sul (UFRGS)
dc.date.accessioned2014-05-20T14:03:44Z
dc.date.available2014-05-20T14:03:44Z
dc.date.issued2009-10-01
dc.description.abstractThis study investigates whether (1) structural configuration (considering substrate composition, wood debris, marginal and riparian vegetation) of streams suggests habitat simplification on a basin scale and (2) fish assemblage structure follows stream habitat configurations. Ninety-five sites in two pasture basins in southeastern Brazil were randomly selected. Two passes of electro-fishing were done in a 75-m reach at each site. Ten habitat descriptors related to in-stream and riparian physical structures were evaluated at each stream reach. Two groups of streams were identified by principal component analysis: a grassy and a non-grassy group. In comparison to non-grassy sites, grass-dominated streams exhibited a more homogenous fish fauna due to lower species diversity and higher dominance, especially by the guppy Poecilia reticulata, a highly generalist exotic species. The grassy group had not only the most simplified habitat but also the most simplified fish fauna, and the combination of grass-dominated, completely deforested, heavily silted conditions with recent land use conversion may cause a future habitat homogenization followed by a fish fauna homogenization on a regional scale.en
dc.description.affiliationUNESP Univ Estadual Paulista, IBILCE, Lab Ictiol, Dept Bot & Zool, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationUniversidade Federal do Rio Grande do Sul (UFRGS), Lab Ictiol, Dept Zool, BR-91501970 Porto Alegre, RS, Brazil
dc.description.affiliationUniversidade Federal do Rio Grande do Sul (UFRGS), Programa Posgrad Biol Anim, Inst Biociencias, BR-91501970 Porto Alegre, RS, Brazil
dc.description.affiliationUnespUNESP Univ Estadual Paulista, IBILCE, Lab Ictiol, Dept Bot & Zool, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent273-283
dc.identifierhttp://dx.doi.org/10.1007/s10750-009-9849-y
dc.identifier.citationHydrobiologia. Dordrecht: Springer, v. 632, n. 1, p. 273-283, 2009.
dc.identifier.doi10.1007/s10750-009-9849-y
dc.identifier.issn0018-8158
dc.identifier.lattes8041011456158217
dc.identifier.urihttp://hdl.handle.net/11449/22416
dc.identifier.wosWOS:000268728500019
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofHydrobiologia
dc.relation.ispartofjcr2.165
dc.relation.ispartofsjr0,896
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectHabitat structureen
dc.subjectSimplificationen
dc.subjectRiparian vegetationen
dc.subjectNon-native speciesen
dc.subjectPoecilia reticulataen
dc.titleGrass-dominated stream sites exhibit low fish species diversity and dominance by guppies: an assessment of two tropical pasture river basinsen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes8041011456158217
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

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Artigos - Zoologia e Botânica - IBILCE