Spatial heterogeneity affecting fish fauna in cascade reservoirs of the Upper Parana Basin, Brazil

Página do item simplificado
dc.contributor.authorFerrareze, Mateus [UNESP]
dc.contributor.authorCasatti, Lilian [UNESP]
dc.contributor.authorNogueira, Marcos G. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-03-18T15:53:03Z
dc.date.available2015-03-18T15:53:03Z
dc.date.issued2014-10-01
dc.description.abstractIn cascade reservoirs, different zonation effects can be observed along the longitudinal axis, depending on the retention time of each reservoir. In this study, we evaluated the relationships among fish and spatial and environmental variables across longitudinal zones within reservoirs with different retention times. Fieldwork was carried out during two periods in three different zones that represent the longitudinal axis (lotic, transitional, and lentic) of three reservoirs. Each reservoir has different retention times (low, intermediate, and high) and all are located in a cascade system of the Paranapanema River, Brazil. In the high retention time reservoir, richness, biomass, and diversity decreased along the longitudinal axis, in contrast to the numerical abundance and dominance. Conversely, in the low retention time reservoir, these community attributes varied in an opposite way. Both spatial (depth, retention time, longitude, and latitude) and environmental (dissolved oxygen, water temperature, Secchi disk, total nitrogen) variables were important controlling factors for fish communities in reservoirs, which confirms the hypothesis that reservoir retention times create a zonation effect with different proportions along the main axis, resulting in a spatial heterogeneity with specific environmental features, and it determines the fish assemblage structure and composition in each reservoirs.en
dc.description.affiliationUNESP Sao Paulo State Univ, Dept Bot & Zool, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil
dc.description.affiliationUNESP Sao Paulo State Univ, Dept Zool, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUNESP Sao Paulo State Univ, Dept Bot & Zool, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil
dc.description.affiliationUnespUNESP Sao Paulo State Univ, Dept Zool, BR-18618000 Botucatu, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent97-109
dc.identifierhttp://dx.doi.org/10.1007/s10750-014-1922-5
dc.identifier.citationHydrobiologia. Dordrecht: Springer, v. 738, n. 1, p. 97-109, 2014.
dc.identifier.doi10.1007/s10750-014-1922-5
dc.identifier.issn0018-8158
dc.identifier.lattes8041011456158217
dc.identifier.urihttp://hdl.handle.net/11449/116311
dc.identifier.wosWOS:000340479400008
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.subjectIchthyofaunaen
dc.subjectZonationen
dc.subjectLentic ecosystemen
dc.subjectRetention timeen
dc.subjectLimnologyen
dc.titleSpatial heterogeneity affecting fish fauna in cascade reservoirs of the Upper Parana Basin, Brazilen
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, Botucatupt
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

Arquivos

Coleções

Artigos - Zoologia e Botânica - IBILCE
Artigos - Zoologia - IBB