Trait-based metrics as bioindicators: Responses of stream fish assemblages to a gradient of environmental degradation

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dc.contributor.authorTeresa, Fabricio Barreto [UNESP]
dc.contributor.authorCasatti, Lilian [UNESP]
dc.contributor.institutionUniv Estadual Goias
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T17:24:20Z
dc.date.available2018-11-26T17:24:20Z
dc.date.issued2017-04-01
dc.description.abstractThe development of biomonitoring tools is increasingly appealing in light of the increasing degradation of aquatic ecosystems. In this context, we investigated the responses of stream fish communities to the gradient of environmental degradation in different basins using a variety of indices based on functional diversity, functional composition, and taxonomic diversity. We used datasets from three Brazilian ecoregions. In order to describe the gradient of environmental degradation we scored streams based on local and landscape variables. The functional structure of the assemblages was described in relation to seven functional traits related to habitat use, swimming capacity, and maneuverability. We described assemblages in each ecoregion separately in relation to 20 potential indicators, grouped in four families: indices of functional diversity based on presence/absence (FDp/a); indices of functional diversity weighted by abundance (FDabund); indices of functional composition (mT); and, indices based on taxonomic diversity (TDiv). The relationship between the indicators and the gradient of environmental degradation were evaluated using linear regression. We found a significant interaction effect (ANOVA, p = 0.006) between group of indices and ecoregions for the performance of indicators, suggesting a context -dependent response. The indices, on an individual basis, had variable performance and consistency among ecoregions. Four mT indicators demonstrated the highest average performance and consistency. Taxonomic diversity indicators consistently had the lowest average performance, while FDp/a and FDabund indicators had low average performance and variable inter-regional consistency. The differential inter-regional performance of indicators was due to the differences in the lengths of the gradients of environmental degradation. Our results indicate that functional traits have greater predictive power compared to taxonomic indicators for fish responses to a gradient of environmental degradation. Although indicators of functional composition are the most promising, we emphasize that caution is needed when generalizing functional diversity indicators across ecoregions because most of them are context-dependent. (C) 2016 Published by Elsevier Ltd.en
dc.description.affiliationUniv Estadual Goias, Campus Ciencias Exatas & Tecnol, BR-75132903 Anapolis, Go, Brazil
dc.description.affiliationUniv Estadual Paulista, UNESP, Lab Ictiol, IBILCE,Dept Zool & Bot, Rua Cristavao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Lab Ictiol, IBILCE,Dept Zool & Bot, Rua Cristavao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFAPEG
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipSao Paulo State University
dc.description.sponsorshipIdCNPq: 482185/2012-0
dc.description.sponsorshipIdCNPq: 302158/2015
dc.description.sponsorshipIdCNPq: 4301755/2013-2
dc.description.sponsorshipIdFAPEG: 201210267000703
dc.description.sponsorshipIdFAPEG: AUXPE2036/2013
dc.description.sponsorshipIdFAPESP: 2001/13340-7
dc.description.sponsorshipIdFAPESP: 2010/17494-8
dc.description.sponsorshipIdSao Paulo State University: PROPE/UNESP 925
dc.format.extent249-258
dc.identifierhttp://dx.doi.org/10.1016/j.ecolind.2016.12.061
dc.identifier.citationEcological Indicators. Amsterdam: Elsevier Science Bv, v. 75, p. 249-258, 2017.
dc.identifier.doi10.1016/j.ecolind.2016.12.061
dc.identifier.fileWOS000398334600027.pdf
dc.identifier.issn1470-160X
dc.identifier.lattes8041011456158217
dc.identifier.urihttp://hdl.handle.net/11449/162656
dc.identifier.wosWOS:000398334600027
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofEcological Indicators
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectBioindicators
dc.subjectContext-dependent
dc.subjectFunctional diversity
dc.subjectTrait-based metrics
dc.titleTrait-based metrics as bioindicators: Responses of stream fish assemblages to a gradient of environmental degradationen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes8041011456158217

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Artigos - Zoologia e Botânica - IBILCE