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How functional traits of estuarine macrobenthic assemblages respond to metal contamination?

2016-12Journal article Restricted
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dc.contributor.authorPiló, David
dc.contributor.authorBen-Hamadou, Radhouan
dc.contributor.authorPereira, F.
dc.contributor.authorCarrico, A.
dc.contributor.authorPereira, P.
dc.contributor.authorCorzo, A.
dc.contributor.authorGaspar, Miguel
dc.contributor.authorCarvalho, S.
dc.date.accessioned2017-04-07T15:55:42Z
dc.date.available2017-04-07T15:55:42Z
dc.date.issued2016-12
dc.description.abstractThe effects of metal contamination on estuarine macrobenthic communities were investigated using the Biological Traits Analysis (BTA). The study was carried out in the Tagus estuary (western Portugal). Samples of macrobenthic communities and associated environmental variables were taken in four surveys (September 2012, and February, May and October 2013) across the contamination gradient from three main zones: a slightly contaminated, a moderately contaminated and a highly contaminated zone. Functional traits for the most abundant species were assigned using seven categories based on "Feeding mode", "Life span", "Body size", "Motility", "Position in sediments", "Larval type" and "AMBI ecological group". To investigate whether the macroinvertebrate community structure was associated with the environmental parameters and biological traits an integrative multivariate analysis, combining the RLQ analysis and the fourth-corner method, was applied. Within this analysis, human-induced estuarine variables (metals) were rendered independent from natural ones (sediment fine particles) through partial correlations. Following this approach, it was possible to decouple the effects of two typically highly correlated environmental descriptors with different origins. Overall, the study identified significant relationships between sediment environmental descriptors and the functional traits of macrobenthic communities. Further, RLQ/Fourth-corner combined analysis successfully isolated the traits and corresponding species that were most correlated with the measured concentration of trace metals in sediments, supporting the knowledge that benthic organisms exhibit distinct responses to different levels of disturbance. A shift in species dominance occurred along the contamination gradient with epifaunal tolerant species with very small size, long life span, and crawling motility dominating the highest contaminated area. This area was also related with surface deposit-feeder species. The most representative species associated with this area was the gastropod Peringia ulvae. Less contaminated sites revealed large-sized specimens, carnivores and swimmers, mainly represented by the polychaete Nephtys hombergii. This finding is consistent with other studies addressing different kinds of disturbance, where a shift in dominance from carnivore/predators, long-lived and large animals to the predominance of small-size, short-lived and deposit-feeders has been observed across increasing gradients of disturbance. Our results reinforce the importance of macrobenthic functional traits analysis to assess human disturbances driven impacts in multi-stressed estuarine ecosystems. By analysing the environmental variables with different origins independently, we were able to draw conclusions about the effects of human pressures (metals) on macrobenthic traits. Such distinction can be particularly useful to isolate different environmental descriptors and assess their effects on functional diversity, making the current approach promising in evaluation the ecological effects of anthropogenic stressors in estuarine areas. (C) 2016 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.ecolind.2016.07.019
dc.identifier.issn1470-160X
dc.identifier.urihttp://hdl.handle.net/10400.1/9194
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationBRIDGING THE GAP BETWEEN METAL CONTAMINATION AND ECOLOGICALLY SIGNIFICANT EFFECTS ON MACROBENTHIC COMMUNITIES: A MULTIDISCIPLINARY APPROACH FROM GENE TO COMMUNITY - ECOAPPROACH
dc.relation.isbasedonWOS:000388157900065
dc.titleHow functional traits of estuarine macrobenthic assemblages respond to metal contamination?
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleBRIDGING THE GAP BETWEEN METAL CONTAMINATION AND ECOLOGICALLY SIGNIFICANT EFFECTS ON MACROBENTHIC COMMUNITIES: A MULTIDISCIPLINARY APPROACH FROM GENE TO COMMUNITY - ECOAPPROACH
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FAAC-AMB%2F121037%2F2010/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F69563%2F2010/PT
oaire.citation.endPage659
oaire.citation.startPage645
oaire.citation.titleEcological Indicators
oaire.citation.volume71
oaire.fundingStream3599-PPCDT
oaire.fundingStreamSFRH
person.familyNamePiló
person.familyNameBen-Hamadou
person.familyNameGaspar
person.givenNameDavid
person.givenNameRadhouan
person.givenNameMiguel
person.identifier.ciencia-id291E-1F70-F443
person.identifier.ciencia-idF719-07AC-E41F
person.identifier.orcid0000-0002-1810-7135
person.identifier.orcid0000-0003-2686-5822
person.identifier.orcid0000-0001-9245-8518
person.identifier.ridF-8192-2011
person.identifier.ridF-5398-2011
person.identifier.scopus-author-id36052051100
person.identifier.scopus-author-id15764751100
person.identifier.scopus-author-id23501123500
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
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