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Assessing heavy metal contamination in Sado Estuary

2005Journal article Restricted access
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datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
datacite.subject.sdg14:Proteger a Vida Marinha
dc.contributor.authorCaeiro, Sandra
dc.contributor.authorCosta, Maria Helena
dc.contributor.authorRamos, Tomás B.
dc.contributor.authorFernandes, F.
dc.contributor.authorSilveira, N.
dc.contributor.authorCoimbra, Ana Paula
dc.contributor.authorMedeiros, G.
dc.contributor.authorPainho, Marco
dc.date.accessioned2011-12-19T13:37:05Z
dc.date.available2011-12-19T13:37:05Z
dc.date.issued2005
dc.description.abstractThe Sado Estuary in Portugal is a good example of a site where human pressures and ecological values collide with each other. An overall contamination assessment has never been conducted in a way that is comprehensible to estuary managers. One of the aims of this work was to select different types of index to aggregate and assess heavy metal contamination in the Sado Estuary in an accessible manner. Another aim was to use interpolation surfaces per metal to compare and gauge the results of the indices and to assess the contamination separately per metal. Seventy-eight stations were sampled within the main bay of the estuary and a set of heavy metals and metalloids was established, Cd, Cu, Pb, Cr, Hg, Al, Zn and As. The sediment fine fraction content, organic matter and redox potential were also analysed. Various indices for contamination, background enrichment and ecological risk were used, tested, compared and performance-evaluated. All metals and metalloids were strongly correlated, and the indices appear to reflect heavy metal variability satisfactorily. Difficulties were found in some indices regarding boundary definition (minimum and maximum) and comparability with other estuaries, thus better methods of standardization should be a priority issue. According to the index that has the highest performance score within the group of ecological risk indices – the Sediment Quality Guideline Quotient – only 3% of the stations are highly contaminated and register a high potential for observing adverse biological effects, whereas 47% display moderate contamination. This index can be complemented with the contamination index, which allows more site-specific and accurate information on contaminant levels. If the aim of work on contamination evaluation is to assess the overall contamination of a study area, the indices are highly appropriate. For spatial and source evaluation per metal, interpolation surfaces should also be used.por
dc.identifier.issn1470-160X
dc.identifier.urihttp://hdl.handle.net/10400.2/2003
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relation.publisherversiondoi:10.1016/j.ecolind.2005.02.001
dc.subjectIndicators and indicespor
dc.subjectmetal assessmentpor
dc.subjectSedimentpor
dc.subjectEstuarine managementpor
dc.subjectPollutionpor
dc.titleAssessing heavy metal contamination in Sado Estuarypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage19por
oaire.citation.startPage1por
oaire.citation.titleEcological indicatorspor
person.familyNameCaeiro
person.familyNameBarros Ramos
person.familyNamePainho
person.givenNameSandra
person.givenNameTomás Augusto
person.givenNameMarco
person.identifier587808
person.identifier.ciencia-id8515-398A-D241
person.identifier.ciencia-id251B-81E7-394B
person.identifier.orcid 0000-0002-6079-3554
person.identifier.orcid0000-0002-8270-4022
person.identifier.orcid0000-0003-1136-3387
person.identifier.ridK-3886-2014
person.identifier.ridD-1884-2010
person.identifier.scopus-author-id6603297853
person.identifier.scopus-author-id55893968400
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicatione2a8250a-8f09-4f11-a04e-1a3056644ff3
relation.isAuthorOfPublicationd99d2e28-00fc-4823-bff1-69bfe4a75ff1
relation.isAuthorOfPublication632bd61d-5116-4210-ad1a-a89f671e6eef
relation.isAuthorOfPublication.latestForDiscovery632bd61d-5116-4210-ad1a-a89f671e6eef

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