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Evaluation of sediment toxicity in different Portuguese estuaries: ecological impact of metals and polycyclic aromatic hydrocarbons

2013Journal article Restricted access
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dc.contributor.authorSerafim, M.A.
dc.contributor.authorCompany, Rui
dc.contributor.authorLopes, Belisandra
dc.contributor.authorPereira, Catarina
dc.contributor.authorCravo, Alexandra
dc.contributor.authorFonseca, V. F.
dc.contributor.authorFrança, S.
dc.contributor.authorBebianno, Maria João
dc.contributor.authorCabral, H. N.
dc.date.accessioned2020-04-24T11:53:41Z
dc.date.available2020-04-24T11:53:41Z
dc.date.issued2013
dc.description.abstractEstuaries are exposed to multiple sources of different pollutants which tend to be trapped in sediments. Estuarine sediments can become reservoirs of contaminants that under certain circumstances may be released back to the water column, increasing their availability to the biota. Therefore, assessing sediment quality, of which toxicity testing is one of the lines-of-evidence, is a key element in ecological risk assessment strategies for these ecosystems. The use of Vibrio fischeri as luminescence bacteria is particularly effective in evaluating contaminated sediment. In this study, the ecotoxicity of sediments from five Portuguese estuaries (Aveiro, Tejo, Sado, Mira and Guadiana), was evaluated with a bioassay considering the 50% bioluminescence reduction of V. fischeri bacterium (EC50). Also, the levels of metals and polycyclic aromatic hydrocarbon contaminants (PAHs) were determined in the same sites. Moreover the Sediment Quality Guideline Quotient index (SQG-Q) was assessed for all sediments. The EC50 values varied significantly between estuaries but were strongly correlated with the metal concentrations in the different sites. In general Tejo estuary show higher toxicity levels compared to the other estuaries (5-min EC50 values of 5.6 mg mL(-1)). The integration of sediment contamination data shows that regarding the metallic contamination all sites are moderately impacted, with a higher SQG-Q in the Tejo estuary. On the other hand, when this index is applied to the PAHs levels, all sites are considered unimpacted. This suggests that metal contaminants are the most significant cause of toxicity in these sediments. Nevertheless, other factors can be relevant for this outcome due to the geochemical complexity of estuarine sediments (which affects contaminant speciation and bioavailability) and probably the presence of multiple xenobiotics in these sediments. (c) 2013 Elsevier Ltd. All rights reserved.pt_PT
dc.description.sponsorshipPESt-OE/MAR/UI0199/2011pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doihttps://doi.org/10.1016/j.ecss.2013.04.018pt_PT
dc.identifier.issn0272-7714
dc.identifier.urihttp://hdl.handle.net/10400.1/13778
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationSpatial and temporal variablity of fish assemblages in different estuarine habitats: dependence, adaptive plasticity and resilience (FISHEST)
dc.relationDYNAMIC MODELLING OF ESTUARINE FISH POPULATIONS: AN EVALUATION OF DIFFERENT APPROACHES TO MODEL SPECIES FUNCTIONAL TRAITS AT A MULTIPLE SCALES
dc.relationStrategic Project - UI 199 - 2011-2012
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0272771413002047?via%3Dihubpt_PT
dc.subjectSediment qualitypt_PT
dc.subjectContaminant effectspt_PT
dc.subjectMetalspt_PT
dc.subjectPolycyclic aromatic hydrocarbonspt_PT
dc.subjectMicrotoxpt_PT
dc.subjectEstuariespt_PT
dc.titleEvaluation of sediment toxicity in different Portuguese estuaries: ecological impact of metals and polycyclic aromatic hydrocarbonspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSpatial and temporal variablity of fish assemblages in different estuarine habitats: dependence, adaptive plasticity and resilience (FISHEST)
oaire.awardTitleDYNAMIC MODELLING OF ESTUARINE FISH POPULATIONS: AN EVALUATION OF DIFFERENT APPROACHES TO MODEL SPECIES FUNCTIONAL TRAITS AT A MULTIPLE SCALES
oaire.awardTitleStrategic Project - UI 199 - 2011-2012
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F64982%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F73360%2F2010/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F80043%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FMAR%2FUI0199%2F2011/PT
oaire.citation.endPage41pt_PT
oaire.citation.startPage30pt_PT
oaire.citation.titleEstuarine, Coastal and Shelf Sciencept_PT
oaire.citation.volume130pt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStreamSFRH
oaire.fundingStream6817 - DCRRNI ID
person.familyNamePereira Serafim
person.familyNameLopes
person.familyNameGuerreiro Pereira
person.familyNameCravo
person.familyNameBebianno
person.givenNameMaria Angela
person.givenNameBelisandra
person.givenNameCatarina Alexandra
person.givenNameAlexandra
person.givenNameMaria
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person.identifier.orcid0000-0003-1492-8566
person.identifier.scopus-author-id23985890600
person.identifier.scopus-author-id7004152715
project.funder.identifierhttp://doi.org/10.13039/501100001871
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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
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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