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Benthic foraminifera and pore water carbonate chemistry on a tidal flat and salt marsh at Ria Formosa, Algarve, Portugal

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dc.contributor.authorSchönfeld, Joachim
dc.contributor.authorMendes, Isabel
dc.date.accessioned2023-01-11T15:40:37Z
dc.date.available2023-01-11T15:40:37Z
dc.date.issued2022
dc.description.abstractBenthic foraminifera showed a vertical zonation in tidally influenced salt marshes, which has been used for sea level reconstructions. Growing evidence suggested that freshwater influx, salinity, or the pH of interstitial waters has also an impact on the foraminiferal distribution. A tidal flat and salt marsh transect was investigated in the north-western Ria Formosa coastal lagoon, Algarve, Portugal, to constrain the relationship of benthic foraminifera, halophytes, and pore water properties. The dominance of saltworts from the subfamily Salicornioideae and landward increasing soil salinities depicted evaporation as governing environmental factor. The carbonate chemistry from lagoonal and pore waters identified anoxic tidal flat sediments of as main source of total alkalinity. The alkalinity was lower in the salt marsh, where the pCO(2) was extremely high. Salt marsh pore waters showed a high variability of carbonate system parameters, which mirrored small-scale spatial heterogeneities in the soil. The distribution of textulariid salt marsh foraminifera was confined to the vegetated zones, where their abundance increased with elevation. Calcareous species were frequent on the tidal flat and in the highest salt marsh. Many of them were specialised to high salinities or to extreme and variable environmental conditions. Two levels of faunal change in the salt marsh coincide with vegetation zonal boundaries, mean tide or mean high water levels. The two other faunal changes were related to changes in calcite saturation state or organic carbon concentrations. The proportion of textulariids showed a negative correlation with submergence time or eleva-tion, and a significant correlation with pore water pCO(2). The faunal distribution, pore water calcite saturation, and Ammonia dissolution patterns indicated that calcareous species specialised to tolerate carbonate-corrosive conditions prevailed even at lowest saturation levels.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.ecss.2022.108003pt_PT
dc.identifier.eissn0272-7714
dc.identifier.urihttp://hdl.handle.net/10400.1/18801
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationNot Available
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.subjectRia formosapt_PT
dc.subjectIntertidalpt_PT
dc.subjectSalt marshpt_PT
dc.subjectForaminiferapt_PT
dc.subjectSalinitypt_PT
dc.subjectCarbonate chemistrypt_PT
dc.titleBenthic foraminifera and pore water carbonate chemistry on a tidal flat and salt marsh at Ria Formosa, Algarve, Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNot Available
oaire.awardTitleCentre for Marine and Environmental Research (CIMA)
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/DL 57%2F2016/DL57%2F2016%2FCP1334%2FCP1644%2FCT0001/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00350%2F2020/PT
oaire.citation.startPage108003pt_PT
oaire.citation.titleEstuarine, Coastal and Shelf Sciencept_PT
oaire.citation.volume276pt_PT
oaire.fundingStreamDL 57/2016
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMendes
person.givenNameIsabel Maria de Paiva Pinto
person.identifier.ciencia-id5C15-242C-FDC0
person.identifier.orcid0000-0001-7004-7910
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.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationc34b90c6-5a34-472c-a658-1d2329a59936
relation.isAuthorOfPublication.latestForDiscoveryc34b90c6-5a34-472c-a658-1d2329a59936
relation.isProjectOfPublication3d386922-143c-46a1-967e-a7e02b2c13b3
relation.isProjectOfPublication607b395b-b4ff-4b27-b6e4-779cdea78d97
relation.isProjectOfPublication.latestForDiscovery607b395b-b4ff-4b27-b6e4-779cdea78d97

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