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Paleoenvironmental evolution of the Guadiana Estuary, Portugal, during the Holocene: a modern foraminifera analog approach

2016-07Journal article Restricted access
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dc.contributor.authorCamacho, Sarita
dc.contributor.authorBoski, T.
dc.contributor.authorMoura, Delminda
dc.contributor.authorScott, David
dc.contributor.authorConnor, Simon
dc.contributor.authorPereira, Laura
dc.date.accessioned2020-10-22T14:18:05Z
dc.date.available2020-10-22T14:18:05Z
dc.date.issued2016-07
dc.date.updated2020-10-21T14:21:27Z
dc.description.abstractIn this paper, we reconstruct the Holocene paleoenvironmental evolution of the Guadiana Estuary, southwestern Iberian Peninsula. Two previously studied boreholes (CM3 and CM5) were revisited and analyzed in the light of a foraminifera modern analog approach. Cluster analyses define four assemblages with different biocenotic, taphonomic, elevation and distance-to-sea settings, which serve as a baseline for paleoassemblages interpretation. Faunal changes along the sedimentary sequences, together with previous sedimentological and chronological data, redefine the different phases of environmental evolution in the Guadiana Estuary since ca. 13 kyr cal. BP, with special emphasis on the Holocene marine highstand. Estuarine flooding began synchronously in both locations (ca. 9 kyr cal. BP) but manifested differently in each sedimentary sequence. The most seaward borehole records a more evident and longer highstand (ca. 8.8–3.8 kyr cal. BP), characterized by the occurrence of subtidal environments and by the presence of open marine species (Pararotalia cf. spinigera, planktic forms and a significant number of exotic/allochthonous tests), indicating warmer and more marine conditions than today. In the most landward borehole, the highstand is shorter (ca. 8–7.6 kyr cal. BP) and less intense, characterized by the presence of a diverse, mainly autochthonous, open estuary assemblage, dominated by Ammonia aberdoveyensis and Haynesina germanica. At 4.4 kyr cal. BP, during a long deceleration phase of regional sea-level rise, a short but well-defined pulse of marine influence is recorded in CM5, when open estuarine assemblages reappear and replace marsh agglutinated assemblages, suggesting a new submergence phase. This short event is not identified in the previous works carried out in the same area, thus further data are needed to understand whether it is consequent from a global, warming period or whether it resulted only from local and ephemeral forcing effects.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doihttp://dx.doi.org/10.1177/0959683616658526pt_PT
dc.identifier.slugcv-prod-2036319
dc.identifier.urihttp://hdl.handle.net/10400.1/14798
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSagept_PT
dc.relationMODELO DE ZONAÇÃO ECOLÓGICA DOS FORAMINÍFEROS BENTÓNICOS E TECAMEBAS DO ESTUÁRIO DO RIO GUADIANA E SUA APLICAÇÃO NA RECONSTRUÇÃO PALEOAMBIENTAL
dc.subjectForaminiferapt_PT
dc.subjectPararotalia cf. spinigerapt_PT
dc.subjectHolocenept_PT
dc.subjectMSL risept_PT
dc.subjectGuadiana estuarypt_PT
dc.subjectModern analogspt_PT
dc.titlePaleoenvironmental evolution of the Guadiana Estuary, Portugal, during the Holocene: a modern foraminifera analog approachpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMODELO DE ZONAÇÃO ECOLÓGICA DOS FORAMINÍFEROS BENTÓNICOS E TECAMEBAS DO ESTUÁRIO DO RIO GUADIANA E SUA APLICAÇÃO NA RECONSTRUÇÃO PALEOAMBIENTAL
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F28265%2F2006/PT
oaire.citation.endPage235pt_PT
oaire.citation.issue27pt_PT
oaire.citation.startPage197pt_PT
oaire.citation.titleThe Holocenept_PT
oaire.citation.volume27pt_PT
person.familyNameCamacho
person.familyNameBoski
person.familyNameMoura
person.familyNameConnor
person.familyNamePereira
person.givenNameSarita
person.givenNameTomasz
person.givenNameDelminda
person.givenNameSimon
person.givenNameLaura
person.identifier1096134
person.identifier.ciencia-id9B1A-D006-F736
person.identifier.ciencia-id1416-B317-51D1
person.identifier.ciencia-id171B-8713-654E
person.identifier.orcid0000-0002-2986-7156
person.identifier.orcid0000-0003-2462-4179
person.identifier.orcid0000-0002-0952-6805
person.identifier.orcid0000-0001-5685-2390
person.identifier.orcid0000-0003-1977-798X
person.identifier.ridE-9559-2015
person.identifier.scopus-author-id6602267486
person.identifier.scopus-author-id15048413000
person.identifier.scopus-author-id7102766997
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaid9B1A-D006-F736 | Sarita Camacho da Encarnação
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublicationa857b0c7-90ab-473b-a62e-e92b452e604d
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