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First assessment of blue carbon stocks, sequestration rates and potential sources since 1900 at Arguin Island (Mauritania)

2025-07-21Artigo científico Acesso aberto
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datacite.subject.sdg13:Ação Climática
datacite.subject.sdg14:Proteger a Vida Marinha
datacite.subject.sdg15:Proteger a Vida Terrestre
dc.contributor.authorMartins, Márcio
dc.contributor.authorAbrantes, Fatima
dc.contributor.authorAires, Tania
dc.contributor.authorRautenbach, Sarah
dc.contributor.authorEngelen, Aschwin
dc.contributor.authorEncarnação, João Pedro da Silva
dc.contributor.authorAbecasis, David
dc.contributor.authorGandega, Cheikhna
dc.contributor.authorMagalhães, Vitor
dc.contributor.authorBrahim, Khallahi
dc.contributor.authorEbaye, Sidina
dc.contributor.authorBarusseau, Jean-Paul
dc.contributor.authorFreiwald, André
dc.contributor.authorBarrena de los Santos, Carmen
dc.contributor.authorSerrao, Ester A.
dc.contributor.authorSantos, Rui
dc.date.accessioned2026-03-19T13:56:40Z
dc.date.available2026-03-19T13:56:40Z
dc.date.issued2025-07-21
dc.description.abstractGlobal blue carbon assessments are hindered by a lack of data from understudied seagrass regions, such as those of Western Africa. This study reports the first in situ records of organic carbon (OC) stocks and burial rates for seagrass beds at Arguin Island, Banc d'Arguin (Mauritania), Western Africa, measured in intertidal Zostera noltei and subtidal Cymodocea nodosa meadows. The major blue carbon sources in seagrass meadows since 1900 were assessed using sedimentary environmental DNA (eDNA) and chronostratigraphy. The OC stocks in the top 50 cm of the sediment cores were not significantly different between the beds of the two seagrass species and averaged 27.8±7.14 Mg C ha−1, which is 5 times higher than that in adjacent unvegetated sediments. The OC sequestration rate for the past 100 years was 10.3±1.4 g C m−2 year−1 in C. nodosa sediments and 12.3±5.9 g C m−2 year−1 in Z. noltei sediments. Sedimentary eDNA analysis revealed that the major OC source within the C. nodosa and Z. noltei sediments has been the seagrass species itself, with low contributions from allochthonous eDNA reads. Carbon sources in Z. noltei meadows were more diverse than those in C. nodosa meadows. In bare sediment, diatoms were the major carbon source. The present study demonstrates the potential of sedimentary eDNA to reveal the major sources of organic matter in blue carbon ecosystems, improving our understanding of the provenance of sedimentary OC and thus carbon cycling processes. Additionally, it provides new OC stock and sequestration rate measurements from a region of the world that remains underrepresented in global blue carbon assessments.eng
dc.description.sponsorshipPRCM/ STM POOOA4/OA9
dc.identifier.doi10.1007/s00027-025-01211-0
dc.identifier.eissn1420-9055
dc.identifier.issn1015-1621
dc.identifier.urihttp://hdl.handle.net/10400.1/28486
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relationAssessment and restoration of coastal blue carbon stocks in Portugal for climate change mitigation (BLUEPORT)
dc.relationBlue carbon inventories in the warm temperate NE Atlantic seagrass meadows
dc.relationThe new aquatic fauna of southern Portugal and their potential as economic resources: a collaborative merge between science and society
dc.relation.ispartofAquatic Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBlue carbon
dc.subjectSedimentary environmental DNA
dc.subjectOrganic carbon stocks
dc.subjectCarbon sequestration rates
dc.subjectMauritania
dc.subjectSeagrass
dc.titleFirst assessment of blue carbon stocks, sequestration rates and potential sources since 1900 at Arguin Island (Mauritania)eng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDB/04326/2020
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oaire.awardNumberLA/P/0101/2020
oaire.awardNumber2020.03825.CEECIND/CP1597/CT0005
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oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardTitleAssessment and restoration of coastal blue carbon stocks in Portugal for climate change mitigation (BLUEPORT)
oaire.awardTitleBlue carbon inventories in the warm temperate NE Atlantic seagrass meadows
oaire.awardTitleThe new aquatic fauna of southern Portugal and their potential as economic resources: a collaborative merge between science and society
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oaire.citation.issue4
oaire.citation.titleAquatic Sciences - Research Across Boundaries
oaire.citation.volume87
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