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Biotic and abiotic factors governing dune response to storm events

2021Journal article Restricted access
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dc.contributor.authorGarzon, Juan L.
dc.contributor.authorCostas, Susana
dc.contributor.authorFerreira, Oscar
dc.date.accessioned2022-02-24T17:33:08Z
dc.date.available2022-11-01T01:30:15Z
dc.date.issued2021
dc.description.abstractThe alongshore response of dunes to storm events can be extremely variable and,consequently, their capacity to maintain their services, including the protection ofhinterland communities. In this study, the role of biotic and abiotic factors determin-ing the magnitude of dune retreat driven by a severe storm along a 60 km barrierisland system was investigated. Data from high-resolution satellite imagery, digitalterrain models, and wave propagation models were used in this assessment. Theassessed abiotic factors included the backshore volume, dune height, downdrift inletdistance, and incident wave power. The evaluated biotic factor was the vegetationcover, characterized by a vegetation index retrieved from the multispectral imagery.The results revealed large alongshore variability on dune retreat, ranging from negli-gible impact to ca. 40 m of retreat. All combined factors allowed us to explain up to70% of the dune retreat variability through a multi-regression analysis. Among allinvestigated factors, the major contributor controlling the magnitude of dune retreatwas the backshore volume (more robust berms reduced the retreat) followed by thewave power (normal and longitudinal components). Moreover, the removal of localsalient features in the dune line caused the straightening of the coastline, highly con-tributing to the development of dune retreat hotspots. The other evaluated factorshad a smaller influence on reducing coastal retreat, including the vegetation, whosecontribution to dune protection was around one order of magnitude lower than thatprovided by the backshore volume. The results highlight the importance of regionalassessments to understand the causes behind the large alongshore variability ofstorm impacts at dunes. They also state the relatively low influence of the vegetationfrom this climatic region to enhance dune resistance to storms.pt_PT
dc.description.sponsorshipALG-LISBOA01-145-FEDER-028657
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1002/esp.5300pt_PT
dc.identifier.issn0197-9337
dc.identifier.urihttp://hdl.handle.net/10400.1/17614
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relation52334pt_PT
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.subjectBackshorept_PT
dc.subjectDune retreatpt_PT
dc.subjectDune vegetationpt_PT
dc.subjectNDVIpt_PT
dc.subjectRia Formosapt_PT
dc.subjectStorm Emmapt_PT
dc.subjectWave directionpt_PT
dc.titleBiotic and abiotic factors governing dune response to storm eventspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Marine and Environmental Research (CIMA)
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FCTA-GFI%2F28949%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00350%2F2020/PT
oaire.citation.titleEarth Surface Processes and Landformspt_PT
oaire.fundingStream9471 - RIDTI
oaire.fundingStream6817 - DCRRNI ID
person.familyNameGarzon
person.familyNameCostas
person.familyNameFerreira
person.givenNameJuan L.
person.givenNameSusana
person.givenNameÓscar
person.identifier1448818
person.identifier.ciencia-idCB1A-D085-6C56
person.identifier.ciencia-idAF19-9EEE-7550
person.identifier.ciencia-id1F1C-DF44-94C9
person.identifier.orcid0000-0001-7641-4144
person.identifier.orcid0000-0002-4005-077X
person.identifier.orcid0000-0001-9975-0036
person.identifier.scopus-author-id9043656500
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.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscovery62d73183-10ba-42ca-80a7-458c42d1375b
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