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Barrier island resilience assessment: Applying the ecological principles to geomorphological data

2020-11Journal article Restricted
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dc.contributor.authorKombiadou, Katerina
dc.contributor.authorMatias, Ana
dc.contributor.authorCostas, Susana
dc.contributor.authorCarrasco, A. Rita
dc.contributor.authorPlomaritis, Theocharis A.
dc.contributor.authorFerreira, Óscar
dc.date.accessioned2020-06-24T08:45:09Z
dc.date.available2020-06-24T08:45:09Z
dc.date.issued2020-11
dc.date.updated2020-06-24T08:30:11Z
dc.description.abstractApplying the ecological resilience principles to barrier island geomorphological evolution requires approaches that perceive and interpret resilience far from predefined barrier characteristics and static views. Accepting that barrier islands, like all natural systems, are dynamic and adaptively changing in response to external disturbances is fundamental to the formulated approach. To this aim, geomorphological units and dimensions were used to describe barrier island stability landscape as an actively shifting ‘topography’, reshaping in response to exogenous events and in relation to intrinsic properties. The structure of the subaerial barrier was characterised using the environmental units of Beach, Dune and Marsh (or BDM), where different combinations of BDM structure define distinct barrier stable states, under a simplified framework that is applicable over a wide range of barrier structures. The methodology is based on reconstructing resilience trajectories of barrier islands through identifying the distinct BDM states and related shifts (thresholds crossed) and assessing resilience dimensions (latitude, resistance and precariousness defined as barrier width and height and proximity to mainland, respectively) that, jointly, define the shape of the stability domain. The approach was applied to the Ria Formosa barrier island system (S. Portugal), using multi-decadal geomorphological data and gradually decreasing spatial discretisation, passing from individual barrier transects to sectors and to entire barriers. The joint evolution of two inland-migrating barriers (Cabanas Island and Cacela Peninsula) was used as an exemplar of adaptive capacity in barrier geomorphic change and, therefore, of resilient response to external pressures. Resilience pathways showed that the Ria Formosa barriers have been resilient over the studied timeframe, with a tendency for maintaining or increasing BDM structural complexity. In general, the stability domain tends to shift from low latitude and high resistance forms (narrow-deep basins of attraction) in the west part of the barrier chain, to higher latitudes and lower resistance ones (wide-shallow basins) towards the east. Precariousness peaks near the edges of the system (low lagoon width) and minimises towards the central part (most detached barriers). Scaling issues regarding smoothing of longshore variability and potential consequences on masking thresholds and critical dimensions are highlighted and discussed, along with the key role of the meaning of specified resilience (of what?) in the assessment. The methodology is a novel approach, easily transferable to different systems and spatiotemporal scales of analysis, representing a step forward in interpreting and assessing barrier island resilience.pt_PT
dc.description.sponsorshipProvided by PTCRIS: 139656
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.catena.2020.104755pt_PT
dc.identifier.issn0341-8162
dc.identifier.slugcv-prod-1958236
dc.identifier.urihttp://hdl.handle.net/10400.1/14048
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationEVREST-Evolution and resilience of barrier island systems
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectEcological resiliencept_PT
dc.subjectBarrier statespt_PT
dc.subjectThresholdspt_PT
dc.subjectResilience trajectoriespt_PT
dc.subjectGeomorphological evolutionpt_PT
dc.subjectStability landscapept_PT
dc.titleBarrier island resilience assessment: Applying the ecological principles to geomorphological datapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleEVREST-Evolution and resilience of barrier island systems
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR-EST%2F1031%2F2014/PT
oaire.citation.endPage104755pt_PT
oaire.citation.startPage104755pt_PT
oaire.citation.titleCATENApt_PT
oaire.citation.volume194pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameKombiadou
person.familyNameMatias
person.familyNameCostas
person.familyNameCarrasco
person.familyNamePlomaritis
person.familyNameFerreira
person.givenNameKaterina
person.givenNameAna
person.givenNameSusana
person.givenNameA. Rita
person.givenNameTheocharis A.
person.givenNameÓscar
person.identifierR-000-116
person.identifier1448818
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person.identifier.orcid0000-0003-1199-1236
person.identifier.orcid0000-0003-2090-6291
person.identifier.orcid0000-0002-4005-077X
person.identifier.orcid0000-0002-8980-0068
person.identifier.orcid0000-0002-9819-0927
person.identifier.orcid0000-0001-9975-0036
person.identifier.ridM-7458-2017
person.identifier.ridE-9709-2013
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person.identifier.scopus-author-id16029005200
person.identifier.scopus-author-id56260567900
person.identifier.scopus-author-id9043656500
person.identifier.scopus-author-id15724386100
person.identifier.scopus-author-id22836553200
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaid2811-D7C1-1DE2 | Ana Margarida de Almeida Matias
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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