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Physical-ecological modelling of the transport, dispersal and connectivity of crustacean larvae in the Gulf of Cadiz and through the Strait of Gibraltar

2022-01Doctoral thesis Open access
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datacite.subject.fosCiências Naturais::Ciências da Terra e do Ambientept_PT
dc.contributor.advisorSantos, Antonina Maria de Melo dos
dc.contributor.advisorPeliz, Álvaro Júdice Ribeiro
dc.contributor.authorPires, Rita Filomena Teixeira
dc.date.accessioned2022-05-05T16:48:36Z
dc.date.available2025-02-01T01:30:50Z
dc.date.issued2022-01
dc.date.submitted2021-08
dc.description.abstractThe mechanisms of decapod larval dispersal were explored for the northeastern Atlantic‒western Mediterranean Sea region, a transition zone between temperate and tropical ecosystems where larval transport has been scarcely addressed. The main goal of this thesis was to understand the impact of the complex oceanic circulation and biological variables on transport and dispersal patterns. An ecological characterization of the decapod larval assemblages of each sub-basin was followed by the selection of benthic and demersal species to be used as biological references in modelling approaches. Combined oceanic simulations and particle-tracking Lagrangian experiments, developed according to in situ data on larvae, were used. Potential transport mechanisms, dispersal pathways, and the key physical and behavioural factors involved were identified, and connectivity metrics estimated. For the southern Portuguese margin, the larval transport, and the strategies of shelf exportation and return to the adult habitats were examined, focusing on the coastal crab Pachygrapsus marmoratus and the deep-water shrimp Parapenaeus longirostris. The connectivity with the western Alboran Sea through the Strait of Gibraltar and with the northwestern African margin was estimated, using larvae of Processa shrimps. Similar taxonomic composition of the larval assemblages was found, although dominated by distinct groups, linked to the ocean dynamics of each sub-basin. The simulations revealed distinct potential dispersal pathways in the region for larvae drifting from shelf or slope areas and following active or passive transport. High connectivity was simulated within the Alboran and along the northern margins in the Atlantic-Alboran direction, suggesting the retention of shelf-dwelling and epipelagic larvae in the sub-basin. The Alboran-Atlantic transport was enhanced in deep-water layers. In all exercises, the areas of particle release and the vertical positions defined the retention over or transport into productive shelf waters, dictating the transport direction and the connectivity throughout the region.pt_PT
dc.identifier.tid101579446pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/52747
dc.language.isoengpt_PT
dc.relationModelling crustacean larvae dispersal: Physical-ecological connectivity in the Gulf of Cadiz and across the Strait of Gibraltar
dc.subjectDecapodapt_PT
dc.subjectdispersão larvarpt_PT
dc.subjectconectividadept_PT
dc.subjectmodelação biofísicapt_PT
dc.subjectregião Atlanto-Mediterrâneapt_PT
dc.subjectlarval dispersalpt_PT
dc.subjectconnectivitypt_PT
dc.subjectbiophysical modellingpt_PT
dc.subjectAtlantic-Mediterranean regionpt_PT
dc.titlePhysical-ecological modelling of the transport, dispersal and connectivity of crustacean larvae in the Gulf of Cadiz and through the Strait of Gibraltarpt_PT
dc.typedoctoral thesis
dspace.entity.typePublication
oaire.awardTitleModelling crustacean larvae dispersal: Physical-ecological connectivity in the Gulf of Cadiz and across the Strait of Gibraltar
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F139269%2F2018/PT
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typedoctoralThesispt_PT
relation.isProjectOfPublication97ab36d2-f700-4c91-a6da-4bbf30a01e5d
relation.isProjectOfPublication.latestForDiscovery97ab36d2-f700-4c91-a6da-4bbf30a01e5d
thesis.degree.nameTese de doutoramento, Ciências do Mar, Universidade de Lisboa, Faculdade de Ciências, 2022pt_PT

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