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Origin and driving mechanisms of marine litter in the shelf-incised Motril, Carchuna, and Calahonda canyons (northern Alboran Sea)

2023Journal article Open access
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dc.contributor.authorCerrillo-Escoriza, Javier
dc.contributor.authorLobo, Francisco José
dc.contributor.authorPuga-Bernabéu, Ángel
dc.contributor.authorRueda, José Luis
dc.contributor.authorBárcenas, Patricia
dc.contributor.authorSánchez-Guillamón, Olga
dc.contributor.authorSerna Quintero, José Miguel
dc.contributor.authorPérez Gil, José Luis
dc.contributor.authorMurillo, Yelvana
dc.contributor.authorCaballero-Herrera, José Antonio
dc.contributor.authorLópez-Quirós, Adrián
dc.contributor.authorMendes, Isabel
dc.contributor.authorPérez-Asensio, José Noel
dc.date.accessioned2023-04-15T09:58:08Z
dc.date.available2023-04-15T09:58:08Z
dc.date.issued2023
dc.description.abstractIntroduction and methodsMarine litter density, distribution and potential sources, and the impact on canyon seafloor habitats were investigated in the Motril, Carchuna and Calahonda canyons, located along the northern margin of the Alboran Sea. During the ALSSOMAR-S2S oceanographic survey carried out in 2019, canyon floor imagery was collected by a Remotely Operated Vehicle along 5 km in the Motril Canyon, 10 km in the Carchuna Canyon, and 3 km in Calahonda Canyon, together with 41 surficial sediment samples. Additionally, coastal uses, maritime traffic and fishing activity data were analyzed. A 50 m resolution multibeam bathymetry served as base map. ResultsIn the Motril and Calahonda canyons, the density of marine litter was low and the material was dispersed, very degraded and partially buried. In contrast, the Carchuna Canyon contained a greater amount and variety of litter. The Carchuna Canyon thalweg exhibited a density of marine litter up to 8.66 items center dot 100 m(-1), and litter hotspots with a density of up to 42 items center dot m(2) are found along the upper reaches of the canyon thalweg. DiscussionLow litter abundances found in the studied canyons most likely reflect low population densities and the absence of direct connections with streams in the nearby coasts. The high shelf incision of the Carchuna Canyon and its proximity to the coastline favor littoral sediment remobilization and capture as well as the formation of gravity flows that transport the marine litter along the thalweg toward the distal termination of the channel. Litter hotspots are favored by the canyon morphology and the occurrence of rocky outcrops. Most debris is of coastal origin and related to beach occupation and agricultural practices in the adjacent coastal plain. A third origin was represented by fishing gear in the study area. Fishing activity may be producing an impact through physical damage to the skeletons of the colonial scleractinians located in the walls of the Carchuna Canyon. In contrast, the Motril and Calahonda canyons can be considered passive systems that have mainly acted as depositional sinks in the recent past, as evidenced by buried marine litter.pt_PT
dc.description.sponsorship18-ESMARES2-CIRCA project of the Instituto Español de Oceanografıa; DL57/2016/CP1361/CT0009pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3389/fmars.2023.1098927pt_PT
dc.identifier.eissn2296-7745
dc.identifier.urihttp://hdl.handle.net/10400.1/19461
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontiers Mediapt_PT
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSubmarine canyonspt_PT
dc.subjectMarine litterpt_PT
dc.subjectSeafloor imagerypt_PT
dc.subjectLitter hotspotspt_PT
dc.subjectMarine litter-habitats interactionpt_PT
dc.subjectFishing gearpt_PT
dc.subjectFishing effortpt_PT
dc.subjectAlboran Seapt_PT
dc.titleOrigin and driving mechanisms of marine litter in the shelf-incised Motril, Carchuna, and Calahonda canyons (northern Alboran Sea)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Marine and Environmental Research (CIMA)
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00350%2F2020/PT
oaire.citation.titleFrontiers in Marine Sciencept_PT
oaire.citation.volume10pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMendes
person.givenNameIsabel Maria de Paiva Pinto
person.identifier.ciencia-id5C15-242C-FDC0
person.identifier.orcid0000-0001-7004-7910
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationc34b90c6-5a34-472c-a658-1d2329a59936
relation.isAuthorOfPublication.latestForDiscoveryc34b90c6-5a34-472c-a658-1d2329a59936
relation.isProjectOfPublication607b395b-b4ff-4b27-b6e4-779cdea78d97
relation.isProjectOfPublication.latestForDiscovery607b395b-b4ff-4b27-b6e4-779cdea78d97

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