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A paradise for Maldane sarsi antarctica: preliminary characterization of the marine soft-bottom fauna of false bay (Livingston Island, South Shetland Islands, Antarctica)

2025-06-04Journal article Open access
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dc.contributor.authorBascur, Miguel
dc.contributor.authorPrófumo, Andrea
dc.contributor.authorGonzalez-Pineda, Mariona
dc.contributor.authorMonràs-Riera, Pere
dc.contributor.authorAzcárate-García, Tomás
dc.contributor.authorAubach-Masip, Àlex
dc.contributor.authorLlobet, Marina De
dc.contributor.authorMolina-Vacas, Guillem
dc.contributor.authorTibiriçá, Yara
dc.contributor.authorBallesté, Elisenda
dc.contributor.authorGil, João
dc.contributor.authorAvila, Conxita
dc.date.accessioned2025-07-25T10:44:58Z
dc.date.available2025-07-25T10:44:58Z
dc.date.issued2025-06-04
dc.description.abstractSoft-bottom areas are among the least explored ecosystems in Antarctica. To improve our understanding of these environments, we performed a preliminary assessment of the marine macrobenthic fauna in False Bay, Livingston Island, near Huntress Glacier (South Shetland Islands, Antarctica). Fourteen Van Veen grabs (0.018 m(2) area) were deployed at two stations within the bay at depths of 174-210 m. The samples provided values up to 159 556 individuals m(-2) within 15 major taxonomic groups. Annelida Polychaeta was predominant (similar to 93%), followed by Ophiuroidea and Bivalvia at the external station and Bivalvia and Amphipoda at the internal site. Maldanid polychaetes, particularly Maldane sarsi antarctica, constituted 84.62-90.74% of the samples. Total biomass was 6673.25 grams of wet weight per square metre, mainly from Ascidiacea, Polychaeta, Holothuroidea and Ophiuroidea. Approximately 12% of the macrofauna inhabited the sediment (epifauna), while 88% lived into the sediments (infauna). Regarding feeding modes, specimens were detritivores (77.91-82.71%), suspension-feeders (7.59-13.37%) and, infrequently, predators (4.07-5.07%) and grazers (4.63-4.65%). According to the compilation of occurrence records in the Southern Ocean, M. sarsi antarctica has a circum-Antarctic distribution. Furthermore, the population of this species in False Bay appears to be stable and undisturbed with a normal distribution in size structure, with a higher proportion of individuals at intermediate sizes (2.85-4.26 cm). This study provides for the first time detailed descriptions of the macrofauna from the soft bottoms of False Bay, representing a preliminary effort to monitor ecological shifts in this critically important and understudied region, which is experiencing rapid environmental changes within Antarctic marine ecosystems.eng
dc.description.sponsorshipCHALLENGE (PID2019-107979RB-100 funded by MICIU/AEI/10.13039/501100011033; FPI Grant (PRE2019-091200); FPI Grant PRE2020-096185; MCIN/AEI/10.13039/501100011033
dc.identifier.doi10.1017/s0954102025000185
dc.identifier.eissn1365-2079
dc.identifier.issn0954-1020
dc.identifier.urihttp://hdl.handle.net/10400.1/27495
dc.language.isoeng
dc.peerreviewedyes
dc.publisherCambridge University Press
dc.relation.ispartofAntarctic Science
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAnnelida Polychaeta
dc.subjectMarine invertebrates
dc.subjectPolar assemblages
dc.subjectSedimentary habitats
dc.subjectSouthern Ocean
dc.titleA paradise for Maldane sarsi antarctica: preliminary characterization of the marine soft-bottom fauna of false bay (Livingston Island, South Shetland Islands, Antarctica)eng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleAntarctic Science
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameGil
person.givenNameJoão
person.identifier.ciencia-idA519-5EDC-1B32
person.identifier.orcid0000-0002-1856-3333
person.identifier.scopus-author-id7201625624
relation.isAuthorOfPublication8462d152-0fd8-49a1-98c2-ec2ed5179446
relation.isAuthorOfPublication.latestForDiscovery8462d152-0fd8-49a1-98c2-ec2ed5179446

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