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dc.contributor.authorPreckler, Carlos Angulo
dc.contributor.authorPernet, Philippe
dc.contributor.authorGarcía-Hernández, Cristina
dc.contributor.authorKereszturi, Gabor
dc.contributor.authorÁlvarez-Valero, Antonio M.
dc.contributor.authorHopfenblatt, Joaquín
dc.contributor.authorGómez-Ballesteros, María
dc.contributor.authorOtero, Xosé L.
dc.contributor.authorCaza, Jaime
dc.contributor.authorRuiz-Fernández, Jesús
dc.contributor.authorGeyer, Adelina
dc.contributor.authorAvila, Conxita
dc.date.accessioned2022-02-08T10:09:52Z
dc.date.available2022-02-08T10:09:52Z
dc.date.issued2021-03-17
dc.description.abstractDeception Island is amongst the most active volcanoes in the Southern Ocean, with over 20 explosive eruptions in the last ca. 200 years. The eruption that formed the caldera at Deception Island occurred 3980 ± 125 calendar years Before Present, and it is the largest eruptive event documented in Antarctica during Holocene. Since then, post-caldera volcanic activity has comprised many scattered eruptive vents across the island. Mortality of benthic organisms has been reported during the most recent eruptions occurred on the island, in 1967, 1969, and 1970 Common Era (CE), with very low abundances of organisms during the 1967–1973 CE period. Within the sea-flooded part of the caldera depression, named Port Foster, a submarine volcanic axis with several volcanic cones is observed. An interdisciplinary team sampled the best morphologically preserved volcanic edifice within Port Foster, the so-called Stanley Patch. Geophysical data traced the volcano and characterized its morphology and inner structure. Underwater scuba sampling allowed to acquire sediment and rock samples, photographs and video images of the benthic organisms and seascape. Morphology of Stanley Patch cone and textural characteristics of the collected pyroclastic rocks indicate that the volcanic edifice was originated during an explosive eruption. Furthermore, the lack of palagonitization, quenched pyroclast margins, and hyaloclastite deposits indicate that this cone has formed on-land, before the caldera floor became inundated by the seawater, highlighting the complex intra-caldera evolution of Deception Island. A sediment core from the crater was collected for sedimentological, and geochemical analysis. Antarctic climate and seasonal sea ice, together with organic degradation due to high sedimentation rates, explain the low total organic carbon data measured. The volcanic history of the island has probably avoided the development of a stable benthic community over time, similar to other Antarctic shallow communities. Moreover, the current geomorphological conditions still shape different benthic communities than in the surrounding coastal ecosystems. Stanley Patch, and the whole Port Foster, provide a natural laboratory for benchmarking the reestablishment of benthic communities on a volcanic-influenced shallow marine environment, offering relevant data for future studies evaluating global climate change effects on the Antarctic seabed.en_US
dc.identifier.citationPreckler CA, Pernet, García-Hernández, Kereszturi, Álvarez-Valero, Hopfenblatt, Gómez-Ballesteros, Otero, Caza, Ruiz-Fernández, Geyer, Avila. Volcanism and rapid sedimentation affect the benthic communities of Deception Island, Antarctica. Continental Shelf Research. 2021;220en_US
dc.identifier.cristinIDFRIDAID 1983516
dc.identifier.doi10.1016/j.csr.2021.104404
dc.identifier.issn0278-4343
dc.identifier.issn1873-6955
dc.identifier.urihttps://hdl.handle.net/10037/23950
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalContinental Shelf Research
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.titleVolcanism and rapid sedimentation affect the benthic communities of Deception Island, Antarcticaen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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