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dc.contributor.authorMelaniuk, Katarzyna
dc.contributor.authorSztybor, Kamila
dc.contributor.authorTreude, Tina
dc.contributor.authorSommer, Stefan
dc.contributor.authorRasmussen, Tine Lander
dc.date.accessioned2022-03-23T13:05:59Z
dc.date.available2022-03-23T13:05:59Z
dc.date.issued2022-01-21
dc.description.abstractFossil benthic foraminifera are used to trace past methane release linked to climate change. However, it is still debated whether isotopic signatures of living foraminifera from methane-charged sediments refect incorporation of methane-derived carbon. A deeper understanding of isotopic signatures of living benthic foraminifera from methane-rich environments will help to improve reconstructions of methane release in the past and better predict the impact of future climate warming on methane seepage. Here, we present isotopic signatures (δ<sup>13</sup>C and δ<sup>18</sup>O) of foraminiferal calcite together with biogeochemical data from Arctic seep environments from c. 1200 m water depth, Vestnesa Ridge, 79° N, Fram Strait. Lowest δ<sup>13</sup>C values were recorded in shells of Melonis barleeanus, − 5.2‰ in live specimens and − 6.5‰ in empty shells, from sediments dominated by aerobic (MOx) and anaerobic oxidation of methane (AOM), respectively. Our data indicate that foraminifera actively incorporate methane-derived carbon when living in sediments with moderate seepage activity, while in sediments with high seepage activity the poisonous sulfdic environment leads to death of the foraminifera and an overgrowth of their empty shells by methane-derived authigenic carbonates. We propose that the incorporation of methane-derived carbon in living foraminifera occurs via feeding on methanotrophic bacteria and/or incorporation of ambient dissolved inorganic carbon.en_US
dc.identifier.citationMelaniuk K, Sztybor K, Treude T, Sommer S, Rasmussen TLR. Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N. Scientific Reports. 2022;12en_US
dc.identifier.cristinIDFRIDAID 1989469
dc.identifier.doi10.1038/s41598-022-05175-1
dc.identifier.issn2045-2322
dc.identifier.urihttps://hdl.handle.net/10037/24517
dc.language.isoengen_US
dc.publisherNatureen_US
dc.relation.journalScientific Reports
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleInfluence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° Nen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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