Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N
Abstract Fossil 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 reflect incorporation of methane-derived carbon. A deeper understanding of isotopic sig...
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ftdoajarticles:oai:doaj.org/article:8724c7c3f3a74bfcafa71f9a270c4797 2023-05-15T15:07:41+02:00 Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N Katarzyna Melaniuk Kamila Sztybor Tina Treude Stefan Sommer Tine L. Rasmussen 2022-01-01T00:00:00Z https://doi.org/10.1038/s41598-022-05175-1 https://doaj.org/article/8724c7c3f3a74bfcafa71f9a270c4797 EN eng Nature Portfolio https://doi.org/10.1038/s41598-022-05175-1 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-05175-1 2045-2322 https://doaj.org/article/8724c7c3f3a74bfcafa71f9a270c4797 Scientific Reports, Vol 12, Iss 1, Pp 1-13 (2022) Medicine R Science Q article 2022 ftdoajarticles https://doi.org/10.1038/s41598-022-05175-1 2022-12-31T10:49:47Z Abstract Fossil 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 reflect 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 (δ13C and δ18O) of foraminiferal calcite together with biogeochemical data from Arctic seep environments from c. 1200 m water depth, Vestnesa Ridge, 79° N, Fram Strait. Lowest δ13C 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 sulfidic 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. Article in Journal/Newspaper Arctic Climate change Foraminifera* Fram Strait Directory of Open Access Journals: DOAJ Articles Arctic Scientific Reports 12 1 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Medicine R Science Q Katarzyna Melaniuk Kamila Sztybor Tina Treude Stefan Sommer Tine L. Rasmussen Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N |
topic_facet |
Medicine R Science Q |
description |
Abstract Fossil 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 reflect 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 (δ13C and δ18O) of foraminiferal calcite together with biogeochemical data from Arctic seep environments from c. 1200 m water depth, Vestnesa Ridge, 79° N, Fram Strait. Lowest δ13C 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 sulfidic 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. |
format |
Article in Journal/Newspaper |
author |
Katarzyna Melaniuk Kamila Sztybor Tina Treude Stefan Sommer Tine L. Rasmussen |
author_facet |
Katarzyna Melaniuk Kamila Sztybor Tina Treude Stefan Sommer Tine L. Rasmussen |
author_sort |
Katarzyna Melaniuk |
title |
Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N |
title_short |
Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N |
title_full |
Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N |
title_fullStr |
Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N |
title_full_unstemmed |
Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N |
title_sort |
influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° n |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41598-022-05175-1 https://doaj.org/article/8724c7c3f3a74bfcafa71f9a270c4797 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Foraminifera* Fram Strait |
genre_facet |
Arctic Climate change Foraminifera* Fram Strait |
op_source |
Scientific Reports, Vol 12, Iss 1, Pp 1-13 (2022) |
op_relation |
https://doi.org/10.1038/s41598-022-05175-1 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-05175-1 2045-2322 https://doaj.org/article/8724c7c3f3a74bfcafa71f9a270c4797 |
op_doi |
https://doi.org/10.1038/s41598-022-05175-1 |
container_title |
Scientific Reports |
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12 |
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1 |
_version_ |
1766339136561610752 |