Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N
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 refect incorporation of methane-derived carbon. A deeper understanding of isotopic signatures of...
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Online Access: | https://hdl.handle.net/10037/24517 https://doi.org/10.1038/s41598-022-05175-1 |
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ftunivtroemsoe:oai:munin.uit.no:10037/24517 2023-05-15T15:07:17+02:00 Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N Melaniuk, Katarzyna Sztybor, Kamila Treude, Tina Sommer, Stefan Rasmussen, Tine Lander 2022-01-21 https://hdl.handle.net/10037/24517 https://doi.org/10.1038/s41598-022-05175-1 eng eng Nature Scientific Reports Melaniuk 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;12 FRIDAID 1989469 doi:10.1038/s41598-022-05175-1 2045-2322 https://hdl.handle.net/10037/24517 openAccess Copyright 2022 The Author(s) Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.1038/s41598-022-05175-1 2022-03-23T23:58:04Z 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 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 13 C and δ 18 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 13 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. Article in Journal/Newspaper Arctic Climate change Foraminifera* Fram Strait University of Tromsø: Munin Open Research Archive Arctic Scientific Reports 12 1 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
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 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 13 C and δ 18 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 13 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. |
format |
Article in Journal/Newspaper |
author |
Melaniuk, Katarzyna Sztybor, Kamila Treude, Tina Sommer, Stefan Rasmussen, Tine Lander |
spellingShingle |
Melaniuk, Katarzyna Sztybor, Kamila Treude, Tina Sommer, Stefan Rasmussen, Tine Lander Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N |
author_facet |
Melaniuk, Katarzyna Sztybor, Kamila Treude, Tina Sommer, Stefan Rasmussen, Tine Lander |
author_sort |
Melaniuk, Katarzyna |
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 |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/24517 https://doi.org/10.1038/s41598-022-05175-1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Foraminifera* Fram Strait |
genre_facet |
Arctic Climate change Foraminifera* Fram Strait |
op_relation |
Scientific Reports Melaniuk 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;12 FRIDAID 1989469 doi:10.1038/s41598-022-05175-1 2045-2322 https://hdl.handle.net/10037/24517 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.1038/s41598-022-05175-1 |
container_title |
Scientific Reports |
container_volume |
12 |
container_issue |
1 |
_version_ |
1766338827019878400 |