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 reflect incorporation of methane-derived carbon. A deeper understanding of isotopic signatures o...
Published in: | Scientific Reports |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Nature Research
2022
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/55036/ https://oceanrep.geomar.de/id/eprint/55036/1/s41598-022-05175-1.pdf https://oceanrep.geomar.de/id/eprint/55036/2/41598_2022_5175_MOESM1_ESM.docx https://doi.org/10.1038/s41598-022-05175-1 |
id |
ftoceanrep:oai:oceanrep.geomar.de:55036 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:55036 2024-02-11T10:01:24+01:00 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 L. 2022-01-21 text https://oceanrep.geomar.de/id/eprint/55036/ https://oceanrep.geomar.de/id/eprint/55036/1/s41598-022-05175-1.pdf https://oceanrep.geomar.de/id/eprint/55036/2/41598_2022_5175_MOESM1_ESM.docx https://doi.org/10.1038/s41598-022-05175-1 en eng Nature Research https://oceanrep.geomar.de/id/eprint/55036/1/s41598-022-05175-1.pdf https://oceanrep.geomar.de/id/eprint/55036/2/41598_2022_5175_MOESM1_ESM.docx Melaniuk, K., Sztybor, K., Treude, T., Sommer, S. and Rasmussen, T. L. (2022) Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N. Open Access Scientific Reports, 12 . Art.Nr. 1169. DOI 10.1038/s41598-022-05175-1 <https://doi.org/10.1038/s41598-022-05175-1>. doi:10.1038/s41598-022-05175-1 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.1038/s41598-022-05175-1 2024-01-15T00:24:50Z 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Scientific Reports 12 1 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
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 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 |
Melaniuk, Katarzyna Sztybor, Kamila Treude, Tina Sommer, Stefan Rasmussen, Tine L. |
spellingShingle |
Melaniuk, Katarzyna Sztybor, Kamila Treude, Tina Sommer, Stefan Rasmussen, Tine L. 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 L. |
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 Research |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/55036/ https://oceanrep.geomar.de/id/eprint/55036/1/s41598-022-05175-1.pdf https://oceanrep.geomar.de/id/eprint/55036/2/41598_2022_5175_MOESM1_ESM.docx 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 |
https://oceanrep.geomar.de/id/eprint/55036/1/s41598-022-05175-1.pdf https://oceanrep.geomar.de/id/eprint/55036/2/41598_2022_5175_MOESM1_ESM.docx Melaniuk, K., Sztybor, K., Treude, T., Sommer, S. and Rasmussen, T. L. (2022) Influence of methane seepage on isotopic signatures in living deep-sea benthic foraminifera, 79° N. Open Access Scientific Reports, 12 . Art.Nr. 1169. DOI 10.1038/s41598-022-05175-1 <https://doi.org/10.1038/s41598-022-05175-1>. doi:10.1038/s41598-022-05175-1 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41598-022-05175-1 |
container_title |
Scientific Reports |
container_volume |
12 |
container_issue |
1 |
_version_ |
1790597214445240320 |