Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments
Methane-consuming microbes inhabiting marine methane seeps have recently been found to have the capacity to assimilate inorganic nitrogen, suggesting a previously unaccounted role in the global nitrogen cycle. Despite ex-situ experimental observations, definitive evidence of this process under in-si...
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Online Access: | https://hdl.handle.net/10037/29821 https://doi.org/10.1016/j.chemgeo.2023.121638 |
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ftunivtroemsoe:oai:munin.uit.no:10037/29821 2023-08-27T04:08:41+02:00 Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments Argentino, Claudio Wittig, Cathrin Peckmann, Jörn Panieri, Giuliana 2023-07-19 https://hdl.handle.net/10037/29821 https://doi.org/10.1016/j.chemgeo.2023.121638 eng eng Elsevier Chemical Geology Norges forskningsråd: 223259 Norges forskningsråd: 287869 Argentino C, Wittig C, Peckmann J, Panieri G. Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments. Chemical Geology. 2023;636 FRIDAID 2163397 doi:10.1016/j.chemgeo.2023.121638 0009-2541 1872-6836 https://hdl.handle.net/10037/29821 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.1016/j.chemgeo.2023.121638 2023-08-09T23:07:01Z Methane-consuming microbes inhabiting marine methane seeps have recently been found to have the capacity to assimilate inorganic nitrogen, suggesting a previously unaccounted role in the global nitrogen cycle. Despite ex-situ experimental observations, definitive evidence of this process under in-situ conditions remains elusive, hindering the complete understanding of the controlling factors and magnitude of this process. We present the isotopic variations of organic carbon δ13Corg and total nitrogen δ15N values in two sediment cores collected from the gas hydrate-bearing Håkon Mosby Mud Volcano, SW Barents Sea (72°N, ∼1260 m water depth). We identified a stratigraphic interval containing methane-derived carbonates directly overlying a gas hydrate layer at 67 cm and typified by δ13Corg and δ15N as low as −42.0‰ and 1.2‰, respectively. Stable isotope mixing models confirm in-situ nitrogen uptake by methanotrophic consortia, contributing to up to 49.1 wt% of the local bulk sedimentary organic matter – a finding calling for reevaluation of the role of methane seeps in the oceanic nitrogen cycle Article in Journal/Newspaper Barents Sea University of Tromsø: Munin Open Research Archive Barents Sea Chemical Geology 636 121638 |
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Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
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ftunivtroemsoe |
language |
English |
description |
Methane-consuming microbes inhabiting marine methane seeps have recently been found to have the capacity to assimilate inorganic nitrogen, suggesting a previously unaccounted role in the global nitrogen cycle. Despite ex-situ experimental observations, definitive evidence of this process under in-situ conditions remains elusive, hindering the complete understanding of the controlling factors and magnitude of this process. We present the isotopic variations of organic carbon δ13Corg and total nitrogen δ15N values in two sediment cores collected from the gas hydrate-bearing Håkon Mosby Mud Volcano, SW Barents Sea (72°N, ∼1260 m water depth). We identified a stratigraphic interval containing methane-derived carbonates directly overlying a gas hydrate layer at 67 cm and typified by δ13Corg and δ15N as low as −42.0‰ and 1.2‰, respectively. Stable isotope mixing models confirm in-situ nitrogen uptake by methanotrophic consortia, contributing to up to 49.1 wt% of the local bulk sedimentary organic matter – a finding calling for reevaluation of the role of methane seeps in the oceanic nitrogen cycle |
format |
Article in Journal/Newspaper |
author |
Argentino, Claudio Wittig, Cathrin Peckmann, Jörn Panieri, Giuliana |
spellingShingle |
Argentino, Claudio Wittig, Cathrin Peckmann, Jörn Panieri, Giuliana Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments |
author_facet |
Argentino, Claudio Wittig, Cathrin Peckmann, Jörn Panieri, Giuliana |
author_sort |
Argentino, Claudio |
title |
Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments |
title_short |
Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments |
title_full |
Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments |
title_fullStr |
Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments |
title_full_unstemmed |
Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments |
title_sort |
nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/29821 https://doi.org/10.1016/j.chemgeo.2023.121638 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_relation |
Chemical Geology Norges forskningsråd: 223259 Norges forskningsråd: 287869 Argentino C, Wittig C, Peckmann J, Panieri G. Nitrogen uptake by methanotrophic consortia in deep-water gas hydrate-bearing sediments. Chemical Geology. 2023;636 FRIDAID 2163397 doi:10.1016/j.chemgeo.2023.121638 0009-2541 1872-6836 https://hdl.handle.net/10037/29821 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1016/j.chemgeo.2023.121638 |
container_title |
Chemical Geology |
container_volume |
636 |
container_start_page |
121638 |
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1775349539318792192 |