Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea
Dissociating gas hydrates, submerged permafrost, and gas bearing sediments release methane to the water column from a multitude of seeps in the Arctic Ocean. The seeping methane dissolves and supports the growth of aerobic methane oxidizing bacteria (MOB), but the effect of seepage and seep related...
Published in: | Frontiers in Earth Science |
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Online Access: | http://dx.doi.org/10.3389/feart.2020.552731 https://www.frontiersin.org/articles/10.3389/feart.2020.552731/full |
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crfrontiers:10.3389/feart.2020.552731 2024-02-11T10:00:58+01:00 Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea Sert, Muhammed Fatih D’Andrilli, Juliana Gründger, Friederike Niemann, Helge Granskog, Mats A. Pavlov, Alexey K. Ferré, Bénédicte Silyakova, Anna Norges Forskningsråd 2020 http://dx.doi.org/10.3389/feart.2020.552731 https://www.frontiersin.org/articles/10.3389/feart.2020.552731/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 8 ISSN 2296-6463 General Earth and Planetary Sciences journal-article 2020 crfrontiers https://doi.org/10.3389/feart.2020.552731 2024-01-26T09:58:39Z Dissociating gas hydrates, submerged permafrost, and gas bearing sediments release methane to the water column from a multitude of seeps in the Arctic Ocean. The seeping methane dissolves and supports the growth of aerobic methane oxidizing bacteria (MOB), but the effect of seepage and seep related biogeochemical processes on water column dissolved organic matter (DOM) dynamics is not well constrained. We compared dissolved methane, nutrients, chlorophyll, and particulate matter concentrations and methane oxidation (MOx) rates from previously characterized seep and non-seep areas at the continental margin of Svalbard and the Barents Sea in May and June 2017. DOM molecular composition was determined by Electrospray Ionization Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS). We found that the chemical diversity of DOM was 3 to 5% higher and constituted more protein- and lipid-like composition near methane seeps when compared to non-seep areas. Distributions of nutrients, chlorophyll, and particulate matter however, were essentially governed by the water column hydrography and primary production. We surmise that the organic intermediates directly derived from seepage or indirectly from seep-related biogeochemical processes, e.g., MOx, modifies the composition of DOM leading to distinct DOM molecular-level signatures in the water column at cold seeps. Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea permafrost Svalbard Frontiers (Publisher) Arctic Arctic Ocean Barents Sea Svalbard Frontiers in Earth Science 8 |
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Open Polar |
collection |
Frontiers (Publisher) |
op_collection_id |
crfrontiers |
language |
unknown |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Sert, Muhammed Fatih D’Andrilli, Juliana Gründger, Friederike Niemann, Helge Granskog, Mats A. Pavlov, Alexey K. Ferré, Bénédicte Silyakova, Anna Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea |
topic_facet |
General Earth and Planetary Sciences |
description |
Dissociating gas hydrates, submerged permafrost, and gas bearing sediments release methane to the water column from a multitude of seeps in the Arctic Ocean. The seeping methane dissolves and supports the growth of aerobic methane oxidizing bacteria (MOB), but the effect of seepage and seep related biogeochemical processes on water column dissolved organic matter (DOM) dynamics is not well constrained. We compared dissolved methane, nutrients, chlorophyll, and particulate matter concentrations and methane oxidation (MOx) rates from previously characterized seep and non-seep areas at the continental margin of Svalbard and the Barents Sea in May and June 2017. DOM molecular composition was determined by Electrospray Ionization Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS). We found that the chemical diversity of DOM was 3 to 5% higher and constituted more protein- and lipid-like composition near methane seeps when compared to non-seep areas. Distributions of nutrients, chlorophyll, and particulate matter however, were essentially governed by the water column hydrography and primary production. We surmise that the organic intermediates directly derived from seepage or indirectly from seep-related biogeochemical processes, e.g., MOx, modifies the composition of DOM leading to distinct DOM molecular-level signatures in the water column at cold seeps. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Sert, Muhammed Fatih D’Andrilli, Juliana Gründger, Friederike Niemann, Helge Granskog, Mats A. Pavlov, Alexey K. Ferré, Bénédicte Silyakova, Anna |
author_facet |
Sert, Muhammed Fatih D’Andrilli, Juliana Gründger, Friederike Niemann, Helge Granskog, Mats A. Pavlov, Alexey K. Ferré, Bénédicte Silyakova, Anna |
author_sort |
Sert, Muhammed Fatih |
title |
Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea |
title_short |
Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea |
title_full |
Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea |
title_fullStr |
Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea |
title_full_unstemmed |
Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea |
title_sort |
compositional differences in dissolved organic matter between arctic cold seeps versus non-seep sites at the svalbard continental margin and the barents sea |
publisher |
Frontiers Media SA |
publishDate |
2020 |
url |
http://dx.doi.org/10.3389/feart.2020.552731 https://www.frontiersin.org/articles/10.3389/feart.2020.552731/full |
geographic |
Arctic Arctic Ocean Barents Sea Svalbard |
geographic_facet |
Arctic Arctic Ocean Barents Sea Svalbard |
genre |
Arctic Arctic Ocean Barents Sea permafrost Svalbard |
genre_facet |
Arctic Arctic Ocean Barents Sea permafrost Svalbard |
op_source |
Frontiers in Earth Science volume 8 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2020.552731 |
container_title |
Frontiers in Earth Science |
container_volume |
8 |
_version_ |
1790596692276412416 |