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...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2020-12-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2020.552731/full |
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| author | Muhammed Fatih Sert Juliana D’Andrilli Friederike Gründger Friederike Gründger Helge Niemann Helge Niemann Helge Niemann Mats A. Granskog Alexey K. Pavlov Alexey K. Pavlov Bénédicte Ferré Anna Silyakova |
| author_facet | Muhammed Fatih Sert Juliana D’Andrilli Friederike Gründger Friederike Gründger Helge Niemann Helge Niemann Helge Niemann Mats A. Granskog Alexey K. Pavlov Alexey K. Pavlov Bénédicte Ferré Anna Silyakova |
| author_sort | Muhammed Fatih Sert |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-19T14:45:27Z |
| format | Article |
| id | doaj.art-6fec9e70c13c440b9ba4a69f7a867662 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-19T14:45:27Z |
| publishDate | 2020-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-6fec9e70c13c440b9ba4a69f7a8676622022-12-21T20:16:59ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632020-12-01810.3389/feart.2020.552731552731Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents SeaMuhammed Fatih Sert0Juliana D’Andrilli1Friederike Gründger2Friederike Gründger3Helge Niemann4Helge Niemann5Helge Niemann6Mats A. Granskog7Alexey K. Pavlov8Alexey K. Pavlov9Bénédicte Ferré10Anna Silyakova11CAGE - Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT the Arctic University of Norway, Tromsø, NorwayLouisiana Universities Marine Consortium, Chauvin, LA, United StatesCAGE - Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT the Arctic University of Norway, Tromsø, NorwayArctic Research Centre, Department of Biology, Aarhus University, Aarhus, DenmarkCAGE - Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT the Arctic University of Norway, Tromsø, NorwayNIOZ Royal Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, and Utrecht University, Texel, NetherlandsDepartment of Earth Sciences, Faculty of Geosciences, Utrecht University, Utrecht, NetherlandsNorwegian Polar Institute, Fram Centre, Tromsø, NorwayInstitute of Oceanology, Polish Academy of Sciences, Sopot, PolandAkvaplan-niva, Fram Centre, Tromsø, NorwayCAGE - Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT the Arctic University of Norway, Tromsø, NorwayCAGE - Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT the Arctic University of Norway, Tromsø, NorwayDissociating 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.https://www.frontiersin.org/articles/10.3389/feart.2020.552731/fullmethane hydratemethane oxidationmethane oxidizing bacteriaarctic oceanFourier-transform ion cyclotron resonance mass spectrometrynutrients |
| spellingShingle | Muhammed Fatih Sert Juliana D’Andrilli Friederike Gründger Friederike Gründger Helge Niemann Helge Niemann Helge Niemann Mats A. Granskog Alexey K. Pavlov Alexey K. Pavlov Bénédicte Ferré Anna Silyakova Compositional Differences in Dissolved Organic Matter Between Arctic Cold Seeps Versus Non-Seep Sites at the Svalbard Continental Margin and the Barents Sea Frontiers in Earth Science methane hydrate methane oxidation methane oxidizing bacteria arctic ocean Fourier-transform ion cyclotron resonance mass spectrometry nutrients |
| 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_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_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_sort | compositional differences in dissolved organic matter between arctic cold seeps versus non seep sites at the svalbard continental margin and the barents sea |
| topic | methane hydrate methane oxidation methane oxidizing bacteria arctic ocean Fourier-transform ion cyclotron resonance mass spectrometry nutrients |
| url | https://www.frontiersin.org/articles/10.3389/feart.2020.552731/full |
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