Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean
Hydrothermal vents modify and displace subsurface dissolved organic matter (DOM) into the ocean. Once in the ocean, this DOM is transported together with elements, particles, dissolved gases and biomass along with the neutrally buoyant plume layer. Considering the number and extent of actively venti...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2022
|
Subjects: | |
Online Access: | https://doi.org/10.5194/bg-19-2101-2022 https://doaj.org/article/22081addfed84a988796332122a30a04 |
id |
ftdoajarticles:oai:doaj.org/article:22081addfed84a988796332122a30a04 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:22081addfed84a988796332122a30a04 2023-05-15T14:59:56+02:00 Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean M. F. Sert H. Niemann E. P. Reeves M. A. Granskog K. P. Hand T. Kekäläinen J. Jänis P. E. Rossel B. Ferré A. Silyakova F. Gründger 2022-04-01T00:00:00Z https://doi.org/10.5194/bg-19-2101-2022 https://doaj.org/article/22081addfed84a988796332122a30a04 EN eng Copernicus Publications https://bg.copernicus.org/articles/19/2101/2022/bg-19-2101-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-2101-2022 1726-4170 1726-4189 https://doaj.org/article/22081addfed84a988796332122a30a04 Biogeosciences, Vol 19, Pp 2101-2120 (2022) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/bg-19-2101-2022 2022-12-31T00:08:52Z Hydrothermal vents modify and displace subsurface dissolved organic matter (DOM) into the ocean. Once in the ocean, this DOM is transported together with elements, particles, dissolved gases and biomass along with the neutrally buoyant plume layer. Considering the number and extent of actively venting hydrothermal sites in the oceans, their contribution to the oceanic DOM pool may be substantial. Here, we investigate the dynamics of DOM in relation to hydrothermal venting and related processes at the as yet unexplored Aurora hydrothermal vent field within the ultraslow-spreading Gakkel Ridge in the Arctic Ocean at 82.9 ∘ N. We examined the vertical distribution of DOM composition from sea ice to deep waters at six hydrocast stations distal to the active vent and its neutrally buoyant plume layer. In comparison to background seawater, we found that the DOM in waters directly affected by the hydrothermal plume was molecularly less diverse and 5 %–10 % lower in number of molecular formulas associated with the molecular categories related to lipid and protein-like compounds. On the other hand, samples that were not directly affected by the plume were chemically more diverse and had a higher percentage of chemical formulas associated with the carbohydrate-like category. Our results suggest that hydrothermal processes at Aurora may influence the DOM distribution in the bathypelagic ocean by spreading more thermally and/or chemically induced compositions, while DOM compositions in epipelagic and mesopelagic layers are mainly governed by the microbial carbon pump dynamics and surface-ocean–sea-ice interactions. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice ice covered waters Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Biogeosciences 19 8 2101 2120 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 M. F. Sert H. Niemann E. P. Reeves M. A. Granskog K. P. Hand T. Kekäläinen J. Jänis P. E. Rossel B. Ferré A. Silyakova F. Gründger Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Hydrothermal vents modify and displace subsurface dissolved organic matter (DOM) into the ocean. Once in the ocean, this DOM is transported together with elements, particles, dissolved gases and biomass along with the neutrally buoyant plume layer. Considering the number and extent of actively venting hydrothermal sites in the oceans, their contribution to the oceanic DOM pool may be substantial. Here, we investigate the dynamics of DOM in relation to hydrothermal venting and related processes at the as yet unexplored Aurora hydrothermal vent field within the ultraslow-spreading Gakkel Ridge in the Arctic Ocean at 82.9 ∘ N. We examined the vertical distribution of DOM composition from sea ice to deep waters at six hydrocast stations distal to the active vent and its neutrally buoyant plume layer. In comparison to background seawater, we found that the DOM in waters directly affected by the hydrothermal plume was molecularly less diverse and 5 %–10 % lower in number of molecular formulas associated with the molecular categories related to lipid and protein-like compounds. On the other hand, samples that were not directly affected by the plume were chemically more diverse and had a higher percentage of chemical formulas associated with the carbohydrate-like category. Our results suggest that hydrothermal processes at Aurora may influence the DOM distribution in the bathypelagic ocean by spreading more thermally and/or chemically induced compositions, while DOM compositions in epipelagic and mesopelagic layers are mainly governed by the microbial carbon pump dynamics and surface-ocean–sea-ice interactions. |
format |
Article in Journal/Newspaper |
author |
M. F. Sert H. Niemann E. P. Reeves M. A. Granskog K. P. Hand T. Kekäläinen J. Jänis P. E. Rossel B. Ferré A. Silyakova F. Gründger |
author_facet |
M. F. Sert H. Niemann E. P. Reeves M. A. Granskog K. P. Hand T. Kekäläinen J. Jänis P. E. Rossel B. Ferré A. Silyakova F. Gründger |
author_sort |
M. F. Sert |
title |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_short |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_full |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_fullStr |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_full_unstemmed |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_sort |
compositions of dissolved organic matter in the ice-covered waters above the aurora hydrothermal vent system, gakkel ridge, arctic ocean |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/bg-19-2101-2022 https://doaj.org/article/22081addfed84a988796332122a30a04 |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) |
geographic |
Arctic Arctic Ocean Gakkel Ridge |
geographic_facet |
Arctic Arctic Ocean Gakkel Ridge |
genre |
Arctic Arctic Ocean Sea ice ice covered waters |
genre_facet |
Arctic Arctic Ocean Sea ice ice covered waters |
op_source |
Biogeosciences, Vol 19, Pp 2101-2120 (2022) |
op_relation |
https://bg.copernicus.org/articles/19/2101/2022/bg-19-2101-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-2101-2022 1726-4170 1726-4189 https://doaj.org/article/22081addfed84a988796332122a30a04 |
op_doi |
https://doi.org/10.5194/bg-19-2101-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
8 |
container_start_page |
2101 |
op_container_end_page |
2120 |
_version_ |
1766332055440850944 |