Temporal dynamics of carbon sequestration in coastal North Atlantic fjord system as seen through dissolved organic matter characterisation
Fjord systems in higher latitudes are unique coastal water ecosystems that facilitate the study of dissolved organic matter (DOM) dynamics from surface to deeper waters. The current work was undertaken in the Trondheim fjord characterized by North Atlantic waters, and compared DOM fractions from thr...
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2740059 2023-05-15T17:31:17+02:00 Temporal dynamics of carbon sequestration in coastal North Atlantic fjord system as seen through dissolved organic matter characterisation Mathew, K Avarachen Ardelan, Murat Van Villa Gonzalez, Susana Vadstein, Olav Sajith Vezhapparambu, Veena Leiknes, Øystein Mankettikkara, Rahman Olsen, Yngvar 2021 application/pdf https://hdl.handle.net/11250/2740059 https://doi.org/10.1016/j.scitotenv.2021.146402 eng eng Elsevier Norges teknisk-naturvitenskapelige universitet: Internal Funding EC/FP7/603773 Science of the Total Environment. 2021, 782 . urn:issn:0048-9697 https://hdl.handle.net/11250/2740059 https://doi.org/10.1016/j.scitotenv.2021.146402 cristin:1904358 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no CC-BY-NC-ND 15 782 Science of the Total Environment Marine Science Marine Scieence VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 Peer reviewed Journal article 2021 ftntnutrondheimi https://doi.org/10.1016/j.scitotenv.2021.146402 2021-05-05T22:34:39Z Fjord systems in higher latitudes are unique coastal water ecosystems that facilitate the study of dissolved organic matter (DOM) dynamics from surface to deeper waters. The current work was undertaken in the Trondheim fjord characterized by North Atlantic waters, and compared DOM fractions from three depths - surface (3 m), intermediate (225 m) and deep (440 m) in four seasons, from late spring to winter in 2017. The high-resolution mass spectrometry data showed that DOM composition varies significantly in different seasons rather than in different depths in the fjord systems. The bacterial community composition was comparable except at spring surface and summer intermediate depths. Bacterial production was minimal below the euphotic layer, even with sufficient availability of inorganic nutrients. The bacterial production rate in the surface waters was about 7 times and over 50 times higher than that of the aphotic zone in the winter and the summer seasons, respectively. The surface heterotrophic microbial communities might have rapidly consumed the available labile DOM, with the production of more refractory DOM limiting bacterial production in aphotic layers. The greater number of CRAM-like formulas determined in the surface waters compared to other depths supports our hypothesis. The refractory DOM sequestered in the water column may either be exported into sediments attached to particulate matter and marine gels, or may escape into the atmosphere as carbon dioxide/monoxide during the photochemical oxidation pathways, suggesting that it is involved in climate change scenarios. publishedVersion Article in Journal/Newspaper North Atlantic NTNU Open Archive (Norwegian University of Science and Technology) Science of The Total Environment 782 146402 |
institution |
Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
topic |
Marine Science Marine Scieence VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 |
spellingShingle |
Marine Science Marine Scieence VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 Mathew, K Avarachen Ardelan, Murat Van Villa Gonzalez, Susana Vadstein, Olav Sajith Vezhapparambu, Veena Leiknes, Øystein Mankettikkara, Rahman Olsen, Yngvar Temporal dynamics of carbon sequestration in coastal North Atlantic fjord system as seen through dissolved organic matter characterisation |
topic_facet |
Marine Science Marine Scieence VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 |
description |
Fjord systems in higher latitudes are unique coastal water ecosystems that facilitate the study of dissolved organic matter (DOM) dynamics from surface to deeper waters. The current work was undertaken in the Trondheim fjord characterized by North Atlantic waters, and compared DOM fractions from three depths - surface (3 m), intermediate (225 m) and deep (440 m) in four seasons, from late spring to winter in 2017. The high-resolution mass spectrometry data showed that DOM composition varies significantly in different seasons rather than in different depths in the fjord systems. The bacterial community composition was comparable except at spring surface and summer intermediate depths. Bacterial production was minimal below the euphotic layer, even with sufficient availability of inorganic nutrients. The bacterial production rate in the surface waters was about 7 times and over 50 times higher than that of the aphotic zone in the winter and the summer seasons, respectively. The surface heterotrophic microbial communities might have rapidly consumed the available labile DOM, with the production of more refractory DOM limiting bacterial production in aphotic layers. The greater number of CRAM-like formulas determined in the surface waters compared to other depths supports our hypothesis. The refractory DOM sequestered in the water column may either be exported into sediments attached to particulate matter and marine gels, or may escape into the atmosphere as carbon dioxide/monoxide during the photochemical oxidation pathways, suggesting that it is involved in climate change scenarios. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Mathew, K Avarachen Ardelan, Murat Van Villa Gonzalez, Susana Vadstein, Olav Sajith Vezhapparambu, Veena Leiknes, Øystein Mankettikkara, Rahman Olsen, Yngvar |
author_facet |
Mathew, K Avarachen Ardelan, Murat Van Villa Gonzalez, Susana Vadstein, Olav Sajith Vezhapparambu, Veena Leiknes, Øystein Mankettikkara, Rahman Olsen, Yngvar |
author_sort |
Mathew, K Avarachen |
title |
Temporal dynamics of carbon sequestration in coastal North Atlantic fjord system as seen through dissolved organic matter characterisation |
title_short |
Temporal dynamics of carbon sequestration in coastal North Atlantic fjord system as seen through dissolved organic matter characterisation |
title_full |
Temporal dynamics of carbon sequestration in coastal North Atlantic fjord system as seen through dissolved organic matter characterisation |
title_fullStr |
Temporal dynamics of carbon sequestration in coastal North Atlantic fjord system as seen through dissolved organic matter characterisation |
title_full_unstemmed |
Temporal dynamics of carbon sequestration in coastal North Atlantic fjord system as seen through dissolved organic matter characterisation |
title_sort |
temporal dynamics of carbon sequestration in coastal north atlantic fjord system as seen through dissolved organic matter characterisation |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2740059 https://doi.org/10.1016/j.scitotenv.2021.146402 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
15 782 Science of the Total Environment |
op_relation |
Norges teknisk-naturvitenskapelige universitet: Internal Funding EC/FP7/603773 Science of the Total Environment. 2021, 782 . urn:issn:0048-9697 https://hdl.handle.net/11250/2740059 https://doi.org/10.1016/j.scitotenv.2021.146402 cristin:1904358 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.scitotenv.2021.146402 |
container_title |
Science of The Total Environment |
container_volume |
782 |
container_start_page |
146402 |
_version_ |
1766128795275755520 |