Table_1_Nitrogen Fixation in a Changing Arctic Ocean: An Overlooked Source of Nitrogen?.docx
The Arctic Ocean is the smallest ocean on Earth, yet estimated to play a substantial role as a global carbon sink. As climate change is rapidly changing fundamental components of the Arctic, it is of local and global importance to understand and predict consequences for its carbon dynamics. Primary...
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ftfrontimediafig:oai:figshare.com:article/13420052 2023-05-15T14:33:31+02:00 Table_1_Nitrogen Fixation in a Changing Arctic Ocean: An Overlooked Source of Nitrogen?.docx Lisa W. von Friesen Lasse Riemann 2020-12-18T16:57:50Z https://doi.org/10.3389/fmicb.2020.596426.s001 https://figshare.com/articles/dataset/Table_1_Nitrogen_Fixation_in_a_Changing_Arctic_Ocean_An_Overlooked_Source_of_Nitrogen_docx/13420052 unknown doi:10.3389/fmicb.2020.596426.s001 https://figshare.com/articles/dataset/Table_1_Nitrogen_Fixation_in_a_Changing_Arctic_Ocean_An_Overlooked_Source_of_Nitrogen_docx/13420052 CC BY 4.0 CC-BY Microbiology Microbial Genetics Microbial Ecology Mycology diazotroph nifH cyanobacteria heterotrophic bacteria climate change primary production marine polar Dataset 2020 ftfrontimediafig https://doi.org/10.3389/fmicb.2020.596426.s001 2020-12-23T23:58:41Z The Arctic Ocean is the smallest ocean on Earth, yet estimated to play a substantial role as a global carbon sink. As climate change is rapidly changing fundamental components of the Arctic, it is of local and global importance to understand and predict consequences for its carbon dynamics. Primary production in the Arctic Ocean is often nitrogen-limited, and this is predicted to increase in some regions. It is therefore of critical interest that biological nitrogen fixation, a process where some bacteria and archaea termed diazotrophs convert nitrogen gas to bioavailable ammonia, has now been detected in the Arctic Ocean. Several studies report diverse and active diazotrophs on various temporal and spatial scales across the Arctic Ocean. Their ecology and biogeochemical impact remain poorly known, and nitrogen fixation is so far absent from models of primary production in the Arctic Ocean. The composition of the diazotroph community appears distinct from other oceans – challenging paradigms of function and regulation of nitrogen fixation. There is evidence of both symbiotic cyanobacterial nitrogen fixation and heterotrophic diazotrophy, but large regions are not yet sampled, and the sparse quantitative data hamper conclusive insights. Hence, it remains to be determined to what extent nitrogen fixation represents a hitherto overlooked source of new nitrogen to consider when predicting future productivity of the Arctic Ocean. Here, we discuss current knowledge on diazotroph distribution, composition, and activity in pelagic and sea ice-associated environments of the Arctic Ocean. Based on this, we identify gaps and outline pertinent research questions in the context of a climate change-influenced Arctic Ocean – with the aim of guiding and encouraging future research on nitrogen fixation in this region. Dataset Arctic Arctic Ocean Climate change Sea ice Frontiers: Figshare Arctic Arctic Ocean |
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Open Polar |
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Frontiers: Figshare |
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ftfrontimediafig |
language |
unknown |
topic |
Microbiology Microbial Genetics Microbial Ecology Mycology diazotroph nifH cyanobacteria heterotrophic bacteria climate change primary production marine polar |
spellingShingle |
Microbiology Microbial Genetics Microbial Ecology Mycology diazotroph nifH cyanobacteria heterotrophic bacteria climate change primary production marine polar Lisa W. von Friesen Lasse Riemann Table_1_Nitrogen Fixation in a Changing Arctic Ocean: An Overlooked Source of Nitrogen?.docx |
topic_facet |
Microbiology Microbial Genetics Microbial Ecology Mycology diazotroph nifH cyanobacteria heterotrophic bacteria climate change primary production marine polar |
description |
The Arctic Ocean is the smallest ocean on Earth, yet estimated to play a substantial role as a global carbon sink. As climate change is rapidly changing fundamental components of the Arctic, it is of local and global importance to understand and predict consequences for its carbon dynamics. Primary production in the Arctic Ocean is often nitrogen-limited, and this is predicted to increase in some regions. It is therefore of critical interest that biological nitrogen fixation, a process where some bacteria and archaea termed diazotrophs convert nitrogen gas to bioavailable ammonia, has now been detected in the Arctic Ocean. Several studies report diverse and active diazotrophs on various temporal and spatial scales across the Arctic Ocean. Their ecology and biogeochemical impact remain poorly known, and nitrogen fixation is so far absent from models of primary production in the Arctic Ocean. The composition of the diazotroph community appears distinct from other oceans – challenging paradigms of function and regulation of nitrogen fixation. There is evidence of both symbiotic cyanobacterial nitrogen fixation and heterotrophic diazotrophy, but large regions are not yet sampled, and the sparse quantitative data hamper conclusive insights. Hence, it remains to be determined to what extent nitrogen fixation represents a hitherto overlooked source of new nitrogen to consider when predicting future productivity of the Arctic Ocean. Here, we discuss current knowledge on diazotroph distribution, composition, and activity in pelagic and sea ice-associated environments of the Arctic Ocean. Based on this, we identify gaps and outline pertinent research questions in the context of a climate change-influenced Arctic Ocean – with the aim of guiding and encouraging future research on nitrogen fixation in this region. |
format |
Dataset |
author |
Lisa W. von Friesen Lasse Riemann |
author_facet |
Lisa W. von Friesen Lasse Riemann |
author_sort |
Lisa W. von Friesen |
title |
Table_1_Nitrogen Fixation in a Changing Arctic Ocean: An Overlooked Source of Nitrogen?.docx |
title_short |
Table_1_Nitrogen Fixation in a Changing Arctic Ocean: An Overlooked Source of Nitrogen?.docx |
title_full |
Table_1_Nitrogen Fixation in a Changing Arctic Ocean: An Overlooked Source of Nitrogen?.docx |
title_fullStr |
Table_1_Nitrogen Fixation in a Changing Arctic Ocean: An Overlooked Source of Nitrogen?.docx |
title_full_unstemmed |
Table_1_Nitrogen Fixation in a Changing Arctic Ocean: An Overlooked Source of Nitrogen?.docx |
title_sort |
table_1_nitrogen fixation in a changing arctic ocean: an overlooked source of nitrogen?.docx |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmicb.2020.596426.s001 https://figshare.com/articles/dataset/Table_1_Nitrogen_Fixation_in_a_Changing_Arctic_Ocean_An_Overlooked_Source_of_Nitrogen_docx/13420052 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Sea ice |
op_relation |
doi:10.3389/fmicb.2020.596426.s001 https://figshare.com/articles/dataset/Table_1_Nitrogen_Fixation_in_a_Changing_Arctic_Ocean_An_Overlooked_Source_of_Nitrogen_docx/13420052 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmicb.2020.596426.s001 |
_version_ |
1766306744062967808 |