Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean
Biological dinitrogen (N2) fixation is an important source of nitrogen (N) in low-latitude open oceans. The unusual N2-fixing unicellular cyanobacteria (UCYN-A)/haptophyte symbiosis has been found in an increasing number of unexpected environments, including northern waters of the Danish Straight an...
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ftcdlib:oai:escholarship.org:ark:/13030/qt9kw5p3n8 2023-10-01T03:52:54+02:00 Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean Harding, Katie Turk-Kubo, Kendra A Sipler, Rachel E Mills, Matthew M Bronk, Deborah A Zehr, Jonathan P 13371 - 13375 2018-12-26 application/pdf https://escholarship.org/uc/item/9kw5p3n8 unknown eScholarship, University of California qt9kw5p3n8 https://escholarship.org/uc/item/9kw5p3n8 public Proceedings of the National Academy of Sciences of the United States of America, vol 115, iss 52 Climate Action Arctic Regions Cyanobacteria Haptophyta Nitrogen Nitrogen Fixation Oceans and Seas Seawater Symbiosis marine microbiology Arctic nanoSIMS article 2018 ftcdlib 2023-09-04T18:02:57Z Biological dinitrogen (N2) fixation is an important source of nitrogen (N) in low-latitude open oceans. The unusual N2-fixing unicellular cyanobacteria (UCYN-A)/haptophyte symbiosis has been found in an increasing number of unexpected environments, including northern waters of the Danish Straight and Bering and Chukchi Seas. We used nanoscale secondary ion mass spectrometry (nanoSIMS) to measure 15N2 uptake into UCYN-A/haptophyte symbiosis and found that UCYN-A strains identical to low-latitude strains are fixing N2 in the Bering and Chukchi Seas, at rates comparable to subtropical waters. These results show definitively that cyanobacterial N2 fixation is not constrained to subtropical waters, challenging paradigms and models of global N2 fixation. The Arctic is particularly sensitive to climate change, and N2 fixation may increase in Arctic waters under future climate scenarios. Article in Journal/Newspaper Arctic Arctic Ocean Chukchi Climate change University of California: eScholarship Arctic Arctic Ocean |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Arctic Regions Cyanobacteria Haptophyta Nitrogen Nitrogen Fixation Oceans and Seas Seawater Symbiosis marine microbiology Arctic nanoSIMS |
spellingShingle |
Climate Action Arctic Regions Cyanobacteria Haptophyta Nitrogen Nitrogen Fixation Oceans and Seas Seawater Symbiosis marine microbiology Arctic nanoSIMS Harding, Katie Turk-Kubo, Kendra A Sipler, Rachel E Mills, Matthew M Bronk, Deborah A Zehr, Jonathan P Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean |
topic_facet |
Climate Action Arctic Regions Cyanobacteria Haptophyta Nitrogen Nitrogen Fixation Oceans and Seas Seawater Symbiosis marine microbiology Arctic nanoSIMS |
description |
Biological dinitrogen (N2) fixation is an important source of nitrogen (N) in low-latitude open oceans. The unusual N2-fixing unicellular cyanobacteria (UCYN-A)/haptophyte symbiosis has been found in an increasing number of unexpected environments, including northern waters of the Danish Straight and Bering and Chukchi Seas. We used nanoscale secondary ion mass spectrometry (nanoSIMS) to measure 15N2 uptake into UCYN-A/haptophyte symbiosis and found that UCYN-A strains identical to low-latitude strains are fixing N2 in the Bering and Chukchi Seas, at rates comparable to subtropical waters. These results show definitively that cyanobacterial N2 fixation is not constrained to subtropical waters, challenging paradigms and models of global N2 fixation. The Arctic is particularly sensitive to climate change, and N2 fixation may increase in Arctic waters under future climate scenarios. |
format |
Article in Journal/Newspaper |
author |
Harding, Katie Turk-Kubo, Kendra A Sipler, Rachel E Mills, Matthew M Bronk, Deborah A Zehr, Jonathan P |
author_facet |
Harding, Katie Turk-Kubo, Kendra A Sipler, Rachel E Mills, Matthew M Bronk, Deborah A Zehr, Jonathan P |
author_sort |
Harding, Katie |
title |
Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean |
title_short |
Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean |
title_full |
Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean |
title_fullStr |
Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean |
title_full_unstemmed |
Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean |
title_sort |
symbiotic unicellular cyanobacteria fix nitrogen in the arctic ocean |
publisher |
eScholarship, University of California |
publishDate |
2018 |
url |
https://escholarship.org/uc/item/9kw5p3n8 |
op_coverage |
13371 - 13375 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Chukchi Climate change |
genre_facet |
Arctic Arctic Ocean Chukchi Climate change |
op_source |
Proceedings of the National Academy of Sciences of the United States of America, vol 115, iss 52 |
op_relation |
qt9kw5p3n8 https://escholarship.org/uc/item/9kw5p3n8 |
op_rights |
public |
_version_ |
1778519138030845952 |