Distinct iron cycling in a Southern Ocean eddy
Mesoscale eddies are ubiquitous in the iron-limited Southern Ocean, controlling ocean-atmosphere exchange processes, however their influence on phytoplankton productivity remains unknown. Here we probed the biogeochemical cycling of iron (Fe) in a cold-core eddy. In-eddy surface dissolved Fe (dFe) c...
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ftpubmed:oai:pubmedcentral.nih.gov:7012851 2023-05-15T18:24:25+02:00 Distinct iron cycling in a Southern Ocean eddy Ellwood, Michael J. Strzepek, Robert F. Strutton, Peter G. Trull, Thomas W. Fourquez, Marion Boyd, Philip W. 2020-02-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7012851/ http://www.ncbi.nlm.nih.gov/pubmed/32047154 https://doi.org/10.1038/s41467-020-14464-0 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7012851/ http://www.ncbi.nlm.nih.gov/pubmed/32047154 http://dx.doi.org/10.1038/s41467-020-14464-0 © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2020 ftpubmed https://doi.org/10.1038/s41467-020-14464-0 2020-02-16T01:34:20Z Mesoscale eddies are ubiquitous in the iron-limited Southern Ocean, controlling ocean-atmosphere exchange processes, however their influence on phytoplankton productivity remains unknown. Here we probed the biogeochemical cycling of iron (Fe) in a cold-core eddy. In-eddy surface dissolved Fe (dFe) concentrations and phytoplankton productivity were exceedingly low relative to external waters. In-eddy phytoplankton Fe-to-carbon uptake ratios were elevated 2–6 fold, indicating upregulated intracellular Fe acquisition resulting in a dFe residence time of ~1 day. Heavy dFe isotope values were measured for in-eddy surface waters highlighting extensive trafficking of dFe by cells. Below the euphotic zone, dFe isotope values were lighter and coincident with peaks in recycled nutrients and cell abundance, indicating enhanced microbially-mediated Fe recycling. Our measurements show that the isolated nature of Southern Ocean eddies can produce distinctly different Fe biogeochemistry compared to surrounding waters with cells upregulating iron uptake and using recycling processes to sustain themselves. Text Southern Ocean PubMed Central (PMC) Southern Ocean Nature Communications 11 1 |
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Article Ellwood, Michael J. Strzepek, Robert F. Strutton, Peter G. Trull, Thomas W. Fourquez, Marion Boyd, Philip W. Distinct iron cycling in a Southern Ocean eddy |
topic_facet |
Article |
description |
Mesoscale eddies are ubiquitous in the iron-limited Southern Ocean, controlling ocean-atmosphere exchange processes, however their influence on phytoplankton productivity remains unknown. Here we probed the biogeochemical cycling of iron (Fe) in a cold-core eddy. In-eddy surface dissolved Fe (dFe) concentrations and phytoplankton productivity were exceedingly low relative to external waters. In-eddy phytoplankton Fe-to-carbon uptake ratios were elevated 2–6 fold, indicating upregulated intracellular Fe acquisition resulting in a dFe residence time of ~1 day. Heavy dFe isotope values were measured for in-eddy surface waters highlighting extensive trafficking of dFe by cells. Below the euphotic zone, dFe isotope values were lighter and coincident with peaks in recycled nutrients and cell abundance, indicating enhanced microbially-mediated Fe recycling. Our measurements show that the isolated nature of Southern Ocean eddies can produce distinctly different Fe biogeochemistry compared to surrounding waters with cells upregulating iron uptake and using recycling processes to sustain themselves. |
format |
Text |
author |
Ellwood, Michael J. Strzepek, Robert F. Strutton, Peter G. Trull, Thomas W. Fourquez, Marion Boyd, Philip W. |
author_facet |
Ellwood, Michael J. Strzepek, Robert F. Strutton, Peter G. Trull, Thomas W. Fourquez, Marion Boyd, Philip W. |
author_sort |
Ellwood, Michael J. |
title |
Distinct iron cycling in a Southern Ocean eddy |
title_short |
Distinct iron cycling in a Southern Ocean eddy |
title_full |
Distinct iron cycling in a Southern Ocean eddy |
title_fullStr |
Distinct iron cycling in a Southern Ocean eddy |
title_full_unstemmed |
Distinct iron cycling in a Southern Ocean eddy |
title_sort |
distinct iron cycling in a southern ocean eddy |
publisher |
Nature Publishing Group UK |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7012851/ http://www.ncbi.nlm.nih.gov/pubmed/32047154 https://doi.org/10.1038/s41467-020-14464-0 |
geographic |
Southern Ocean |
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Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7012851/ http://www.ncbi.nlm.nih.gov/pubmed/32047154 http://dx.doi.org/10.1038/s41467-020-14464-0 |
op_rights |
© The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
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CC-BY |
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https://doi.org/10.1038/s41467-020-14464-0 |
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Nature Communications |
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11 |
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1 |
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