Chasing iron bioavailability in the Southern Ocean: Insights from Phaeocystis antarctica and iron speciation
Dissolved iron (dFe) availability limits the uptake of atmospheric CO(2) by the Southern Ocean (SO) biological pump. Hence, any change in bioavailable dFe in this region can directly influence climate. On the basis of Fe uptake experiments with Phaeocystis antarctica, we show that the range of dFe b...
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ftpubmed:oai:pubmedcentral.nih.gov:10306294 2023-07-23T04:14:36+02:00 Chasing iron bioavailability in the Southern Ocean: Insights from Phaeocystis antarctica and iron speciation Fourquez, Marion Janssen, David J. Conway, Tim M. Cabanes, Damien Ellwood, Michael J. Sieber, Matthias Trimborn, Scarlett Hassler, Christel 2023-06-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306294/ https://doi.org/10.1126/sciadv.adf9696 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306294/ http://dx.doi.org/10.1126/sciadv.adf9696 Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. Sci Adv Earth Environmental Ecological and Space Sciences Text 2023 ftpubmed https://doi.org/10.1126/sciadv.adf9696 2023-07-02T01:30:06Z Dissolved iron (dFe) availability limits the uptake of atmospheric CO(2) by the Southern Ocean (SO) biological pump. Hence, any change in bioavailable dFe in this region can directly influence climate. On the basis of Fe uptake experiments with Phaeocystis antarctica, we show that the range of dFe bioavailability in natural samples is wider (<1 to ~200% compared to free inorganic Fe′) than previously thought, with higher bioavailability found near glacial sources. The degree of bioavailability varied regardless of in situ dFe concentration and depth, challenging the consensus that sole dFe concentrations can be used to predict Fe uptake in modeling studies. Further, our data suggest a disproportionately major role of biologically mediated ligands and encourage revisiting the role of humic substances in influencing marine Fe biogeochemical cycling in the SO. Last, we describe a linkage between in situ dFe bioavailability and isotopic signatures that, we anticipate, will stimulate future research. Text Antarc* Antarctica Southern Ocean PubMed Central (PMC) Southern Ocean Science Advances 9 26 |
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English |
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Earth Environmental Ecological and Space Sciences |
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Earth Environmental Ecological and Space Sciences Fourquez, Marion Janssen, David J. Conway, Tim M. Cabanes, Damien Ellwood, Michael J. Sieber, Matthias Trimborn, Scarlett Hassler, Christel Chasing iron bioavailability in the Southern Ocean: Insights from Phaeocystis antarctica and iron speciation |
topic_facet |
Earth Environmental Ecological and Space Sciences |
description |
Dissolved iron (dFe) availability limits the uptake of atmospheric CO(2) by the Southern Ocean (SO) biological pump. Hence, any change in bioavailable dFe in this region can directly influence climate. On the basis of Fe uptake experiments with Phaeocystis antarctica, we show that the range of dFe bioavailability in natural samples is wider (<1 to ~200% compared to free inorganic Fe′) than previously thought, with higher bioavailability found near glacial sources. The degree of bioavailability varied regardless of in situ dFe concentration and depth, challenging the consensus that sole dFe concentrations can be used to predict Fe uptake in modeling studies. Further, our data suggest a disproportionately major role of biologically mediated ligands and encourage revisiting the role of humic substances in influencing marine Fe biogeochemical cycling in the SO. Last, we describe a linkage between in situ dFe bioavailability and isotopic signatures that, we anticipate, will stimulate future research. |
format |
Text |
author |
Fourquez, Marion Janssen, David J. Conway, Tim M. Cabanes, Damien Ellwood, Michael J. Sieber, Matthias Trimborn, Scarlett Hassler, Christel |
author_facet |
Fourquez, Marion Janssen, David J. Conway, Tim M. Cabanes, Damien Ellwood, Michael J. Sieber, Matthias Trimborn, Scarlett Hassler, Christel |
author_sort |
Fourquez, Marion |
title |
Chasing iron bioavailability in the Southern Ocean: Insights from Phaeocystis antarctica and iron speciation |
title_short |
Chasing iron bioavailability in the Southern Ocean: Insights from Phaeocystis antarctica and iron speciation |
title_full |
Chasing iron bioavailability in the Southern Ocean: Insights from Phaeocystis antarctica and iron speciation |
title_fullStr |
Chasing iron bioavailability in the Southern Ocean: Insights from Phaeocystis antarctica and iron speciation |
title_full_unstemmed |
Chasing iron bioavailability in the Southern Ocean: Insights from Phaeocystis antarctica and iron speciation |
title_sort |
chasing iron bioavailability in the southern ocean: insights from phaeocystis antarctica and iron speciation |
publisher |
American Association for the Advancement of Science |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306294/ https://doi.org/10.1126/sciadv.adf9696 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306294/ http://dx.doi.org/10.1126/sciadv.adf9696 |
op_rights |
Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
op_doi |
https://doi.org/10.1126/sciadv.adf9696 |
container_title |
Science Advances |
container_volume |
9 |
container_issue |
26 |
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1772185976733433856 |