Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff
Iron supplied by glacial weathering results in pronounced hotspots of biological production in an otherwise iron-limited Southern Ocean Ecosystem. However, glacial iron inputs are thought to be dominated by icebergs. Here we show that surface runoff from three island groups of the maritime Antarctic...
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ftpubmed:oai:pubmedcentral.nih.gov:5316877 2023-05-15T13:52:44+02:00 Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff Hodson, Andy Nowak, Aga Sabacka, Marie Jungblut, Anne Navarro, Francisco Pearce, David Ávila-Jiménez, María Luisa Convey, Peter Vieira, Gonçalo 2017-02-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5316877/ http://www.ncbi.nlm.nih.gov/pubmed/28198359 https://doi.org/10.1038/ncomms14499 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5316877/ http://www.ncbi.nlm.nih.gov/pubmed/28198359 http://dx.doi.org/10.1038/ncomms14499 Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2017 ftpubmed https://doi.org/10.1038/ncomms14499 2017-03-05T01:25:13Z Iron supplied by glacial weathering results in pronounced hotspots of biological production in an otherwise iron-limited Southern Ocean Ecosystem. However, glacial iron inputs are thought to be dominated by icebergs. Here we show that surface runoff from three island groups of the maritime Antarctic exports more filterable (<0.45 μm) iron (6–81 kg km−2 a−1) than icebergs (0.0–1.2 kg km−2 a−1). Glacier-fed streams also export more acid-soluble iron (27.0–18,500 kg km−2 a−1) associated with suspended sediment than icebergs (0–241 kg km−2 a−1). Significant fluxes of filterable and sediment-derived iron (1–10 Gg a−1 and 100–1,000 Gg a−1, respectively) are therefore likely to be delivered by runoff from the Antarctic continent. Although estuarine removal processes will greatly reduce their availability to coastal ecosystems, our results clearly indicate that riverine iron fluxes need to be accounted for as the volume of Antarctic melt increases in response to 21st century climate change. Text Antarc* Antarctic Iceberg* Southern Ocean PubMed Central (PMC) Antarctic Southern Ocean The Antarctic Nature Communications 8 1 |
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Article Hodson, Andy Nowak, Aga Sabacka, Marie Jungblut, Anne Navarro, Francisco Pearce, David Ávila-Jiménez, María Luisa Convey, Peter Vieira, Gonçalo Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
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Iron supplied by glacial weathering results in pronounced hotspots of biological production in an otherwise iron-limited Southern Ocean Ecosystem. However, glacial iron inputs are thought to be dominated by icebergs. Here we show that surface runoff from three island groups of the maritime Antarctic exports more filterable (<0.45 μm) iron (6–81 kg km−2 a−1) than icebergs (0.0–1.2 kg km−2 a−1). Glacier-fed streams also export more acid-soluble iron (27.0–18,500 kg km−2 a−1) associated with suspended sediment than icebergs (0–241 kg km−2 a−1). Significant fluxes of filterable and sediment-derived iron (1–10 Gg a−1 and 100–1,000 Gg a−1, respectively) are therefore likely to be delivered by runoff from the Antarctic continent. Although estuarine removal processes will greatly reduce their availability to coastal ecosystems, our results clearly indicate that riverine iron fluxes need to be accounted for as the volume of Antarctic melt increases in response to 21st century climate change. |
format |
Text |
author |
Hodson, Andy Nowak, Aga Sabacka, Marie Jungblut, Anne Navarro, Francisco Pearce, David Ávila-Jiménez, María Luisa Convey, Peter Vieira, Gonçalo |
author_facet |
Hodson, Andy Nowak, Aga Sabacka, Marie Jungblut, Anne Navarro, Francisco Pearce, David Ávila-Jiménez, María Luisa Convey, Peter Vieira, Gonçalo |
author_sort |
Hodson, Andy |
title |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_short |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_full |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_fullStr |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_full_unstemmed |
Climatically sensitive transfer of iron to maritime Antarctic ecosystems by surface runoff |
title_sort |
climatically sensitive transfer of iron to maritime antarctic ecosystems by surface runoff |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5316877/ http://www.ncbi.nlm.nih.gov/pubmed/28198359 https://doi.org/10.1038/ncomms14499 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Iceberg* Southern Ocean |
genre_facet |
Antarc* Antarctic Iceberg* Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5316877/ http://www.ncbi.nlm.nih.gov/pubmed/28198359 http://dx.doi.org/10.1038/ncomms14499 |
op_rights |
Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms14499 |
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Nature Communications |
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8 |
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1 |
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1766257204282785792 |