Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf
Abstract Recent recession of the Larsen Ice Shelf C has revealed microbial alterations of illite in marine sediments, a process typically thought to occur during low-grade metamorphism. In situ breakdown of illite provides a previously-unobserved pathway for the release of dissolved Fe 2+ to porewat...
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Online Access: | http://dx.doi.org/10.1038/s41467-019-13741-x http://www.nature.com/articles/s41467-019-13741-x.pdf http://www.nature.com/articles/s41467-019-13741-x |
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crspringernat:10.1038/s41467-019-13741-x 2023-05-15T14:08:30+02:00 Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf Jung, Jaewoo Yoo, Kyu-Cheul Rosenheim, Brad E. Conway, Tim M. Lee, Jae Il Yoon, Ho Il Hwang, Chung Yeon Yang, Kiho Subt, Christina Kim, Jinwook National Research Foundation of Korea Korea Polar Research Institute 2019 http://dx.doi.org/10.1038/s41467-019-13741-x http://www.nature.com/articles/s41467-019-13741-x.pdf http://www.nature.com/articles/s41467-019-13741-x en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Nature Communications volume 10, issue 1 ISSN 2041-1723 General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry journal-article 2019 crspringernat https://doi.org/10.1038/s41467-019-13741-x 2022-01-04T11:15:23Z Abstract Recent recession of the Larsen Ice Shelf C has revealed microbial alterations of illite in marine sediments, a process typically thought to occur during low-grade metamorphism. In situ breakdown of illite provides a previously-unobserved pathway for the release of dissolved Fe 2+ to porewaters, thus enhancing clay-rich Antarctic sub-ice shelf sediments as an important source of Fe to Fe-limited surface Southern Ocean waters during ice shelf retreat after the Last Glacial Maximum. When sediments are underneath the ice shelf, Fe 2+ from microbial reductive dissolution of illite/Fe-oxides may be exported to the water column. However, the initiation of an oxygenated, bioturbated sediment under receding ice shelves may oxidize Fe within surface porewaters, decreasing dissolved Fe 2+ export to the ocean. Thus, we identify another ice-sheet feedback intimately tied to iron biogeochemistry during climate transitions. Further constraints on the geographical extent of this process will impact our understanding of iron-carbon feedbacks during major deglaciations. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Larsen Ice Shelf Southern Ocean Springer Nature (via Crossref) Antarctic Larsen Ice Shelf ENVELOPE(-62.500,-62.500,-67.500,-67.500) Southern Ocean Nature Communications 10 1 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
spellingShingle |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry Jung, Jaewoo Yoo, Kyu-Cheul Rosenheim, Brad E. Conway, Tim M. Lee, Jae Il Yoon, Ho Il Hwang, Chung Yeon Yang, Kiho Subt, Christina Kim, Jinwook Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf |
topic_facet |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
description |
Abstract Recent recession of the Larsen Ice Shelf C has revealed microbial alterations of illite in marine sediments, a process typically thought to occur during low-grade metamorphism. In situ breakdown of illite provides a previously-unobserved pathway for the release of dissolved Fe 2+ to porewaters, thus enhancing clay-rich Antarctic sub-ice shelf sediments as an important source of Fe to Fe-limited surface Southern Ocean waters during ice shelf retreat after the Last Glacial Maximum. When sediments are underneath the ice shelf, Fe 2+ from microbial reductive dissolution of illite/Fe-oxides may be exported to the water column. However, the initiation of an oxygenated, bioturbated sediment under receding ice shelves may oxidize Fe within surface porewaters, decreasing dissolved Fe 2+ export to the ocean. Thus, we identify another ice-sheet feedback intimately tied to iron biogeochemistry during climate transitions. Further constraints on the geographical extent of this process will impact our understanding of iron-carbon feedbacks during major deglaciations. |
author2 |
National Research Foundation of Korea Korea Polar Research Institute |
format |
Article in Journal/Newspaper |
author |
Jung, Jaewoo Yoo, Kyu-Cheul Rosenheim, Brad E. Conway, Tim M. Lee, Jae Il Yoon, Ho Il Hwang, Chung Yeon Yang, Kiho Subt, Christina Kim, Jinwook |
author_facet |
Jung, Jaewoo Yoo, Kyu-Cheul Rosenheim, Brad E. Conway, Tim M. Lee, Jae Il Yoon, Ho Il Hwang, Chung Yeon Yang, Kiho Subt, Christina Kim, Jinwook |
author_sort |
Jung, Jaewoo |
title |
Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf |
title_short |
Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf |
title_full |
Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf |
title_fullStr |
Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf |
title_full_unstemmed |
Microbial Fe(III) reduction as a potential iron source from Holocene sediments beneath Larsen Ice Shelf |
title_sort |
microbial fe(iii) reduction as a potential iron source from holocene sediments beneath larsen ice shelf |
publisher |
Springer Science and Business Media LLC |
publishDate |
2019 |
url |
http://dx.doi.org/10.1038/s41467-019-13741-x http://www.nature.com/articles/s41467-019-13741-x.pdf http://www.nature.com/articles/s41467-019-13741-x |
long_lat |
ENVELOPE(-62.500,-62.500,-67.500,-67.500) |
geographic |
Antarctic Larsen Ice Shelf Southern Ocean |
geographic_facet |
Antarctic Larsen Ice Shelf Southern Ocean |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Larsen Ice Shelf Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Larsen Ice Shelf Southern Ocean |
op_source |
Nature Communications volume 10, issue 1 ISSN 2041-1723 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-019-13741-x |
container_title |
Nature Communications |
container_volume |
10 |
container_issue |
1 |
_version_ |
1766280521788162048 |