Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw
It has been shown that reactive soil minerals, specifically iron(III) (oxyhydr)oxides, can trap organic carbon in soils overlying intact permafrost, and may limit carbon mobilization and degradation as it is observed in other environments. However, the use of iron(III)-bearing minerals as terminal e...
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Online Access: | http://www.osti.gov/servlets/purl/1816797 https://www.osti.gov/biblio/1816797 https://doi.org/10.1038/s41467-020-20102-6 |
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ftosti:oai:osti.gov:1816797 2023-07-30T03:55:22+02:00 Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw Patzner, Monique S. Mueller, Carsten W. Malusova, Miroslava Baur, Moritz Nikeleit, Verena Scholten, Thomas Univ. of Tubingen . Chair of Soil Science and Geomorphology Hoeschen, Carmen Technische Univ. Munchen, Freising . Chair of Soil Science Byrne, James M. Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology; Bristol Univ. . School of Earth Sciences Borch, Thomas Colorado State Univ., Fort Collins, CO . Dept. of Soil & Crop Sciences. Dept. of Chemistry Kappler, Andreas Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology Bryce, Casey Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology; Bristol Univ. . School of Earth Sciences 2022-10-06 application/pdf http://www.osti.gov/servlets/purl/1816797 https://www.osti.gov/biblio/1816797 https://doi.org/10.1038/s41467-020-20102-6 unknown http://www.osti.gov/servlets/purl/1816797 https://www.osti.gov/biblio/1816797 https://doi.org/10.1038/s41467-020-20102-6 doi:10.1038/s41467-020-20102-6 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY 2022 ftosti https://doi.org/10.1038/s41467-020-20102-6 2023-07-11T10:06:30Z It has been shown that reactive soil minerals, specifically iron(III) (oxyhydr)oxides, can trap organic carbon in soils overlying intact permafrost, and may limit carbon mobilization and degradation as it is observed in other environments. However, the use of iron(III)-bearing minerals as terminal electron acceptors in permafrost environments, and thus their stability and capacity to prevent carbon mobilization during permafrost thaw, is poorly understood. We have followed the dynamic interactions between iron and carbon using a space-for-time approach across a thaw gradient in Abisko (Sweden), where wetlands are expanding rapidly due to permafrost thaw. We show through bulk (selective extractions, EXAFS) and nanoscale analysis (correlative SEM and nanoSIMS) that organic carbon is bound to reactive Fe primarily in the transition between organic and mineral horizons in palsa underlain by intact permafrost (41.8 ±10.8 mg carbon per g soil, 9.9 to 14.8% of total soil organic carbon). During permafrost thaw, water-logging and O 2 limitation lead to reducing conditions and an increase in abundance of Fe(III)-reducing bacteria which favor mineral dissolution and drive mobilization of both iron and carbon along the thaw gradient. By providing a terminal electron acceptor, this rusty carbon sink is effectively destroyed along the thaw gradient and cannot prevent carbon release with thaw. Other/Unknown Material Abisko palsa permafrost SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Abisko ENVELOPE(18.829,18.829,68.349,68.349) Nature Communications 11 1 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY Patzner, Monique S. Mueller, Carsten W. Malusova, Miroslava Baur, Moritz Nikeleit, Verena Scholten, Thomas Univ. of Tubingen . Chair of Soil Science and Geomorphology Hoeschen, Carmen Technische Univ. Munchen, Freising . Chair of Soil Science Byrne, James M. Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology; Bristol Univ. . School of Earth Sciences Borch, Thomas Colorado State Univ., Fort Collins, CO . Dept. of Soil & Crop Sciences. Dept. of Chemistry Kappler, Andreas Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology Bryce, Casey Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology; Bristol Univ. . School of Earth Sciences Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY |
description |
It has been shown that reactive soil minerals, specifically iron(III) (oxyhydr)oxides, can trap organic carbon in soils overlying intact permafrost, and may limit carbon mobilization and degradation as it is observed in other environments. However, the use of iron(III)-bearing minerals as terminal electron acceptors in permafrost environments, and thus their stability and capacity to prevent carbon mobilization during permafrost thaw, is poorly understood. We have followed the dynamic interactions between iron and carbon using a space-for-time approach across a thaw gradient in Abisko (Sweden), where wetlands are expanding rapidly due to permafrost thaw. We show through bulk (selective extractions, EXAFS) and nanoscale analysis (correlative SEM and nanoSIMS) that organic carbon is bound to reactive Fe primarily in the transition between organic and mineral horizons in palsa underlain by intact permafrost (41.8 ±10.8 mg carbon per g soil, 9.9 to 14.8% of total soil organic carbon). During permafrost thaw, water-logging and O 2 limitation lead to reducing conditions and an increase in abundance of Fe(III)-reducing bacteria which favor mineral dissolution and drive mobilization of both iron and carbon along the thaw gradient. By providing a terminal electron acceptor, this rusty carbon sink is effectively destroyed along the thaw gradient and cannot prevent carbon release with thaw. |
author |
Patzner, Monique S. Mueller, Carsten W. Malusova, Miroslava Baur, Moritz Nikeleit, Verena Scholten, Thomas Univ. of Tubingen . Chair of Soil Science and Geomorphology Hoeschen, Carmen Technische Univ. Munchen, Freising . Chair of Soil Science Byrne, James M. Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology; Bristol Univ. . School of Earth Sciences Borch, Thomas Colorado State Univ., Fort Collins, CO . Dept. of Soil & Crop Sciences. Dept. of Chemistry Kappler, Andreas Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology Bryce, Casey Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology; Bristol Univ. . School of Earth Sciences |
author_facet |
Patzner, Monique S. Mueller, Carsten W. Malusova, Miroslava Baur, Moritz Nikeleit, Verena Scholten, Thomas Univ. of Tubingen . Chair of Soil Science and Geomorphology Hoeschen, Carmen Technische Univ. Munchen, Freising . Chair of Soil Science Byrne, James M. Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology; Bristol Univ. . School of Earth Sciences Borch, Thomas Colorado State Univ., Fort Collins, CO . Dept. of Soil & Crop Sciences. Dept. of Chemistry Kappler, Andreas Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology Bryce, Casey Univ. of Tubingen . Center for Applied Geosciences. Geomicrobiology; Bristol Univ. . School of Earth Sciences |
author_sort |
Patzner, Monique S. |
title |
Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw |
title_short |
Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw |
title_full |
Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw |
title_fullStr |
Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw |
title_full_unstemmed |
Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw |
title_sort |
iron mineral dissolution releases iron and associated organic carbon during permafrost thaw |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1816797 https://www.osti.gov/biblio/1816797 https://doi.org/10.1038/s41467-020-20102-6 |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) |
geographic |
Abisko |
geographic_facet |
Abisko |
genre |
Abisko palsa permafrost |
genre_facet |
Abisko palsa permafrost |
op_relation |
http://www.osti.gov/servlets/purl/1816797 https://www.osti.gov/biblio/1816797 https://doi.org/10.1038/s41467-020-20102-6 doi:10.1038/s41467-020-20102-6 |
op_doi |
https://doi.org/10.1038/s41467-020-20102-6 |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
_version_ |
1772816694607085568 |