Dramatic Carbon Loss in a Permafrost Thaw Slump in the Tibetan Plateau is Dominated by the Loss of Microbial Necromass Carbon
Thaw slumps can lead to considerable carbon loss in permafrost regions, while the loss of components from two major origins, i.e., microbial and plant-derived carbon, during this process remains poorly understood. Here, we provide direct evidence that microbial necromass carbon is a major component...
Published in: | Environmental Science & Technology |
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2023
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Online Access: | https://publications.rifs-potsdam.de/pubman/item/item_6002870 |
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ftiasspotsdam:oai:iasspublic.gfz-potsdam.de:item_6002870 2024-01-21T10:09:31+01:00 Dramatic Carbon Loss in a Permafrost Thaw Slump in the Tibetan Plateau is Dominated by the Loss of Microbial Necromass Carbon Zhou, W. Ma, T. Yin, X. Wu, X. Li, Q. Rupakheti, D. Xiong, X. Zhang, Q. Mu, C. de Foy, B. Rupakheti, M. Kang, S. Qin, D. 2023-05 https://publications.rifs-potsdam.de/pubman/item/item_6002870 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.est.2c07274 https://publications.rifs-potsdam.de/pubman/item/item_6002870 Environmental science & technology info:eu-repo/semantics/article 2023 ftiasspotsdam https://doi.org/10.1021/acs.est.2c07274 2023-12-24T23:35:27Z Thaw slumps can lead to considerable carbon loss in permafrost regions, while the loss of components from two major origins, i.e., microbial and plant-derived carbon, during this process remains poorly understood. Here, we provide direct evidence that microbial necromass carbon is a major component of lost carbon in a retrogressive permafrost thaw slump by analyzing soil organic carbon (SOC), biomarkers (amino sugars and lignin phenols), and soil environmental variables in a typical permafrost thaw slump in the Tibetan Plateau. The retrogressive thaw slump led to a ∼61% decrease in SOC and a ∼25% SOC stock loss. As evident in the levels of amino sugars (average of 55.92 ± 18.79 mg g–1 of organic carbon, OC) and lignin phenols (average of 15.00 ± 8.05 mg g–1 OC), microbial-derived carbon (microbial necromass carbon) was the major component of the SOC loss, accounting for ∼54% of the SOC loss in the permafrost thaw slump. The variation of amino sugars was mainly related to the changes in soil moisture, pH, and plant input, while changes in lignin phenols were mainly related to the changes in soil moisture and soil bulk density. Article in Journal/Newspaper permafrost Publication Database IASS (Institute for Advanced Sustainability Studies Potsdam) Environmental Science & Technology 57 17 6910 6921 |
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Open Polar |
collection |
Publication Database IASS (Institute for Advanced Sustainability Studies Potsdam) |
op_collection_id |
ftiasspotsdam |
language |
English |
description |
Thaw slumps can lead to considerable carbon loss in permafrost regions, while the loss of components from two major origins, i.e., microbial and plant-derived carbon, during this process remains poorly understood. Here, we provide direct evidence that microbial necromass carbon is a major component of lost carbon in a retrogressive permafrost thaw slump by analyzing soil organic carbon (SOC), biomarkers (amino sugars and lignin phenols), and soil environmental variables in a typical permafrost thaw slump in the Tibetan Plateau. The retrogressive thaw slump led to a ∼61% decrease in SOC and a ∼25% SOC stock loss. As evident in the levels of amino sugars (average of 55.92 ± 18.79 mg g–1 of organic carbon, OC) and lignin phenols (average of 15.00 ± 8.05 mg g–1 OC), microbial-derived carbon (microbial necromass carbon) was the major component of the SOC loss, accounting for ∼54% of the SOC loss in the permafrost thaw slump. The variation of amino sugars was mainly related to the changes in soil moisture, pH, and plant input, while changes in lignin phenols were mainly related to the changes in soil moisture and soil bulk density. |
format |
Article in Journal/Newspaper |
author |
Zhou, W. Ma, T. Yin, X. Wu, X. Li, Q. Rupakheti, D. Xiong, X. Zhang, Q. Mu, C. de Foy, B. Rupakheti, M. Kang, S. Qin, D. |
spellingShingle |
Zhou, W. Ma, T. Yin, X. Wu, X. Li, Q. Rupakheti, D. Xiong, X. Zhang, Q. Mu, C. de Foy, B. Rupakheti, M. Kang, S. Qin, D. Dramatic Carbon Loss in a Permafrost Thaw Slump in the Tibetan Plateau is Dominated by the Loss of Microbial Necromass Carbon |
author_facet |
Zhou, W. Ma, T. Yin, X. Wu, X. Li, Q. Rupakheti, D. Xiong, X. Zhang, Q. Mu, C. de Foy, B. Rupakheti, M. Kang, S. Qin, D. |
author_sort |
Zhou, W. |
title |
Dramatic Carbon Loss in a Permafrost Thaw Slump in the Tibetan Plateau is Dominated by the Loss of Microbial Necromass Carbon |
title_short |
Dramatic Carbon Loss in a Permafrost Thaw Slump in the Tibetan Plateau is Dominated by the Loss of Microbial Necromass Carbon |
title_full |
Dramatic Carbon Loss in a Permafrost Thaw Slump in the Tibetan Plateau is Dominated by the Loss of Microbial Necromass Carbon |
title_fullStr |
Dramatic Carbon Loss in a Permafrost Thaw Slump in the Tibetan Plateau is Dominated by the Loss of Microbial Necromass Carbon |
title_full_unstemmed |
Dramatic Carbon Loss in a Permafrost Thaw Slump in the Tibetan Plateau is Dominated by the Loss of Microbial Necromass Carbon |
title_sort |
dramatic carbon loss in a permafrost thaw slump in the tibetan plateau is dominated by the loss of microbial necromass carbon |
publishDate |
2023 |
url |
https://publications.rifs-potsdam.de/pubman/item/item_6002870 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Environmental science & technology |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.est.2c07274 https://publications.rifs-potsdam.de/pubman/item/item_6002870 |
op_doi |
https://doi.org/10.1021/acs.est.2c07274 |
container_title |
Environmental Science & Technology |
container_volume |
57 |
container_issue |
17 |
container_start_page |
6910 |
op_container_end_page |
6921 |
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