Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra
Climate warming can result in both abiotic (e.g., permafrost thaw) and biotic (e.g., microbial functional genes) changes in Arctic tundra. Recent research has incorporated dynamic permafrost thaw in Earth system models (ESMs) and indicates that Arctic tundra could be a significant future carbon (C)...
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Online Access: | http://www.osti.gov/servlets/purl/1855183 https://www.osti.gov/biblio/1855183 https://doi.org/10.1111/gcb.14325 |
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ftosti:oai:osti.gov:1855183 2023-07-30T04:01:22+02:00 Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra Liang, Junyi Xia, Jiangyang Shi, Zheng Jiang, Lifen Ma, Shuang Lu, Xingjie Mauritz, Marguerite Natali, Susan M. Pegoraro, Elaine Penton, Christopher Ryan Plaza, César Salmon, Verity G. Celis, Gerardo Cole, James R. Konstantinidis, Konstantinos T. Tiedje, James M. Zhou, Jizhong Schuur, Edward G. Luo, Yiqi 2023-07-10 application/pdf http://www.osti.gov/servlets/purl/1855183 https://www.osti.gov/biblio/1855183 https://doi.org/10.1111/gcb.14325 unknown http://www.osti.gov/servlets/purl/1855183 https://www.osti.gov/biblio/1855183 https://doi.org/10.1111/gcb.14325 doi:10.1111/gcb.14325 2023 ftosti https://doi.org/10.1111/gcb.14325 2023-07-11T10:11:08Z Climate warming can result in both abiotic (e.g., permafrost thaw) and biotic (e.g., microbial functional genes) changes in Arctic tundra. Recent research has incorporated dynamic permafrost thaw in Earth system models (ESMs) and indicates that Arctic tundra could be a significant future carbon (C) source due to the enhanced decomposition of thawed deep soil C. However, warming-induced biotic changes may influence biologically related parameters and the consequent projections in ESMs. How model parameters associated with biotic responses will change under warming and to what extent these changes affect projected C budgets have not been carefully examined. In this study, we synthesized six data sets over 5years from a soil warming experiment at the Eight Mile Lake, Alaska, into the Terrestrial ECOsystem (TECO) model with a probabilistic inversion approach. The TECO model used multiple soil layers to track dynamics of thawed soil under different treatments. Our results show that warming increased light use efficiency of vegetation photosynthesis but decreased baseline (i.e., environment-corrected) turnover rates of SOC in both the fast and slow pools in comparison with those under control. Moreover, the parameter changes generally amplified over time, suggesting processes of gradual physiological acclimation and functional gene shifts of both plants and microbes. The TECO model predicted that field warming from 2009 to 2013 resulted in cumulative C losses of 224 or 87g/m2 , respectively, without or with changes in those parameters. Thus, warming-induced parameter changes reduced predicted soil C loss by 61%. Our study suggests that it is critical to incorporate biotic changes in ESMs to improve the model performance in predicting C dynamics in permafrost regions. Other/Unknown Material Arctic permafrost Tundra Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Global Change Biology 24 10 4946 4959 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
description |
Climate warming can result in both abiotic (e.g., permafrost thaw) and biotic (e.g., microbial functional genes) changes in Arctic tundra. Recent research has incorporated dynamic permafrost thaw in Earth system models (ESMs) and indicates that Arctic tundra could be a significant future carbon (C) source due to the enhanced decomposition of thawed deep soil C. However, warming-induced biotic changes may influence biologically related parameters and the consequent projections in ESMs. How model parameters associated with biotic responses will change under warming and to what extent these changes affect projected C budgets have not been carefully examined. In this study, we synthesized six data sets over 5years from a soil warming experiment at the Eight Mile Lake, Alaska, into the Terrestrial ECOsystem (TECO) model with a probabilistic inversion approach. The TECO model used multiple soil layers to track dynamics of thawed soil under different treatments. Our results show that warming increased light use efficiency of vegetation photosynthesis but decreased baseline (i.e., environment-corrected) turnover rates of SOC in both the fast and slow pools in comparison with those under control. Moreover, the parameter changes generally amplified over time, suggesting processes of gradual physiological acclimation and functional gene shifts of both plants and microbes. The TECO model predicted that field warming from 2009 to 2013 resulted in cumulative C losses of 224 or 87g/m2 , respectively, without or with changes in those parameters. Thus, warming-induced parameter changes reduced predicted soil C loss by 61%. Our study suggests that it is critical to incorporate biotic changes in ESMs to improve the model performance in predicting C dynamics in permafrost regions. |
author |
Liang, Junyi Xia, Jiangyang Shi, Zheng Jiang, Lifen Ma, Shuang Lu, Xingjie Mauritz, Marguerite Natali, Susan M. Pegoraro, Elaine Penton, Christopher Ryan Plaza, César Salmon, Verity G. Celis, Gerardo Cole, James R. Konstantinidis, Konstantinos T. Tiedje, James M. Zhou, Jizhong Schuur, Edward G. Luo, Yiqi |
spellingShingle |
Liang, Junyi Xia, Jiangyang Shi, Zheng Jiang, Lifen Ma, Shuang Lu, Xingjie Mauritz, Marguerite Natali, Susan M. Pegoraro, Elaine Penton, Christopher Ryan Plaza, César Salmon, Verity G. Celis, Gerardo Cole, James R. Konstantinidis, Konstantinos T. Tiedje, James M. Zhou, Jizhong Schuur, Edward G. Luo, Yiqi Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra |
author_facet |
Liang, Junyi Xia, Jiangyang Shi, Zheng Jiang, Lifen Ma, Shuang Lu, Xingjie Mauritz, Marguerite Natali, Susan M. Pegoraro, Elaine Penton, Christopher Ryan Plaza, César Salmon, Verity G. Celis, Gerardo Cole, James R. Konstantinidis, Konstantinos T. Tiedje, James M. Zhou, Jizhong Schuur, Edward G. Luo, Yiqi |
author_sort |
Liang, Junyi |
title |
Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra |
title_short |
Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra |
title_full |
Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra |
title_fullStr |
Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra |
title_full_unstemmed |
Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra |
title_sort |
biotic responses buffer warming-induced soil organic carbon loss in arctic tundra |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1855183 https://www.osti.gov/biblio/1855183 https://doi.org/10.1111/gcb.14325 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Tundra Alaska |
genre_facet |
Arctic permafrost Tundra Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1855183 https://www.osti.gov/biblio/1855183 https://doi.org/10.1111/gcb.14325 doi:10.1111/gcb.14325 |
op_doi |
https://doi.org/10.1111/gcb.14325 |
container_title |
Global Change Biology |
container_volume |
24 |
container_issue |
10 |
container_start_page |
4946 |
op_container_end_page |
4959 |
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1772812109534461952 |