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Soil organic carbon becomes newer under warming at a permafrost site on the Tibetan Plateau
Chang, Ruiying; Liu, Shuguang1; Chen, Leiyi2; Li, Na3,4; Bing, Haijian; Wang, Tao; Chen, Xiaopeng5; Li, Yang; Wang, Genxu
2021
发表期刊SOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
卷号152
摘要Permafrost areas are experiencing fast and dramatic changes under global warming. Increased primary production and stimulated microbial activity have been widely observed in warming permafrost. However, the fate of permafrost soil organic carbon (SOC) remains elusive, and the potential mechanisms underlying warmingmediated SOC formation and old C decomposition are poorly understood. Here, using in situ six-year manipulative warming experiments with two scenarios (+2.4 degrees C and +4.9 degrees C for lower and higher scenarios, respectively, above the ambient temperature) at a permafrost site in the Tibetan Plateau, we observed that soil C sink increased in the surface 5 cm layer under the two warming scenarios. SOC exhibited a linear increase with warming duration at rates of 6.8% and 6.4% annually in the silt & clay fractions and aggregates, respectively. Warming-induced accumulations of SOC in the aggregates and silt & clay fractions were contributed mainly by plant-derived C and minorly by microbial necromass. However, the increased input of new plant-derived C was accompanied with an increasing loss of old C via enhanced respiration under warming, likely due to the mobilization and degradation of C in the aggregates and silt & clay fractions. Our study provides field-based evidence of the enhanced SOC accumulation in the Tibetan permafrost regions under warming, and improves process-based understanding of warming-induced new plant-derived C that could replace the protected old C in the aggregates and silt & clay fractions.
关键词Amino sugars Delta C-14 Warming duration Permafrost Plant-derived carbon
学科领域Soil Science
DOI10.1016/j.soilbio.2020.108074
收录类别SCI
语种英语
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号WOS:000595644500013
出版者PERGAMON-ELSEVIER SCIENCE LTD
文献子类Article
出版地OXFORD
资助机构National Key Research and Development Program of China [2016YFC0502105] ; National Natural Science Foundation of China [41671206] ; Youth Innovation Promotion Association CAS, China [2018406, 2017424]
作者邮箱changruiying@imde.ac.cn ; wanggx@imde.ac.cn
引用统计
被引频次:25[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/26644
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolvement & Regulat, Chengdu 610041, Peoples R China
2.Cent South Univ Forestry & Technol, Natl Engn Lab Appl Technol Forestry & Ecol Southe, Changsha 410004, Peoples R China
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
4.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Peoples R China
5.Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu 610041, Peoples R China
6.Shanxi Agr Univ, Coll Anim Sci & Vet Technol, Taigu 030801, Peoples R China
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GB/T 7714
Chang, Ruiying,Liu, Shuguang,Chen, Leiyi,et al. Soil organic carbon becomes newer under warming at a permafrost site on the Tibetan Plateau[J]. SOIL BIOLOGY & BIOCHEMISTRY,2021,152.
APA Chang, Ruiying.,Liu, Shuguang.,Chen, Leiyi.,Li, Na.,Bing, Haijian.,...&Wang, Genxu.(2021).Soil organic carbon becomes newer under warming at a permafrost site on the Tibetan Plateau.SOIL BIOLOGY & BIOCHEMISTRY,152.
MLA Chang, Ruiying,et al."Soil organic carbon becomes newer under warming at a permafrost site on the Tibetan Plateau".SOIL BIOLOGY & BIOCHEMISTRY 152(2021).
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