Soil organic carbon becomes newer under warming at a permafrost site on the Tibetan Plateau

doi:10.1016/j.soilbio.2020.108074

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Soil organic carbon becomes newer under warming at a permafrost site on the Tibetan Plateau
	Chang Ruiying 3; Liu Shuguang 2; Chen Leiyi 1; Li Na 5; Bing Haijian 3; Wang Tao 3; Chen Xiaopeng 4; Li Yang 3; Wang Genxu 3
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2021
卷号	152 页码:108074
关键词	Amino sugars Delta C-14 Warming duration Permafrost Plant-derived carbon
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2020.108074
产权排序	1
文献子类	Article
英文摘要	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.
语种	英语
WOS记录号	WOS:000595644500013
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55045]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室成都山地灾害与环境研究所_数字山地与遥感应用中心
通讯作者	Chang Ruiying; Wang Genxu
作者单位	1.State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; 2.National Engineering Laboratory for Applied Technology of Forestry & Ecology in Southern China, Central South University of Forestry and Technology, Changsha, 410004, China; 3.Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China; 4.College of Animal Science and Veterinary Technology, Shanxi Agricultural University, Taigu, 030801, China 5.CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China;
推荐引用方式 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,2021,152:108074.
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,152,108074.
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):108074.