Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms

doi:10.1111/1365-2435.13256

IMR OpenIR

	Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms
	Wang, Qingkui 1,2; Zhao, Xuechao 1,3; Chen, Longchi 1,2; Yang, Qingpeng 1,2; Chen, Shi 1,3; Zhang, Weidong 1,2
通讯作者	Wang, Qingkui(qwang@iae.ac.cn) ; Zhang, Weidong(wdzhang@iae.ac.cn)
	2019-03-01
发表期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
卷号	33 期号:3 页码:514-523
摘要	The response of soil organic carbon (SOC) decomposition to global warming is a potentially major source of uncertainty in climate prediction. However, the magnitude and direction of SOC cycle feedbacks under climate warming remain uncertain because of the knowledge gap about the global-scale spatial pattern and temperature sensitivity (Q(10)) mechanism of SOC decomposition. Here, we collected data of Q(10) and corresponding soil variables from 81 peer-reviewed papers using laboratory incubation to explore how Q(10) varied among different ecosystems at the global scale and whether labile and recalcitrant SOC pools had equal Q(10) values. Q(10) with a global average of 2.41 substantially varied among different ecosystems, ranging from the highest in cropland soils (2.76) and the lowest in wetland soils (1.84). Hump-shaped correlations of Q(10) values with the maximum at SOC = 190 g/kg and the minimum at clay = 37% were observed. However, the main influencing factors of Q(10) differed among various ecosystems. Q(10) values showed a clear decrease with increasing incubation temperature but no significant decrease above 25 degrees C. In general, labile SOC was less sensitive than recalcitrant SOC to warming. Structural equation model analyses showed that total N and SOC accounted for 53% and 46%, respectively, of the variation in Q(10) of labile SOC and recalcitrant SOC. This finding suggested that Q(10) values of labile and recalcitrant SOC pools had different controlling factors. Our findings highlighted the importance of Q(10)'s variations in ecosystem types and the response of recalcitrant SOC to warming in predicting the soil C cycling and its feedback to climate change. Therefore, ecosystem type and difference in Q(10) of labile and recalcitrant SOC should be considered to precisely predict the soil C dynamics under global warming. A is available for this article.
关键词	carbon quality-temperature hypothesis global warming labile soil organic carbon recalcitrant soil organic carbon soil organic carbon decomposition temperature sensitivity
资助者	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences
DOI	10.1111/1365-2435.13256
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[31830015] ; National Natural Science Foundation of China[31570466] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB15010301] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDB-SSW-DQC002]
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000460189400013
出版者	WILEY
引用统计	被引频次：52[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/132186
专题	中国科学院金属研究所
通讯作者	Wang, Qingkui; Zhang, Weidong
作者单位	1.Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang, Liaoning, Peoples R China 2.Chinese Acad Sci, Huitong Expt Stn Forest Ecol, Huitong, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qingkui,Zhao, Xuechao,Chen, Longchi,et al. Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms[J]. FUNCTIONAL ECOLOGY,2019,33(3):514-523.
APA	Wang, Qingkui,Zhao, Xuechao,Chen, Longchi,Yang, Qingpeng,Chen, Shi,&Zhang, Weidong.(2019).Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms.FUNCTIONAL ECOLOGY,33(3),514-523.
MLA	Wang, Qingkui,et al."Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms".FUNCTIONAL ECOLOGY 33.3(2019):514-523.