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

doi:10.1111/1365-2435.13256

	Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms
	Zhao, Xuechao 1,2; Chen, Longchi 2,3; Wang, Qingkui 2,3; Yang, Qingpeng 2,3; Chen, Shi 1,2; Zhang, Weidong 2,3
刊名	FUNCTIONAL ECOLOGY
	2019-03-01
卷号	33 期号:3 页码:514-523
关键词	carbon quality-temperature hypothesis global warming labile soil organic carbon recalcitrant soil organic carbon soil organic carbon decomposition temperature sensitivity
ISSN号	0269-8463
DOI	10.1111/1365-2435.13256
英文摘要	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.
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
语种	英语
出版者	WILEY
WOS记录号	WOS:000460189400013
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123955]
专题	中国科学院沈阳应用生态研究所
通讯作者	Wang, Qingkui; Zhang, Weidong
作者单位	1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang, Liaoning, Peoples R China 3.Chinese Acad Sci, Huitong Expt Stn Forest Ecol, Huitong, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xuechao,Chen, Longchi,Wang, Qingkui,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	Zhao, Xuechao,Chen, Longchi,Wang, Qingkui,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	Zhao, Xuechao,et al."Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms".FUNCTIONAL ECOLOGY 33.3(2019):514-523.