Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China

doi:10.1007/s10584-019-02650-z

	Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China
	Sun, Hongru 1; Zhou, Guangsheng 2; Xu, Zhenzhu; Wang, Yuhui ; Liu, Xiaodi 1; Yu, Hongying 1; Ma, Quanhui 1; Jia, Bingrui
	2020
发表期刊	CLIMATIC CHANGE
ISSN	0165-0009
卷号	160 期号:3 页码:373-384
摘要	Soil respiration universally exhibits exponential temperature dependence (Respiration = R-0 e(beta T) & Q(10) = e(10 beta)), and temperature sensitivity (Q(10)) and soil organic carbon quality (as expressed by basal respiration rate at 0 degrees C, R-0) are the key parameters. Despite their importance for predicting the responses of forest ecosystems to climate change and quantifying the magnitude of soil CO2 efflux, the controlling factors of temperature sensitivity and soil carbon quality and their relationships among various forest types at a regional scale are as yet unknown. Here, we present a comprehensive analysis of Q(10), R-0, and their related variables by assembling 154 independent temperature-respiration functions under a common standard in forest ecosystems across northeast China (41 degrees 51 '-51 degrees 24 ' N, 118 degrees 37 '-129 degrees 48 ' E). The R-0 values ranged from 0.1700 to 2.1194 mu mol m(-2) s(-1) (mean = 0.8357 mu mol m(-2) s(-1)), and the Q(10) values from 1.29 to 5.42 (mean = 2.72). The relationships between Q(10) and R-0 could be best expressed with exponential decay equations (R-2 = 0.460-0.611, P < 0.01). They indicated that the temperature sensitivity decreased with increasing the soil carbon quality, and then tended to level off when the R-0 values were larger than ~1 mu mol m(-2) s(-1). Soil carbon quality (R-0) was closely related with the minimum soil temperature and its corresponding soil respiration rate during the growing season (R-2 = 0.696-0.857, P < 0.01). Such a synthesis is necessary to fully understand the spatial heterogeneity in the temperature sensitivity of soil respiration and to increase our ability to make robust predictions about the future carbon budget.
关键词	Soil respiration Q(10) Basal respiration Carbon quality-temperature hypothesis Forest ecosystem China
学科领域	Environmental Sciences ; Meteorology & Atmospheric Sciences
DOI	10.1007/s10584-019-02650-z
收录类别	SCI
语种	英语
WOS关键词	ORGANIC-MATTER DECOMPOSITION ; CYCLE FEEDBACKS ; CLIMATE-CHANGE ; RESPIRATION ; Q(10) ; VARIABILITY ; PATTERNS ; FRACTIONS ; LOSSES ; MODEL
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000538252000003
出版者	SPRINGER
文献子类	Article
出版地	DORDRECHT
EISSN	1573-1480
作者邮箱	jiabingrui@ibeas.ac.cn
作品OA属性	Green Submitted
引用统计	被引频次：6[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/2S10CLM1/21729
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 Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Sun, Hongru,Zhou, Guangsheng,Xu, Zhenzhu,et al. Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China[J]. CLIMATIC CHANGE,2020,160(3):373-384.
APA	Sun, Hongru.,Zhou, Guangsheng.,Xu, Zhenzhu.,Wang, Yuhui.,Liu, Xiaodi.,...&Jia, Bingrui.(2020).Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China.CLIMATIC CHANGE,160(3),373-384.
MLA	Sun, Hongru,et al."Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China".CLIMATIC CHANGE 160.3(2020):373-384.

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