Linking temperature sensitivity of soil CO2 release to substrate, environmental, and microbial properties across alpine ecosystems

doi:10.1002/2015GB005333

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Linking temperature sensitivity of soil CO2 release to substrate, environmental, and microbial properties across alpine ecosystems
	Ding, Jinzhi 6; Chen, Leiyi ; Zhang, Beibei 5; Liu, Li 6; Yang, Guibiao 6; Fang, Kai 6; Chen, Yongliang ; Li, Fei 6; Kou, Dan 6; Ji, Chengjun 1,4
刊名	GLOBAL BIOGEOCHEMICAL CYCLES
	2016
卷号	30 期号:9 页码:1310-1323
ISSN号	0886-6236
DOI	10.1002/2015GB005333
文献子类	Article
英文摘要	Our knowledge of fundamental drivers of the temperature sensitivity (Q(10)) of soil carbon dioxide (CO2) release is crucial for improving the predictability of soil carbon dynamics in Earth System Models. However, patterns and determinants of Q(10) over a broad geographic scale are not fully understood, especially in alpine ecosystems. Here we addressed this issue by incubating surface soils (0-10 cm) obtained from 156 sites across Tibetan alpine grasslands. Q(10) was estimated from the dynamics of the soil CO2 release rate under varying temperatures of 5-25 degrees C. Structure equation modeling was performed to evaluate the relative importance of substrate, environmental, and microbial properties in regulating the soil CO2 release rate and Q(10). Our results indicated that steppe soils had significantly lower CO2 release rates but higher Q(10) than meadow soils. The combination of substrate properties and environmental variables could predict 52% of the variation in soil CO2 release rate across all grassland sites and explained 37% and 58% of the variation in Q(10) across the steppe and meadow sites, respectively. Of these, precipitation was the best predictor of soil CO2 release rate. Basal microbial respiration rate (B) was the most important predictor of Q(10) in steppe soils, whereas soil pH outweighed B as the major regulator in meadow soils. These results demonstrate that carbon quality and environmental variables coregulate Q(10) across alpine ecosystems, implying that modelers can rely on the carbon-quality temperature hypothesis for estimating apparent temperature sensitivities, but relevant environmental factors, especially soil pH, should be considered in higher-productivity alpine regions.
学科主题	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
电子版国际标准刊号	1944-9224
出版地	WASHINGTON
WOS关键词	ORGANIC-MATTER QUALITY ; CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; CARBON DECOMPOSITION ; TIBETAN GRASSLANDS ; LABILE CARBON ; RESPIRATION ; MINERALIZATION ; BIOMASS ; CHINA
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000388457700006
资助机构	National Basic Research Program of China on Global ChangeNational Basic Research Program of China [2014CB954001, 2015CB954201] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31322011, 41371213] ; Chinese Academy of Sciences-Peking University Pioneer Collaboration Team ; Thousand Young Talents ProgramChinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/25151]
专题	植被与环境变化国家重点实验室
作者单位	1.Peking Univ, Dept Ecol, Minist Educ, Beijing, Peoples R China 2.Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA 3.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing, Peoples R China 4.Inner Mongolia Univ Technol, Coll Energy & Power Engn, Hohhot, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China 6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Ding, Jinzhi,Chen, Leiyi,Zhang, Beibei,et al. Linking temperature sensitivity of soil CO2 release to substrate, environmental, and microbial properties across alpine ecosystems[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2016,30(9):1310-1323.
APA	Ding, Jinzhi.,Chen, Leiyi.,Zhang, Beibei.,Liu, Li.,Yang, Guibiao.,...&Yang, Yuanhe.(2016).Linking temperature sensitivity of soil CO2 release to substrate, environmental, and microbial properties across alpine ecosystems.GLOBAL BIOGEOCHEMICAL CYCLES,30(9),1310-1323.
MLA	Ding, Jinzhi,et al."Linking temperature sensitivity of soil CO2 release to substrate, environmental, and microbial properties across alpine ecosystems".GLOBAL BIOGEOCHEMICAL CYCLES 30.9(2016):1310-1323.