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Linking temperature sensitivity of soil CO2 release to substrate, environmental, and microbial properties across alpine ecosystems
Ding, Jinzhi1; Chen, Leiyi; Zhang, Beibei2; Liu, Li1; Yang, Guibiao1; Fang, Kai1; Chen, Yongliang; Li, Fei1; Kou, Dan1; Ji, Chengjun3,4; Luo, Yiqi5; Yang, Yuanhe
2016
发表期刊GLOBAL BIOGEOCHEMICAL CYCLES
ISSN0886-6236
卷号30期号:9页码:1310-1323
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.
学科领域Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
DOI10.1002/2015GB005333
收录类别SCI
语种英语
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)
WOS记录号WOS:000388457700006
出版者AMER GEOPHYSICAL UNION
文献子类Article
出版地WASHINGTON
EISSN1944-9224
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
作者邮箱yhyang@ibcas.ac.cn
引用统计
被引频次:99[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/2S10CLM1/25151
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, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Inner Mongolia Univ Technol, Coll Energy & Power Engn, Hohhot, Peoples R China
4.Peking Univ, Dept Ecol, Minist Educ, Beijing, Peoples R China
5.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing, Peoples R China
6.Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA
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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.
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