Knowledge Management System Of Institute Of Botany,CAS
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 |
ISSN | 0886-6236 |
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 |
DOI | 10.1002/2015GB005333 |
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 |
EISSN | 1944-9224 |
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 | |
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 |
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. |
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