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Contrasting diel hysteresis between soil autotrophic and heterotrophic respiration in a desert ecosystem under different rainfall scenarios | |
Song, Weimin1; Chen, Shiping1; Zhou, Yadan1; Wu, Bo2; Zhu, Yajuan2; Lu, Qi2; Lin, Guanghui | |
2015 | |
发表期刊 | SCIENTIFIC REPORTS |
ISSN | 2045-2322 |
卷号 | 5 |
摘要 | Diel hysteresis occurs often between soil CO2 efflux (R-S) and temperature, yet, little is known if diel hysteresis occurs in the two components of R-S, i.e., autotrophic respiration (R-A) and heterotrophic respiration (R-H), and how diel hysteresis will respond to future rainfall change. We conducted a field experiment in a desert ecosystem in northern China simulating five different scenarios of future rain regimes. Diel variations of soil CO2 efflux and soil temperature were measured on Day 6 and Day 16 following the rain addition treatments each month during the growing season. We found contrasting responses in the diel hysteresis of R-A and R-H to soil temperature, with a clockwise hysteresis loop for R-H but a counter-clockwise hysteresis loop for R-A. Rain addition significantly increased the magnitude of diel hysteresis for both R-H and R-A on Day 6, but had no influence on either on Day 16 when soil moisture was much lower. These findings underline the different roles of biological (i.e. plant and microbial activities) and physical-chemical (e.g. heat transport and inorganic CO2 exchange) processes in regulating the diel hysteresis of R-A and R-H, which should be considered when estimating soil CO2 efflux in desert regions under future rainfall regime. |
学科领域 | Multidisciplinary Sciences |
DOI | 10.1038/srep16779 |
收录类别 | SCI |
语种 | 英语 |
WOS关键词 | VERTICAL-DISTRIBUTION ; CARBON FLUXES ; MICROBIAL RESPIRATION ; PRECIPITATION PULSES ; ROOT RESPIRATION ; CLIMATE-CHANGE ; WATER-CONTENT ; CO2 FLUX ; TEMPERATURE ; PHOTOSYNTHESIS |
WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
WOS记录号 | WOS:000365422000001 |
出版者 | NATURE PORTFOLIO |
文献子类 | Article |
出版地 | BERLIN |
资助机构 | Science and Technologies Foundation of the Chinese Academy of Forestry [CAFYBB2007008] ; Ministry of Science and Technology, China [2013CB956601] ; Chinese Academy of Sciences [XDA05050402] ; National Natural Science Foundation of China [31170453] ; State Key Laboratory of Vegetation and Environment Change |
作者邮箱 | lingh@tsinghua.edu.cn |
作品OA属性 | Green Published, gold |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/25958 |
专题 | 植被与环境变化国家重点实验室 |
作者单位 | 1.Tsinghua Univ, Minist Educ, Key Lab Earth Syst Modeling, Ctr Earth Syst Sci, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China |
推荐引用方式 GB/T 7714 | Song, Weimin,Chen, Shiping,Zhou, Yadan,et al. Contrasting diel hysteresis between soil autotrophic and heterotrophic respiration in a desert ecosystem under different rainfall scenarios[J]. SCIENTIFIC REPORTS,2015,5. |
APA | Song, Weimin.,Chen, Shiping.,Zhou, Yadan.,Wu, Bo.,Zhu, Yajuan.,...&Lin, Guanghui.(2015).Contrasting diel hysteresis between soil autotrophic and heterotrophic respiration in a desert ecosystem under different rainfall scenarios.SCIENTIFIC REPORTS,5. |
MLA | Song, Weimin,et al."Contrasting diel hysteresis between soil autotrophic and heterotrophic respiration in a desert ecosystem under different rainfall scenarios".SCIENTIFIC REPORTS 5(2015). |
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