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Contrasting diel hysteresis between soil autotrophic and heterotrophic respiration in a desert ecosystem under different rainfall scenarios

文献类型：期刊论文

作者Song, Weimin1; Chen, Shiping1; Zhou, Yadan1; Wu, Bo2; Zhu, Yajuan2; Lu, Qi2; Lin, Guanghui
刊名SCIENTIFIC REPORTS
出版日期2015
卷号5
ISSN号2045-2322
DOI10.1038/srep16779
文献子类Article
英文摘要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.
学科主题Multidisciplinary Sciences
出版地BERLIN
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)
语种英语
WOS记录号WOS:000365422000001
出版者NATURE PORTFOLIO
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
源URL[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).

入库方式： OAI收割

来源：植物研究所

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