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Asymmetric sensitivity of ecosystem carbon and water processes in response to precipitation change in a semi-arid steppe

文献类型：期刊论文

作者Zhang, Bingwei1; Tan, Xingru1; Wang, Shanshan1; Chen, Minling2; Chen, Shiping; Ren, Tingting; Xia, Jianyang3; Bai, Yongfei; Huang, Jianhui; Han, Xingguo
刊名FUNCTIONAL ECOLOGY
出版日期2017
卷号31期号:6页码:1301-1311
关键词altered precipitation carbon use efficiency ecosystem CO2 exchanges evapotranspiration nonlinear response water use efficiency
ISSN号0269-8463
DOI10.1007/s00128-017-2163-x
文献子类Article
英文摘要Semi-arid ecosystems play an important role in regulating the dynamics of the global terrestrial CO2 sink. These dynamics are mainly driven by increasing inter-annual precipitation variability. However, how ecosystem carbon processes respond to changes in precipitation is not well understood, due to a lack of substantial experimental evidence that combines increased and decreased precipitation treatments. This study, a 3-year field manipulation experiment with five precipitation levels conducted in a semi-arid steppe, examined the impacts of increased and decreased precipitation on ecosystem CO2 (GEP: gross ecosystem photosynthesis; ER: ecosystem respiration; NEE: net ecosystem CO2 exchange), water exchange (ET: evapotranspiration), and resource use efficiency (CUE: carbon use efficiency; WUE: water use efficiency). We found that decreased precipitation reduced ecosystem CO2, water exchange and resource use efficiency significantly, while increased precipitation did not cause significant influence on them. That is, they responded more sensitively to decreased precipitation. Soil water availability was the most important driver determining changes in GEP, ER and ET. Changes in NEE, CUE and WUE were predominately regulated by soil temperature. Photosynthesis at leaf and ecosystem levels showed significantly greater sensitivity to changed precipitation than respiration and ET, and therefore determined the trends of net carbon uptake and resource use efficiency. This study highlighted an asymmetric response of ecosystem carbon and water processes to altered precipitation. This is potentially important for improving our understanding of how possible future changes in precipitation will affect the carbon cycle. Taking this asymmetric response into consideration will inevitably reduce uncertainties in predicting the dynamics of the global carbon cycle. A is available for this article.
学科主题Environmental Sciences & Ecology ; Toxicology
出版地HOBOKEN
电子版国际标准刊号1365-2435
WOS关键词USE EFFICIENCY ; TEMPERATE STEPPE ; CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; GRASSLAND ECOSYSTEM ; NITROGEN ADDITION ; DIFFERENTIAL RESPONSES ; PLANT RESPIRATION ; SOIL RESPIRATION ; INNER-MONGOLIA
语种英语
WOS记录号WOS:000411900300005
出版者WILEY
资助机构National Program on Key Research Project of China [2016YFC0500703, 2016YFC0500103] ; 'Strategic Priority Research Program - Climate Change: Carbon Budget and Relevant Issues' of the Chinese Academy of Sciences [XDA05050402]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/22010]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Jinan Univ, Coll Chinese Language & Culture, Guangzhou 510610, Guangdong, Peoples R China
4.East China Normal Univ, Tiantong Natl Forest Ecosyst Observat & Res Stn, Sch Ecol & Environm Sci, Shanghai 200062, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Bingwei,Tan, Xingru,Wang, Shanshan,et al. Asymmetric sensitivity of ecosystem carbon and water processes in response to precipitation change in a semi-arid steppe[J]. FUNCTIONAL ECOLOGY,2017,31(6):1301-1311.
APA Zhang, Bingwei.,Tan, Xingru.,Wang, Shanshan.,Chen, Minling.,Chen, Shiping.,...&Han, Xingguo.(2017).Asymmetric sensitivity of ecosystem carbon and water processes in response to precipitation change in a semi-arid steppe.FUNCTIONAL ECOLOGY,31(6),1301-1311.
MLA Zhang, Bingwei,et al."Asymmetric sensitivity of ecosystem carbon and water processes in response to precipitation change in a semi-arid steppe".FUNCTIONAL ECOLOGY 31.6(2017):1301-1311.

入库方式： OAI收割

来源：植物研究所

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