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Water and nitrogen availability co-control ecosystem CO2 exchange in a semiarid temperate steppe

文献类型：期刊论文

作者Zhang, Xiaolin2; Tan, Yulian; Li, Ang; Ren, Tingting; Chen, Shiping; Wang, Lixin1; Huang, Jianhui
刊名SCIENTIFIC REPORTS
出版日期2015
卷号5
ISSN号2045-2322
DOI10.1038/srep15549
文献子类Article
英文摘要Both water and nitrogen (N) availability have significant effects on ecosystem CO2 exchange (ECE), which includes net ecosystem productivity (NEP), ecosystem respiration (ER) and gross ecosystem photosynthesis (GEP). How water and N availability influence ECE in arid and semiarid grasslands is still uncertain. A manipulative experiment with additions of rainfall, snow and N was conducted to test their effects on ECE in a semiarid temperate steppe of northern China for three consecutive years with contrasting natural precipitation. ECE increased with annual precipitation but approached peak values at different precipitation amount. Water addition, especially summer water addition, had significantly positive effects on ECE in years when the natural precipitation was normal or below normal, but showed trivial effect on GEP when the natural precipitation was above normal as effects on ER and NEP offset one another. Nitrogen addition exerted non-significant or negative effects on ECE when precipitation was low but switched to a positive effect when precipitation was high, indicating N effect triggered by water availability. Our results indicate that both water and N availability control ECE and the effects of future precipitation changes and increasing N deposition will depend on how they can change collaboratively in this semiarid steppe ecosystem.
学科主题Multidisciplinary Sciences
出版地BERLIN
WOS关键词CARBON-DIOXIDE EXCHANGE ; SOIL RESPIRATION ; DIFFERENTIAL RESPONSES ; TEMPORAL VARIATION ; CLIMATE ; GRASSLAND ; PRECIPITATION ; DEPOSITION ; PULSES ; SNOW
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000363315100001
出版者NATURE PORTFOLIO
资助机构National Natural Science Foundation of China [31430016] ; Strategic Priority Research Program on Soil and Microbes of the Chinese Academy of Sciences [XDB15010401]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/25964]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
3.IUPUI, Dept Earth Sci, Indianapolis, IN 46202 USA
推荐引用方式
GB/T 7714		 Zhang, Xiaolin,Tan, Yulian,Li, Ang,et al. Water and nitrogen availability co-control ecosystem CO2 exchange in a semiarid temperate steppe[J]. SCIENTIFIC REPORTS,2015,5.
APA Zhang, Xiaolin.,Tan, Yulian.,Li, Ang.,Ren, Tingting.,Chen, Shiping.,...&Huang, Jianhui.(2015).Water and nitrogen availability co-control ecosystem CO2 exchange in a semiarid temperate steppe.SCIENTIFIC REPORTS,5.
MLA Zhang, Xiaolin,et al."Water and nitrogen availability co-control ecosystem CO2 exchange in a semiarid temperate steppe".SCIENTIFIC REPORTS 5(2015).

入库方式： OAI收割

来源：植物研究所

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