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	Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China
	Zhu X. J. ; Yu G. R. ; Wang Q. F. ; Hu Z. M. ; Han S. J. ; Yan J. H. ; Wang Y. F. ; Zhao L.
	2014
关键词	Ecosystems in China Eddy covariance Seasonal dynamics Water use efficiency carbon exchange fluxes co2
英文摘要	We selected four sites of ChinaFLUX representing four major ecosystem types in China-Changbaishan temperate broad-leaved Korean pine mixed forest (CBS), Dinghushan subtropical evergreen broadleaved forest (DHS), Inner Mongolia temperate steppe (NM), and Haibei alpine shrub-meadow (HBGC)-to study the seasonal dynamics of ecosystem water use efficiency (WUE = GPP/ET, where GPP is gross primary productivity and ET is evapotranspiration) and factors affecting it. Our seasonal dynamics results indicated single-peak variation of WUE in CBS, NM, and HBGC, which were affected by air temperature (Ta) and leaf area index (LAI), through their effects on the partitioning of evapotranspiration (ET) into transpiration (T) (i.e., T/ET). In DHS, WUE was higher at the beginning and the end of the year, and minimum in summer. Ta and soil water content affected the seasonal dynamics of WUE through their effects on GPP/T. Our results indicate that seasonal dynamics of WUE were different because factors affecting the seasonal dynamics and their mechanism were different among the key ecosystems.
出处	Journal of Forest Research
卷	19
期	1
页	70-76
收录类别	SCI
语种	英语
ISSN号	1341-6979
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29340]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhu X. J.,Yu G. R.,Wang Q. F.,et al. Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China. 2014.

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