Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China

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	Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China
	Zhu, Xianjin 1,2; Yu, Guirui 1; Wang, Qiufeng 1; Hu, Zhongmin 1; Han, Shijie 3; Yan, Junhua 4; Wang, Yanfen 2; Zhao, Liang 5
	2014-02-01
发表期刊	JOURNAL OF FOREST RESEARCH
ISSN	1341-6979
卷号	19 期号:1 页码:70-76
文章类型	Article
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.; 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.
关键词	Ecosystems In chIna Eddy Covariance Seasonal Dynamics Water Use Efficiency
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	CARBON ; EXCHANGE ; FLUXES ; CO2
收录类别	SCI
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:000329404600008
引用统计	被引频次：50[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/4260
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Synth Res Ctr,CERN, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China 5.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810001, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Xianjin,Yu, Guirui,Wang, Qiufeng,et al. Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China[J]. JOURNAL OF FOREST RESEARCH,2014,19(1):70-76.
APA	Zhu, Xianjin.,Yu, Guirui.,Wang, Qiufeng.,Hu, Zhongmin.,Han, Shijie.,...&Zhao, Liang.(2014).Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China.JOURNAL OF FOREST RESEARCH,19(1),70-76.
MLA	Zhu, Xianjin,et al."Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China".JOURNAL OF FOREST RESEARCH 19.1(2014):70-76.

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