Water-use efficiency of forest ecosystems in eastern China and its relations to climatic variables

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	Water-use efficiency of forest ecosystems in eastern China and its relations to climatic variables
	Yu, GR ; Song, X ; Wang, QF ; Liu, YF ; Guan, DX ; Yan, JH ; Sun, XM ; Zhang, LM ; Wen, XF
刊名	NEW PHYTOLOGIST
	2008
卷号	177 期号:4 页码:927-937
关键词	ChinaFLUX evapotranspiration (ET) forest ecosystem gross primary productivity (GPP) North-South transect of Eastern China (NSTEC) water-use efficiency (WUE)
ISSN号	0028-646X
通讯作者	Yu, GR, Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Synthesis Res Ctr,Chinese Ecosyst Res Network, Beijing 100101, Peoples R China
中文摘要	Carbon (C) and water cycles of terrestrial ecosystems are two coupled ecological processes controlled partly by stomatal behavior. Water-use efficiency (WUE) reflects the coupling relationship to some extent. At stand and ecosystem levels, the variability of WUE results from the trade-off between water loss and C gain in the process of plant photosynthetic C assimilation. Continuous observations of C, water, and energy fluxes were made at three selected forest sites of ChinaFLUX with eddy covariance systems from 2003 to 2005. WUE at different temporal scales were defined and calculated with different C and water flux components. Variations in WUE were found among three sites. Average annual WUE was 9.43 mg CO2 g(-1) H2O at Changbaishan temperate broad-leaved Korean pine mixed forest, 9.27 mg CO2 g(-1) H2O at Qianyanzhou subtropical coniferous plantation, and 6.90 mg CO2 g(-1) H2O at Dinghushan subtropical evergreen broad-leaved forest. It was also found that temperate and subtropical forest ecosystems had different relationships between gross primary productivity (GPP) and evapotranspiration (ET). Variations in WUE indicated the difference in the coupling between C and water cycles. The asynchronous response of GPP and ET to climatic variables determined the coupling and decoupling between C and water cycles for the two regional forest ecosystems.
学科主题	Plant Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000252986400011
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54533]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Yu, GR,Song, X,Wang, QF,et al. Water-use efficiency of forest ecosystems in eastern China and its relations to climatic variables[J]. NEW PHYTOLOGIST,2008,177(4):927-937.
APA	Yu, GR.,Song, X.,Wang, QF.,Liu, YF.,Guan, DX.,...&Wen, XF.(2008).Water-use efficiency of forest ecosystems in eastern China and its relations to climatic variables.NEW PHYTOLOGIST,177(4),927-937.
MLA	Yu, GR,et al."Water-use efficiency of forest ecosystems in eastern China and its relations to climatic variables".NEW PHYTOLOGIST 177.4(2008):927-937.