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	Comparison of evapotranspiration components and water-use efficiency among different land use patterns of temperate steppe in the northern china pastoral-farming ecotone
	Li, Yuzhe1,2; Fan, Jiangwen1; Hu, Zhongmin3; Shao, Quanqin1; Harris, Warwick4
刊名	International journal of biometeorology
	2016-06-01
卷号	60期号:6页码:827-841
关键词	Temperate steppe Evapotranspiration composition Water-use efficiency Pastoral-farming ecotone Grassland use change Grassland cultivation Grazing exclusion
ISSN号	0020-7128
DOI	10.1007/s00484-015-1076-9
通讯作者	Li, yuzhe(liyz.12b@igsnrr.ac.cn) ; Fan, jiangwen(fanjw@igsnrr.ac.cn)
英文摘要	Water-use efficiency (wue), which links carbon and water cycles, is an important indicator of assessing the interactions between ecosystems and regional climate. using chamber methods with and without plant removal treatments, we investigated wue and evapotranspiration (et) components in three ecosystems with different land-use types in northern china pastoral-farming ecotone. in comparison, et of the ecosystems with grazing exclusion and cultivating was 6.7 and 13.4 % higher than that of the ecosystem with free grazing. the difference in et was primarily due to the different magnitudes of soil water evaporation (e) rather than canopy transpiration (t). canopy wue (wuec, i.e., the ratio of gross primary productivity to t) at the grazing excluded and cultivated sites was 17 and 36% higher than that at the grazing site. ecosystem wue (wuenep, i.e., the ratio of net ecosystem productivity to et) at the cultivated site was 34 and 28% lower in comparison with grazed and grazing excluded stepped, respectively. the varied leaf area index (lai) of different land uses was correlated with microclimate and ecosystem vapor/carbon exchange. the lai changing with land uses should be the primary regulation of grassland wue. these findings facilitate the mechanistic understanding of carbon-water relationships at canopy and ecosystem levels and projection of the effects of land-use change on regional climate and productivity.
WOS关键词	RAIN-USE EFFICIENCY ; PRECIPITATION-USE EFFICIENCY ; GROSS PRIMARY PRODUCTION ; INNER-MONGOLIA ; GRASSLAND ECOSYSTEMS ; SEMIARID STEPPE ; CARBON STORAGE ; CLIMATE-CHANGE ; DYNAMICS ; FOREST
WOS研究方向	Biophysics ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Physiology
WOS类目	Biophysics ; Environmental Sciences ; Meteorology & Atmospheric Sciences ; Physiology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000379262000004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2374683
专题	中国科学院大学
通讯作者	Li, Yuzhe; Fan, Jiangwen
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 4.Landcare Res, POB 69040, Lincoln 7640, New Zealand
推荐引用方式 GB/T 7714	Li, Yuzhe,Fan, Jiangwen,Hu, Zhongmin,et al. Comparison of evapotranspiration components and water-use efficiency among different land use patterns of temperate steppe in the northern china pastoral-farming ecotone[J]. International journal of biometeorology,2016,60(6):827-841.
APA	Li, Yuzhe,Fan, Jiangwen,Hu, Zhongmin,Shao, Quanqin,&Harris, Warwick.(2016).Comparison of evapotranspiration components and water-use efficiency among different land use patterns of temperate steppe in the northern china pastoral-farming ecotone.International journal of biometeorology,60(6),827-841.
MLA	Li, Yuzhe,et al."Comparison of evapotranspiration components and water-use efficiency among different land use patterns of temperate steppe in the northern china pastoral-farming ecotone".International journal of biometeorology 60.6(2016):827-841.

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