干旱区生态环境知识资源中心(Arid): Spatiotemporal variability of ecosystem water use efficiency in northern Ethiopia during 1982-2014

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DOI	10.1016/j.jhydrol.2021.126863
	Spatiotemporal variability of ecosystem water use efficiency in northern Ethiopia during 1982-2014
	Tesfaye, Samuale; Taye, Gebeyehu; Birhane, Emiru; van der Zee, Sjoerd E. A. T. M.
通讯作者	Tesfaye, S (corresponding author), Wageningen Univ, Soil Phys & Land Management Grp, POB 47, NL-6700 AA Wageningen, Netherlands.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	603
英文摘要	Water use efficiency (WUE) measures the trade-off between carbon gain and water loss and is an important link between the carbon and water cycles. A better understanding of spatiotemporal variation in WUE and its controlling factors will help to improve ecosystem management for adapting to and mitigating the impacts of climatic change. We examined the spatiotemporal variations of WUE and its controlling factors for five bioclimatic zones and four land covers for 1982-2014 in the Tekeze River basin in northern Ethiopia. We quantified mean annual and seasonal net primary productivity (NPP), actual evapotranspiration (ETa), and WUE (NPP/ETa) during this period and found that each increased significantly. NPP, ETa, and therefore WUE varied spatially amongst the bioclimatic zones and land covers, but with different patterns. WUE was higher in semi-arid than humid zones. Spatiotemporal changes in temperature and precipitation could be important controls on NPP and ETa variations and therefore WUE. Mild and severe droughts in the southern regions of the basin decreased annual WUE, and moderate and extreme droughts slightly increased it, indicating that the measure of environmental rehabilitation implemented since the 1980s have increased NPP in these regions, despite the water stress caused by frequent droughts. The variability of WUE was primarily controlled by climatic change and human activity, the latter dominant since the 2000s. Ecological restoration and measures for conserving soil and water could substantially increase the vegetation productivity of this region, and be a viable management strategy to both adapt to and mitigate the impacts of climate change.
英文关键词	Water use efficiency Primary productivity Ecosystem model Climatic factor Drought Ethiopia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000706313000048
WOS关键词	NET PRIMARY PRODUCTION ; BLUE NILE BASIN ; TERRESTRIAL CARBON SINKS ; CHINA LOESS PLATEAU ; LAND-COVER DYNAMICS ; AWASH RIVER-BASIN ; PRIMARY PRODUCTIVITY ; CLIMATE-CHANGE ; INTERANNUAL VARIABILITY ; SPATIAL INTERPOLATION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368144
作者单位	[Tesfaye, Samuale; van der Zee, Sjoerd E. A. T. M.] Wageningen Univ, Soil Phys & Land Management Grp, POB 47, NL-6700 AA Wageningen, Netherlands; [Tesfaye, Samuale; Taye, Gebeyehu; Birhane, Emiru] Mekelle Univ, Dept Land Resources Management & Environm Protect, POB 231, Mekelle, Ethiopia; [Birhane, Emiru] Norwegian Univ Life Sci, Dept Ecol & Nat Resource Management, POB 5003, NO-1432 As, Norway; [van der Zee, Sjoerd E. A. T. M.] Monash Univ, Sch Chem, Melbourne, Vic 3800, Australia
推荐引用方式 GB/T 7714	Tesfaye, Samuale,Taye, Gebeyehu,Birhane, Emiru,et al. Spatiotemporal variability of ecosystem water use efficiency in northern Ethiopia during 1982-2014[J],2021,603.
APA	Tesfaye, Samuale,Taye, Gebeyehu,Birhane, Emiru,&van der Zee, Sjoerd E. A. T. M..(2021).Spatiotemporal variability of ecosystem water use efficiency in northern Ethiopia during 1982-2014.JOURNAL OF HYDROLOGY,603.
MLA	Tesfaye, Samuale,et al."Spatiotemporal variability of ecosystem water use efficiency in northern Ethiopia during 1982-2014".JOURNAL OF HYDROLOGY 603(2021).