气候变化领域集成服务门户(CCPortal): Characteristics of ecosystem water use efficiency in a desert riparian forest

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DOI	10.1007/s12665-018-7518-z
	Characteristics of ecosystem water use efficiency in a desert riparian forest
	Ma, Xiaohong; Feng, Qi; Su, Yonghong; Yu, Tengfei; Deo, Ravinesh C.
发表日期	2018
ISSN	1866-6280
EISSN	1866-6299
卷号	77 期号:10
英文摘要	The Ejin oasis, located on the river sides of a hyper-arid region, represents some of the richest desert ecosystems, populated with riparian forest. Water availability is the main limited factors for the distribution and growth of the forest. Currently, the water-carbon process and mechanisms in the desert riparian forest remain uncertain. The study investigated the seasonal and inter-annual variations in the gross primary productivity (GPP), evapotranspiration (ET) and ecosystem water use efficiency (WUE), and their relationships with the event (e.g., irrigation) and climatic factors. The results showed that the desert riparian forest produced new plant biomass with 0.79 g C kg(-1) of water loss during the growing season. In the study period, monthly GPP and ET was tightly coupled, and the mean cumulative GPP and ET from May-October were 676 g C m(-2) and 864 mm, respectively. Daily GPP and ET had similar relationships with global radiation (R-g), air temperature (T-a) and vapor pressure deficit at monthly scale. Consequently, the seasonal variations in WUE were not obvious in the growing season, except in September. In September, the value of WUE decreased significantly with an increase in T-a (for T-a > 15 A degrees C) after irrigation, which was attributable to the increased ET and a relatively steady GPP. It is possible that the time of irrigation is able to affect the seasonal course of WUE. The study has implications that enable more rational water management to maintain the the health and activities of the riparian forest in such a hyper-arid region.
关键词	Ecosystem water use efficiency The desert riparian forest Irrigation effects
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111999
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Ma, Xiaohong,Feng, Qi,Su, Yonghong,et al. Characteristics of ecosystem water use efficiency in a desert riparian forest[J]. 中国科学院西北生态环境资源研究院,2018,77(10).
APA	Ma, Xiaohong,Feng, Qi,Su, Yonghong,Yu, Tengfei,&Deo, Ravinesh C..(2018).Characteristics of ecosystem water use efficiency in a desert riparian forest.ENVIRONMENTAL EARTH SCIENCES,77(10).
MLA	Ma, Xiaohong,et al."Characteristics of ecosystem water use efficiency in a desert riparian forest".ENVIRONMENTAL EARTH SCIENCES 77.10(2018).