干旱区生态环境知识资源中心(Arid): Seasonal variation in the groundwater dependency of two dominant woody species in a desert region of Central Asia

Arid

DOI	10.1007/s11104-019-04251-2
	Seasonal variation in the groundwater dependency of two dominant woody species in a desert region of Central Asia
	Wu, Xue 1,2,3; Zheng, Xin-Jun 1,2,3; Yin, Xin-Wei 1,2,3; Yue, Yue-Meng 1,2,3; Liu, Ran 1,2; Xu, Gui-Qing 1,2; Li, Yan1,2
通讯作者	Li, Yan
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2019
卷号	444 期号:1-2 页码:39-55
英文摘要	Aims Groundwater is an important water source for plants in desert regions and greatly affects the performance and survival of desert plants. Moreover, the effects of groundwater variations on desert plants are not completely understood. This study aims to investigate the groundwater dependency of two dominant woody species (Haloxylon ammodendron and H. persicum) in the Gurbantunggut Desert of Central Asia, and evaluate their water use and physiological responses under a decline in groundwater depth. Methods Oxygen stable isotopes of soil water, groundwater and xylem water as well as the IsoSource model were used to determine seasonal variations in the water sources of the two studied species along a groundwater depth gradient. In addition, the plant water potential and stomatal conductance were measured to determine the physiological performance. Results (1) Although both species extracted groundwater, H. ammodendron was much more groundwater dependent; (2) the two species exhibited significant seasonal variations in their degree of groundwater dependency, which was relatively lower in the wet season, and higher during the dry period; and (3) when the groundwater availability declined, both species reduced their groundwater use, although only H. ammodendron exhibited a significantly negative physiological response. Conclusions This study demonstrated that plants with different water sources respond differently to the decline of groundwater depth and the effects of groundwater drawdowns are determined by the groundwater dependency of desert plants. A better understanding of desert plant responses to water availability variations is crucial for modeling, predicting and managing desert ecosystems in the context of global change.
英文关键词	Stable isotope Water uptake Groundwater depth Physiological response
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000498997900003
WOS关键词	WATER-USE STRATEGIES ; ISOTOPIC COMPOSITIONS ; STABLE-ISOTOPES ; DROUGHT STRESS ; SOIL-WATER ; PLANT ; PRECIPITATION ; DEPTH ; RESPONSES ; PATTERNS
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
EI主题词	2019-11-01
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310591
作者单位	1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; 2.Chinese Acad Sci, Fukang Stn Desert Ecol, Fukang 831505, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu, Xue,Zheng, Xin-Jun,Yin, Xin-Wei,et al. Seasonal variation in the groundwater dependency of two dominant woody species in a desert region of Central Asia[J]. 中国科学院新疆生态与地理研究所,2019,444(1-2):39-55.
APA	Wu, Xue.,Zheng, Xin-Jun.,Yin, Xin-Wei.,Yue, Yue-Meng.,Liu, Ran.,...&Li, Yan.(2019).Seasonal variation in the groundwater dependency of two dominant woody species in a desert region of Central Asia.PLANT AND SOIL,444(1-2),39-55.
MLA	Wu, Xue,et al."Seasonal variation in the groundwater dependency of two dominant woody species in a desert region of Central Asia".PLANT AND SOIL 444.1-2(2019):39-55.