干旱区生态环境知识资源中心(Arid): Stable oxygen-hydrogen isotopes reveal water use strategies of Tamarix taklamakanensis in the Taklimakan Desert, China

Arid

DOI	10.1007/s40333-020-0051-4
	Stable oxygen-hydrogen isotopes reveal water use strategies of Tamarix taklamakanensis in the Taklimakan Desert, China
	Dong, Zhengwu 1,2,3,4; Li, Shengyu1 ; Zhao, Ying 5; Lei, Jiaqiang1 ; Wang, Yongdong 1; Li, Congjuan 1
通讯作者	Li, Shengyu
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2020
卷号	12 期号:1 页码:115-129
英文摘要	Tamarix taklamakanensis, a dominant species in the Taklimakan Desert of China, plays a crucial role in stabilizing sand dunes and maintaining regional ecosystem stability. This study aimed to determine the water use strategies of T. taklamakanensis in the Taklimakan Desert under a falling groundwater depth. Four typical T. taklamakanensis nabkha habitats (sandy desert of Tazhong site, saline desert-alluvial plain of Qiemo site, desert-oasis ecotone of Qira site and desert-oasis ecotone of Aral site) were selected with different climate, soil, groundwater and plant cover conditions. Stable isotope values of hydrogen and oxygen were measured for plant xylem water, soil water (soil depths within 0-500 cm), snowmelt water and groundwater in the different habitats. Four potential water sources for T. taklamakanensis, defined as shallow, middle and deep soil water, as well as groundwater, were investigated using a Bayesian isotope mixing model. It was found that groundwater in the Taklimakan Desert was not completely recharged by precipitation, but through the river runoff from snowmelt water in the nearby mountain ranges. The surface soil water content was quickly depleted by strong evaporation, groundwater depth was relatively shallow and the height of T. taklamakanensis nabkha was relatively low, thus T. taklamakanensis primarily utilized the middle (23%+/- 1%) and deep (31%+/- 5%) soil water and groundwater (36%+/- 2%) within the sandy desert habitat. T. taklamakanensis mainly used the deep soil water (55%+/- 4%) and a small amount of groundwater (25%+/- 2%) within the saline desert-alluvial plain habitat, where the soil water content was relatively high and the groundwater depth was shallow. In contrast, within the desert-oasis ecotone in the Qira and Aral sites, T. taklamakanensis primarily utilized the deep soil water (35%+/- 1% and 38%+/- 2%, respectively) and may also use groundwater because the height of T. taklamakanensis nabkha was relatively high in these habitats and the soil water content was relatively low, which is associated with the reduced groundwater depth due to excessive water resource exploitation and utilization by surrounding cities. Consequently, T. taklamakanensis showed distinct water use strategies among the different habitats and primarily depended on the relatively stable water sources (deep soil water and groundwater), reflecting its adaptations to the different habitats in the arid desert environment. These findings improve our understanding on determining the water sources and water use strategies of T. taklamakanensis in the Taklimakan Desert.
英文关键词	Tamarix taklamakanensis water use strategies stable isotopes Bayesian isotope mixing model deep soil water groundwater Taklimakan Desert
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000522856000009
WOS关键词	POPULUS-EUPHRATICA ; RAMOSISSIMA ; GROWTH ; RESPONSES ; PLANTS ; GROUNDWATER ; PATTERN ; DUNES ; CONES ; RIVER
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所 ; 新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314885
作者单位	1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China; 2.Xinjiang Univ, Coll Resources & Environm Sci, Urumqi 830046, Peoples R China; 3.Xinjiang Normal Univ, Coll Life Sci, Urumqi 830054, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.Ludong Univ, Coll Resources & Environm Engn, Yantai 264025, Peoples R China
推荐引用方式 GB/T 7714	Dong, Zhengwu,Li, Shengyu,Zhao, Ying,et al. Stable oxygen-hydrogen isotopes reveal water use strategies of Tamarix taklamakanensis in the Taklimakan Desert, China[J]. 中国科学院新疆生态与地理研究所, 新疆大学,2020,12(1):115-129.
APA	Dong, Zhengwu,Li, Shengyu,Zhao, Ying,Lei, Jiaqiang,Wang, Yongdong,&Li, Congjuan.(2020).Stable oxygen-hydrogen isotopes reveal water use strategies of Tamarix taklamakanensis in the Taklimakan Desert, China.JOURNAL OF ARID LAND,12(1),115-129.
MLA	Dong, Zhengwu,et al."Stable oxygen-hydrogen isotopes reveal water use strategies of Tamarix taklamakanensis in the Taklimakan Desert, China".JOURNAL OF ARID LAND 12.1(2020):115-129.