气候变化领域集成服务门户(CCPortal): Variations in water use strategies of sand-binding vegetation along a precipitation gradient in sandy regions, northern China

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DOI	10.1016/j.jhydrol.2021.126539
	Variations in water use strategies of sand-binding vegetation along a precipitation gradient in sandy regions, northern China
	Ma, Xiaofei; Zhu, Jianting; Wang, Yong; Yan, Wei; Zhao, Chengyi
通讯作者	Zhao, CY (通讯作者)
发表日期	2021
ISSN	0022-1694
EISSN	1879-2707
卷号	600
英文摘要	Water is the most important factor limiting the growth of sand-binding vegetation (SBV) in desert ecosystems. This study explored the water sources and water use strategies of SBV under a natural precipitation gradient. Six typical SBV species were selected, comprising three tree species, Pinus sylvestris, Haloxylon ammodendron and Populus euphratica, and three shrub species, Artemesia ordosica, Caragana korshinshii and Tmarbc ramosissima. The stable isotope values (delta D, delta O-18) of xylem water and potential water sources (precipitation, soil water, and groundwater) of these species under a precipitation gradient in the sandy regions of northern China were measured. In addition, the relative contributions of the different potential water sources to water use by SBV were analyzed using the MixSIAR model. The results indicated that the Local Meteoric Water Lines (LMWLs) of the six SBV species were located on the right side of the Global Meteoric Water Line (GMWL), with the degree of deviation gradually increasing with a decrease in precipitation. The results showed that T. ramosissima, H. ammodendron and P. euphratica mainly used groundwater (GW), whereas P. sylvestris, A. ordosica and C. korshinshii mainly used soil water. Among those species using soil water, P. sylvestris and A. ordosica mainly used shallow soil water (20-80 cm). P. sylvestris and C. korshinshii showed the highest soil water utilization rate of 14%, whereas P. euphratica showed the lowest soil water utilization rate of 2%. The different SBV species showed significantly different soil water utilization rates due to the influence of plant mot distribution (p < 0.001). Among the six SBV species, trees showed a higher GW utilization rate compared to shrubs at 65.74% and 47.29%, respectively, whereas shrubs showed a higher deep soil water utilization rate (140-200 cm) compared to trees at 65.74% and 47.29%, respectively. The precipitation utilization rates amongst the six SBV species were highest in spring, followed by autumn and summer. The utilization of GW by SBV will be intensified in the future due to climate change. However, the stability of T. ramosissima may pose a threat due to its low utilization rate of GW.
关键词	SYLVESTRIS VAR. MONGOLICA GLOBAL WARMING SCENARIOS 1.5 DEGREES-C SOIL-WATER STABLE-ISOTOPES DEUTERIUM EXCESS CLIMATE-CHANGE GROUNDWATER DEPTH UPTAKE PATTERNS TENGGER DESERT
英文关键词	Stable isotopes; Sandy soils; Sand-binding vegetable; Water source; Northern China
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000685246900045
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260461
推荐引用方式 GB/T 7714	Ma, Xiaofei,Zhu, Jianting,Wang, Yong,et al. Variations in water use strategies of sand-binding vegetation along a precipitation gradient in sandy regions, northern China[J]. 中国科学院青藏高原研究所,2021,600.
APA	Ma, Xiaofei,Zhu, Jianting,Wang, Yong,Yan, Wei,&Zhao, Chengyi.(2021).Variations in water use strategies of sand-binding vegetation along a precipitation gradient in sandy regions, northern China.JOURNAL OF HYDROLOGY,600.
MLA	Ma, Xiaofei,et al."Variations in water use strategies of sand-binding vegetation along a precipitation gradient in sandy regions, northern China".JOURNAL OF HYDROLOGY 600(2021).