干旱区生态环境知识资源中心(Arid): Water sources for typical desert vegetation in the Ebinur Lake basin

Arid

DOI	10.1007/s11442-022-1987-4
	Water sources for typical desert vegetation in the Ebinur Lake basin
	Hao, Shuai; Li, Fadong
通讯作者	Li, FD
来源期刊	JOURNAL OF GEOGRAPHICAL SCIENCES
ISSN	1009-637X
EISSN	1861-9568
出版年	2022
卷号	32 期号:6 页码:1103-1118
英文摘要	In arid and semi-arid environments, desert vegetation plays an important role in preventing soil erosion by wind and helps maintain the stability of desert and oasis ecosystems. Four types of typical desert vegetation, namely Populus euphratica, Haloxylon ammodendron, Nitraria sibirica, and Halostachs caspica, corresponding to different habitats (i.e., river bank, sand dune, desert, and salt marsh) were chosen as the model vegetation in this research. The delta H-2 and delta O-18 for rainwater, soil water, and plant water were applied to identify the water sources and quantify the proportions of different water sources used over the entire plant growth period (from March to October). The results showed that the precipitation delta H-2 and delta O-18 in the Ebinur Lake basin varied from -142.5 parts per thousand to -0.6 parts per thousand and from -20.16 parts per thousand to 1.20 parts per thousand, respectively. The largest delta H-2 and delta O-18 values occurred in summer and the smallest in winter. The soil water delta H-2 and delta O-18 of the four habitats decreased gradually with increasing depth. The delta H-2 and delta O-18 values of water extracted from the stems of the four plants had similar variation trends, that is, the maximum was observed in spring and the minimum in summer. Among the four plants, H. caspica had the highest stable isotopic values in the stem water, followed by N. sibirica, H. ammodendron, and P. euphratica. The water sources and utilization ratios of desert vegetation varied across different growth stages. Throughout the growing period, H. ammodendron mainly used groundwater, whereas the water source proportions used by N. sibirica varied greatly throughout the growing season. In spring, plants mainly relied on surface soil water, with a contribution rate of 80%-94%. However, in summer, the proportion of deep soil water used was 31%-36%; and in autumn, the proportion of middle soil water used was 33%-36%. H. caspica mainly relied on topsoil water in spring and autumn, and the proportion of soil water in the middle layer slightly increased to 20%-36% in summer. P. euphratica mainly used intermediate soil water in spring with a utilization rate of 53%-54%. In summer, groundwater was the main source, with a utilization rate of 72%-88%, and only 2%-5% came from river water, whereas in autumn, the river water utilization rate rose to 11%-21%. The results indicated that there were significant differences in water use sources during the growing period for desert vegetation in arid areas. This research provides a theoretical basis for understanding water use mechanisms, water adaptation strategies, and vegetation restoration and management in arid areas.
英文关键词	desert vegetation water use stable isotopes of hydrogen and oxygen Ebinur Lake basin
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000797529200006
WOS关键词	USE STRATEGIES ; USE PATTERNS ; SHRUBS ; GRADIENT ; AREA
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393449
推荐引用方式 GB/T 7714	Hao, Shuai,Li, Fadong. Water sources for typical desert vegetation in the Ebinur Lake basin[J],2022,32(6):1103-1118.
APA	Hao, Shuai,&Li, Fadong.(2022).Water sources for typical desert vegetation in the Ebinur Lake basin.JOURNAL OF GEOGRAPHICAL SCIENCES,32(6),1103-1118.
MLA	Hao, Shuai,et al."Water sources for typical desert vegetation in the Ebinur Lake basin".JOURNAL OF GEOGRAPHICAL SCIENCES 32.6(2022):1103-1118.