干旱区生态环境知识资源中心(Arid): Seasonal water sources and response to precipitation events of Calligonum mongolicum at the oasis margin in the Hexi River Corridor

Arid

DOI	10.1002/hyp.15132
	Seasonal water sources and response to precipitation events of Calligonum mongolicum at the oasis margin in the Hexi River Corridor
	Chen, Weiwei; Chen, Guopeng; Feng, Xiangyan; Zhou, Hai; Yang, Qiyue
通讯作者	Chen, GP
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2024
卷号	38 期号:3
英文摘要	Calligonum mongolicum is often planted as a windbreak and for sand stabilization on mobile and semi-mobile sand dunes in extremely arid regions. However, water availability remains a key limiting factor for its survival and population expansion, and water use strategies and responses to precipitation events of this species are unknown. Here, we determined water use strategy of C. mongolicum under extreme arid conditions by measuring the oxygen stable isotopes (delta D and delta O-18) in xylem water and in potential water sources (precipitation, soil water, and groundwater). We used the IsoSource model to determine the relative contributions of different water sources to water utilization by C. mongolicum. Our results showed that: (1) water sources used by C. mongolicum exhibited seasonal variability, with shallow soil water accounting for 42% of utilization during early spring (April), and deep soil water and groundwater being predominantly used during the summer and autumn and accounting for 61%-84% of utilization, (2) C. mongolicum did not respond to small precipitation events, but responded significantly to large precipitation events. C. mongolicum maintained the utilization of soil water in all layers at 74%-81% of deep soil water and groundwater before a 5.8 mm precipitation event. A precipitation event of 18.8 mm increased the contribution of surface water from 4% before to 17% after precipitation, indicating that C. mongolicum has a strong capacity for self-regulation and adaptation; namely, C. mongolicum is capable of developing an optimal phenotype through self-regulation, thereby maximizing water acquisition.
英文关键词	Calligonum mongolicum ecological protection Hexi corridor precipitation event stable isotope water sources
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001190271000005
WOS关键词	SOIL-WATER ; DROUGHT ; DESERT ; PLANTS ; HYDROGEN ; ISOTOPES ; DYNAMICS ; SHRUBS
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404113
推荐引用方式 GB/T 7714	Chen, Weiwei,Chen, Guopeng,Feng, Xiangyan,et al. Seasonal water sources and response to precipitation events of Calligonum mongolicum at the oasis margin in the Hexi River Corridor[J],2024,38(3).
APA	Chen, Weiwei,Chen, Guopeng,Feng, Xiangyan,Zhou, Hai,&Yang, Qiyue.(2024).Seasonal water sources and response to precipitation events of Calligonum mongolicum at the oasis margin in the Hexi River Corridor.HYDROLOGICAL PROCESSES,38(3).
MLA	Chen, Weiwei,et al."Seasonal water sources and response to precipitation events of Calligonum mongolicum at the oasis margin in the Hexi River Corridor".HYDROLOGICAL PROCESSES 38.3(2024).