气候变化领域集成服务门户(CCPortal): Plant drought adaptation strategies regulate alpine grassland water yield in the Qinghai Lake Basin, northeastern Qinghai-Tibet Plateau

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DOI	10.1016/j.ejrh.2023.101470
	Plant drought adaptation strategies regulate alpine grassland water yield in the Qinghai Lake Basin, northeastern Qinghai-Tibet Plateau
	Li, Zhongkai; Li, Xiaoyan; Yang, Shuhui
发表日期	2023
EISSN	2214-5818
卷号	48
英文摘要	Study region: The Qinghai Lake Basin, northeast Qinghai-Tibetan Plateau.Study focus: Vegetation dynamic induced change on catchment water yield (including surface runoff and groundwater runoff) is one of the research hotspots in the field of hydrology and ecology. However, few studies have explored the underlying biological mechanism by which plant regulate water yield. In this study, we examined the impact of different plant drought adaptation strategies on watershed water yield in the Qinghai Lake Basin, using both the ecohydrological model, water balance method and surface runoff experiments.New hydrological insights: we defined two type of plant drought adaptation strategies: droughtavoiding strategy can maximize the soil moisture and therefore minimize vegetation water stress, while drought-tolerating strategy tends to increase productivity by tolerating a certain degree of water stress. The result shows that plants employing drought-avoiding strategy have significantly higher water yield and water yield coefficient (the ratio of water yield to precipitation) than plants adopting drought-tolerating strategy, regardless of meadow or steppe species. Meanwhile, for all grassland species in the study region, plants with drought-avoiding strategy have less vegetation cover and net primary productivity than plants with drought-tolerating strategy, which reflect the trade-off between avoiding water stress and achieving competitive advantages. Our findings offer insights into the biological mechanism by which vegetation regulates water yield, and provide vital guidance for watershed management.
关键词	Plant drought adaptation Basin water yield Eagleson 's ecohydrological model
英文关键词	SOIL; VEGETATION; CLIMATE; TOLERANCE; SEEDLINGS; GRADIENT; DATASET; IMPACT; SAVER; LINKS
WOS研究方向	Water Resources
WOS记录号	WOS:001054819500001
来源期刊	JOURNAL OF HYDROLOGY-REGIONAL STUDIES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283486
作者单位	Beijing Normal University; Beijing Normal University; Qinghai Normal University; Beijing Normal University
推荐引用方式 GB/T 7714	Li, Zhongkai,Li, Xiaoyan,Yang, Shuhui. Plant drought adaptation strategies regulate alpine grassland water yield in the Qinghai Lake Basin, northeastern Qinghai-Tibet Plateau[J],2023,48.
APA	Li, Zhongkai,Li, Xiaoyan,&Yang, Shuhui.(2023).Plant drought adaptation strategies regulate alpine grassland water yield in the Qinghai Lake Basin, northeastern Qinghai-Tibet Plateau.JOURNAL OF HYDROLOGY-REGIONAL STUDIES,48.
MLA	Li, Zhongkai,et al."Plant drought adaptation strategies regulate alpine grassland water yield in the Qinghai Lake Basin, northeastern Qinghai-Tibet Plateau".JOURNAL OF HYDROLOGY-REGIONAL STUDIES 48(2023).