气候变化领域集成服务门户(CCPortal): Regulation of Vegetation and Evapotranspiration by Water Level Fluctuation in Shallow Lakes

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DOI	10.3390/w13192651
	Regulation of Vegetation and Evapotranspiration by Water Level Fluctuation in Shallow Lakes
	Liu, Qiang; Liang, Liqiao; Yuan, Xiaomin; Yan, Sirui; Li, Miao; Li, Shuzhen; Wang, Xuan; Li, Chunhui
通讯作者	Liu, Q (通讯作者)
发表日期	2021
EISSN	2073-4441
卷号	13 期号:19
英文摘要	Water level fluctuations play a critical role in regulating vegetation distribution, composition, cover and richness, which ultimately affect evapotranspiration. In this study, we first explore water level fluctuations and associated impacts on vegetation, after which we assess evapotranspiration (ET) under different water levels. The normalized difference vegetation index (NDVI) was used to estimate the fractional vegetation cover (F-v), while topography- and vegetation-based surface-energy partitioning algorithms (TVET model) and potential evaporation (E-v) were used to calculate ET and water evaporation (E-p). Results show that: (1) water levels were dramatically affected by the combined effect of ecological water transfer and climate change and exhibited significant decreasing trends with a slope of -0.011 m a(-2); and (2) as predicted, there was a correlation between water level fluctuation at an annual scale with Phragmites australis (P. australis) cover and open-water area. Water levels also had a controlling effect on F-v values, an increase in annual water levels first increasing and then decreasing F-v. However, a negative correlation was found between F-v values and water levels during initial plant growth stages. (iii) ET, which varied under different water levels at an annual scale, showed different partition into transpiration from P. australis and evaporation from open-water area and soil with alterations between vegetation and open water. All findings indicated that water level fluctuations controlled biological and ecological processes, and their structural and functional characteristics. This study consequently recommends that specifically-focused ecological water regulations (e.g., duration, timing, frequency) should be enacted to maintain the integrity of wetland ecosystems for wetland restoration.
关键词	AQUATIC VEGETATION ECOLOGICAL RESTORATION REGIME POPULATION WETLANDS CLIMATE SHIFTS COVER
英文关键词	shallow lake; water level fluctuation; fractional vegetation cover; evapotranspiration
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
WOS类目	Environmental Sciences ; Water Resources
WOS记录号	WOS:000710236600001
来源期刊	WATER
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/260125
推荐引用方式 GB/T 7714	Liu, Qiang,Liang, Liqiao,Yuan, Xiaomin,et al. Regulation of Vegetation and Evapotranspiration by Water Level Fluctuation in Shallow Lakes[J]. 中国科学院青藏高原研究所,2021,13(19).
APA	Liu, Qiang.,Liang, Liqiao.,Yuan, Xiaomin.,Yan, Sirui.,Li, Miao.,...&Li, Chunhui.(2021).Regulation of Vegetation and Evapotranspiration by Water Level Fluctuation in Shallow Lakes.WATER,13(19).
MLA	Liu, Qiang,et al."Regulation of Vegetation and Evapotranspiration by Water Level Fluctuation in Shallow Lakes".WATER 13.19(2021).