干旱区生态环境知识资源中心(Arid): Long-term continuous changes of vegetation cover in desert oasis of a hyper-arid endorheic basin with LandTrendr algorithm

Arid

DOI	10.1016/j.ecolind.2024.112418
	Long-term continuous changes of vegetation cover in desert oasis of a hyper-arid endorheic basin with LandTrendr algorithm
	Shen, Qin; Gao, Guangyao; Duan, Yixuan; Chen, Ling
通讯作者	Gao, GY
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2024
卷号	166
英文摘要	Ecological water diversion projects (EWDP) is one of the most important initiatives for oases restoration in arid endorheic basins. Fine monitoring of the long-term and continuous changes in vegetation cover before and after the EWDP is important to evaluate the effects of EWDP on ecosystem restoration. In this study, a trajectory-based change detection approach was applied with the Landsat-based detection of trends in disturbance and recovery (LandTrendr) algorithm on Google Earth Engine to map vegetation cover change trajectories in Ejina Oasis in the lower Heihe River Basin of China during 1990-2020. In addition to monotonic changes (i.e., continuous greening and continuous browning), LandTrendr also can flexibly capture the breaks of greening or browning events, including the greening with negative break, browning with positive break, browning to greening, and greening to browning. These changes mainly happened in shrub land and the area with land use transition. Approximately 82 % of the oasis ecosystem has been restored by the implementation of EWDP since 2000. However, in the past decade, the EWDP also caused some negative effects on vegetation cover in some areas. Both the categories of browning with positive break and greening to browning became widespread after 2010, with the cumulative proportions accounting for 79.4 % and 70.1 % of each category. The mean magnitude and slope of change in NDVI in these two categories after 2010 were -0.03 and -0.008 yr- 1, -0.12 and -0.035 yr- 1, respectively. This research demonstrated that the proposed approach was effective and useful for continuously monitoring the timing and extent of vegetation recovery processes in the hyper-arid endorheic basin. The EWDP plays an important role in vegetation restoration, but we also need to continuously monitor negative impacts which are crucial for environmental assessment and policy making in the arid endorheic basin.
英文关键词	Vegetation cover LandTrendr Disturbance tracking Ecological water diversion project Arid endorheic basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001284009300001
WOS关键词	LANDSAT TIME-SERIES ; HEIHE RIVER-BASIN ; WATER SECURITY ; FOREST DISTURBANCE ; LOWER REACHES ; CHINA ; IMPACTS ; CLIMATE ; RESTORATION ; CHALLENGES
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403422
推荐引用方式 GB/T 7714	Shen, Qin,Gao, Guangyao,Duan, Yixuan,et al. Long-term continuous changes of vegetation cover in desert oasis of a hyper-arid endorheic basin with LandTrendr algorithm[J],2024,166.
APA	Shen, Qin,Gao, Guangyao,Duan, Yixuan,&Chen, Ling.(2024).Long-term continuous changes of vegetation cover in desert oasis of a hyper-arid endorheic basin with LandTrendr algorithm.ECOLOGICAL INDICATORS,166.
MLA	Shen, Qin,et al."Long-term continuous changes of vegetation cover in desert oasis of a hyper-arid endorheic basin with LandTrendr algorithm".ECOLOGICAL INDICATORS 166(2024).