干旱区生态环境知识资源中心(Arid): Spatio-temporal patterns of oasis dynamics in China's drylands between 1987 and 2017

Arid

DOI	10.1088/1748-9326/ac740b
	Spatio-temporal patterns of oasis dynamics in China's drylands between 1987 and 2017
	Chen, Peng; Wang, Shuai; Liu, Yanxu; Wang, Yaping; Li, Zidong; Wang, Yijia; Zhang, Haoyu; Zhang, Yaosheng
通讯作者	Wang, S
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2022
卷号	17 期号:6
英文摘要	Oases are among the most productive and vulnerable ecosystems on drylands as well as central areas of human life and economic development. In China, oasis expansion and degradation are directly related to the survival and development of tens of millions of inhabitants who live within them, profoundly affecting human well-being. However, our understanding of the spatiotemporal dynamics of China's oases has been limited. This creates a challenge to accurately assess the environmental impacts of oasis dynamics and sustainable oasis development. Here we analyzed Landsat images (5 TM, 7 ETM+, and 8 OIL, similar to 61 900 images) over the period 1987-2017, and we produced annual maps of China's oases (30 m spatial resolution) using trajectories and spectral-temporal segmentation algorithm (LandTrendr) and machine-learning methods (Random Forest). We found that oasis areas increased significantly between 1987 and 2017 (+8.82 Mha). Grasslands and croplands expanded the most, and reclamation of deserts and grasslands made cropland the largest gainer. At the provincial scale, oasis expansion in Inner Mongolia and Qinghai was mainly attributed to grassland restoration. In Xinjiang, Gansu, and Ningxia, reclamation of croplands was also an important factor in addition to grassland restoration. With the expansion of the oasis similar to 73.36% of areas showed decreasing trends of soil moisture, and even desertification in some areas. The overexpansion of oases might cause a great challenge to regional water security. Our dataset and results can provide a basis for identifying trade-off areas/regions between development benefits and environmental impacts, helping policymakers to identify high-priority areas for intervention and reasonably plan land-use spatial structure in oasis areas for sustainable development of oases.
英文关键词	spatiotemporal processes driving factors land cover change LandTrendr Landsat
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000806523000001
WOS关键词	ECOSYSTEM SERVICES ; RIVER-BASIN ; MANAGEMENT ; CROPLAND ; REGION ; AREA ; SUSTAINABILITY ; EVOLUTION ; EXPANSION
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392506
推荐引用方式 GB/T 7714	Chen, Peng,Wang, Shuai,Liu, Yanxu,et al. Spatio-temporal patterns of oasis dynamics in China's drylands between 1987 and 2017[J],2022,17(6).
APA	Chen, Peng.,Wang, Shuai.,Liu, Yanxu.,Wang, Yaping.,Li, Zidong.,...&Zhang, Yaosheng.(2022).Spatio-temporal patterns of oasis dynamics in China's drylands between 1987 and 2017.ENVIRONMENTAL RESEARCH LETTERS,17(6).
MLA	Chen, Peng,et al."Spatio-temporal patterns of oasis dynamics in China's drylands between 1987 and 2017".ENVIRONMENTAL RESEARCH LETTERS 17.6(2022).