干旱区生态环境知识资源中心(Arid): Ecological risk changes and their relationship with exposed surface fraction in the karst region of southern China from 1990 to 2020

Arid

DOI	10.1016/j.jenvman.2022.116206
	Ecological risk changes and their relationship with exposed surface fraction in the karst region of southern China from 1990 to 2020
	Pu, Junwei; Zhao, Xiaoqing; Huang, Pei; Gu, Zexian; Shi, Xiaoqian; Chen, Yanjun; Shi, Xinyu; Tao, Junyi; Xu, Yifei; Xiang, Aimeng
通讯作者	Zhao, XQ
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2022
卷号	323
英文摘要	Due to anthropogenic disturbances, the karst region in southern China is vulnerable to ecological problems such as soil erosion and surface exposure. However, limited studies on variations in large-scale ecological risk (ER) and their influencing factors, particularly the coupling/decoupling relationship with an exposed surface fraction (ESF), make ER regulations and ecological restoration challenging. The present study evaluates the ER of eight typical karst provinces in Southern China from 1990 to 2020 using the technique for order preference by sim-ilarity to an ideal solution (TOPSIS) model and ecosystem services (habitat quality, water yield, carbon storage, soil conservation, and food production), and extracts the contemporaneous ESF using Landsat satellite data in Google Earth Engine (GEE). The spatiotemporal change of ER and ESF are analyzed, and their coupling/ decoupling relationship and driving mechanism are explored using coupling coordination degree (CCD) and multi-scale geographically weighted regression (MGWR) models. The results show that: (1) Over the past 30 years, the ER has increased until 2010 and subsequently declined, with an increasing mean value (0.463-0.503), except in Chongqing municipality. The ESF decreased significantly (the mean value dropped from 44.7% to 38.7%), except that in Sichuan province. (2) The average CCD between ER and ESF decreased with fluctuation of-0.017, with a decoupling relationship (58.18%). The coupling area is larger than the decoupling area in the Sichuan area, while other provinces are opposite. (3) The coupling/decoupling relationship in the study area is mainly driven by terrain (elevation, slope) and socio-economic (population density, per capita GDP) factors. More attention should be paid to the role of these factors in the continuous reduction and control of ESF and ER. This study can serve as a reference for similar studies in karst regions, such as risk assessment and surface monitoring, rocky desertification control, ecological engineering layout, and territorial planning.
英文关键词	Ecological risk Exposed surface fraction Coupling decoupling relationship Spatiotemporal change Driving mechanism Karst region in China
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000862593500001
WOS关键词	ECOSYSTEM SERVICES ; ROCKY DESERTIFICATION ; LAND-USE ; ENVIRONMENT ; REGRESSION ; SYNERGIES ; PROJECTS ; TOURISM ; DRIVEN ; AREA
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393423
推荐引用方式 GB/T 7714	Pu, Junwei,Zhao, Xiaoqing,Huang, Pei,et al. Ecological risk changes and their relationship with exposed surface fraction in the karst region of southern China from 1990 to 2020[J],2022,323.
APA	Pu, Junwei.,Zhao, Xiaoqing.,Huang, Pei.,Gu, Zexian.,Shi, Xiaoqian.,...&Xiang, Aimeng.(2022).Ecological risk changes and their relationship with exposed surface fraction in the karst region of southern China from 1990 to 2020.JOURNAL OF ENVIRONMENTAL MANAGEMENT,323.
MLA	Pu, Junwei,et al."Ecological risk changes and their relationship with exposed surface fraction in the karst region of southern China from 1990 to 2020".JOURNAL OF ENVIRONMENTAL MANAGEMENT 323(2022).