气候变化领域集成服务门户(CCPortal): Spatiotemporal Evaluation and Driving Mechanism of Land Ecological Security in Yan'an, a Typical Hill-Gully Region of China's Loess Plateau, from 2000 to 2018

CCPortal

DOI	10.3390/f12121754
	Spatiotemporal Evaluation and Driving Mechanism of Land Ecological Security in Yan'an, a Typical Hill-Gully Region of China's Loess Plateau, from 2000 to 2018
	He, Zhaoquan; Shang, Xue; Zhang, Tonghui
通讯作者	He, ZQ (通讯作者)，Yanan Univ, Sch Life Sci, Yanan 716000, Peoples R China. ; He, ZQ (通讯作者)，Yanan Key Lab Ecol Restorat, Yanan 716000, Peoples R China. ; He, ZQ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730030, Peoples R China.
发表日期	2021
EISSN	1999-4907
卷号	12 期号:12
英文摘要	Forest landscape restoration and ecosystem of Loess Plateau have enhanced prominently, since the policy implementation (1999) of the Grain for Green Project in China. Land ecological security (LES) performs an extremely critical function for protecting vulnerable land resources and sustaining forest ecosystem stability. Predecessors' studies substantially concentrate on biophysical and meteorologic variables using numerous grounded methodologies, little research has been launched on systematic natural-socio-economic-ecological relationships and how these contributions and regulations for LES evaluation. Here, pressure-state-response (PSR) model was used to establish the evaluation system of LES in regional-scale, and LES was classified into five levels measured by ecological security index (S), including high (S >= 0.75), medium-high (0.65 <= S < 0.75), medium (0.55 <= S < 0.65), medium-low (0.45 <= S < 0.55), and low (S < 0.45) level, for systematically analyzing its spatiotemporal distribution characteristic and response mechanism to explanatory variables in Yan'an, northwest China, from 2000 to 2018. The results demonstrated that: (1) LES status was mainly characterized by medium-high level and medium level, and maintained profound stability. (2) zone with medium-high LES level was mainly concentrated in western and southern regions, continuously expanding to northeast regions, and possessed the largest territorial area, accounting for 37.22-46.27% of the total area in Yan'an. (3) LES was primarily susceptible to normalized differential vegetation index, vegetation coverage, and land surface temperature with their optimal impacting thresholds of 0.20-0.64, 0.20-0.55, and 11.20-13.00 degrees C, respectively. (4) Normalized differential vegetation index and vegetation coverage had a significant synergistic effect upon LES based on their interactive explanation rate of 31% and had significant variation consistency (positive and negative) with LES, which were powerfully suggested to signal the intensification of the regional eco-security level in the persistent eco-greening process.
关键词	ANTHROPOGENIC CHANGES ECOSYSTEM SERVICES CLIMATE-CHANGE RIVER-BASIN VEGETATION NDVI FOREST DYNAMICS COVER PERSPECTIVES
英文关键词	forest ecosystem; PSR model; land security; natural-socio-economic-ecological systems; Yan'an
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:000738462300001
来源期刊	FORESTS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253769
作者单位	[He, Zhaoquan; Shang, Xue] Yanan Univ, Sch Life Sci, Yanan 716000, Peoples R China; [He, Zhaoquan; Shang, Xue] Yanan Key Lab Ecol Restorat, Yanan 716000, Peoples R China; [He, Zhaoquan; Zhang, Tonghui] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730030, Peoples R China
推荐引用方式 GB/T 7714	He, Zhaoquan,Shang, Xue,Zhang, Tonghui. Spatiotemporal Evaluation and Driving Mechanism of Land Ecological Security in Yan'an, a Typical Hill-Gully Region of China's Loess Plateau, from 2000 to 2018[J]. 中国科学院西北生态环境资源研究院,2021,12(12).
APA	He, Zhaoquan,Shang, Xue,&Zhang, Tonghui.(2021).Spatiotemporal Evaluation and Driving Mechanism of Land Ecological Security in Yan'an, a Typical Hill-Gully Region of China's Loess Plateau, from 2000 to 2018.FORESTS,12(12).
MLA	He, Zhaoquan,et al."Spatiotemporal Evaluation and Driving Mechanism of Land Ecological Security in Yan'an, a Typical Hill-Gully Region of China's Loess Plateau, from 2000 to 2018".FORESTS 12.12(2021).