青海省生态安全水平动态演化特征及影响因素研究
Dynamic evolution characteristics and influencing factors of ecological security level in Qinghai Province
贾天朝 1胡西武 2杨海娟3
作者信息
- 1. 宁夏大学民族与历史学院,宁夏银川 750021
- 2. 青海民族大学经济与管理学院,青海西宁 810007;天津大学-青海民族大学双碳研究院,青海西宁 810007
- 3. 宁夏大学新华学院,宁夏银川 750000
- 折叠
摘要
为探究青海省生态安全水平时空变化情况,筑牢国家生态安全屏障,通过土地利用、Landsat影像等遥感地理数据以及经济社会发展相关数据,基于改进的生态支撑力(ESC)模型,运用熵权TOPSIS、核密度估计、标准差椭圆模型、障碍度模型、地理探测器,研究青海省生态安全时空动态演化特征和影响因素.结果表明:(1)1990-2020年青海省生态安全水平呈波动式上升态势,处于生态平稳区的市州占87.50％,处于生态改善区的市州占12.50％.(2)全省生态安全水平呈现"东西生态双核"空间分布和"东西延展、南北收缩"空间演化特征,两极化趋势明显.(3)从内部因素来看,青海省生态安全最大的准则层障碍因子是生态结构,主要的指标层障碍因子为叶面积指数和景观破碎度;从外部因素看,政府干预力度、城镇化率、人口密度、人均GDP、产业结构对青海省生态安全的作用显著.
Abstract
In order to explore the spatiotemporal changes in the ecological security level of Qinghai Province and build a national ecological security barrier,through remote sensing geographical data such as land use and Landsat images,as well as data related to economic and social development,based on the im-proved ecological support force(ESC)model,the entropy weight TOPSIS,kernel density,standard devia-tion elliptical model,obstacle degree model,and geographical detectors were used to study the spatiotem-poral dynamic evolution characteristics and influencing factors of ecological security in Qinghai Province.The results show that:(1)From 1990 to 2020,the ecological security level of Qinghai Province showed a fluctuating upward trend,with 87.50％of the cities and states in the ecological stable zone and 12.50％of the cities and states in the ecological improvement zone.(2)The province's ecological security level shows the spatial distribution characteristics of"east-west ecological dual core"and"east-west extension and north-south contraction"spatial evolution characteristics,with an obvious polarization trend.(3)From the perspective of internal factors,the largest criterion-level obstacle factor to ecological security in Qinghai Province is ecological structure,and the most important indicator-level obstacle factors are leaf area index and landscape fragmentation.From the perspective of external factors,government intervention,urbaniza-tion rate,population density,per capita GDP,and industrial structure play a significant role in the ecolog-ical security of Qinghai Province.
关键词
生态安全/生态支撑力/动态演化特征/影响因素/人与自然和谐共生Key words
ecological security/ecological support force/dynamic evolution characteristic/influencing factor/harmonious coexistence between human and nature引用本文复制引用
出版年
2024
NETL
NSTL
万方数据