基于格局-质量-功能的高寒草甸区生态脆弱性分析——以云南迪庆为例

Ecological vulnerability analysis of alpine meadow area based on pattern-quality-function ratio:take Diqing in Yunnan as an example

以滇西北高寒草甸区为研究对象,通过建立格局-质量-功能框架开展其生态系统脆弱性时空特征评价,并利用地理加权回归模型分析各因子对生态系统脆弱性变化的空间异质性影响.结果表明:滇西北高寒草甸区生态系统脆弱性指数(EVI)格局由北向南递减.2000~2020年迪庆北部地区的生态系统脆弱性指数呈增加趋势,生态脆弱性性指数最高增加了0.30,中南部绝大部分地区呈下降趋势.影响因子对生态系统脆弱性敏感性显著,气候因子对迪庆北部和南部地区的生态系统脆弱性敏感,经济(GDP)、人口(POP)等因子是导致区域生态系统脆弱性指数增加的主要因素.

This study established a pattern-quality-function framework to evaluate the spatial and temporal characteristics of ecosystem vulnerability in the alpine meadow area of northwestern Yunnan Province.Additionally,a geographically weighted regression(GWR)model was utilized to analyze the spatial heterogeneity of driving factors on ecosystem vulnerability changes.The results showed that:(1)The ecosystem vulnerability index(EVI)decreases from north to south in the alpine meadow area of northwest Yunnan.(2)From 2000 to 2020,the ecosystem vulnerability index in the northern part of Diqing showed an increasing trend,with a maximum increase of 0.30,while a decreasing trend was detected in most areas in the central and southern parts of the region.(3)The influencing factors have significant impacts on the ecosystem vulnerability.The climate factors were sensitive to ecosystem vulnerability in the northern and southern parts of Diqing.Factors such as economic(GDP)and population(POP)were the main contributors to increasing the regional ecosystem vulnerability.