基于生态系统服务供需的生态安全格局构建OACHSSCD

The balance between the supply and demand of ecosystem services is a central mechanism for advancing regional sustainability.Building an ecological security framework based on this principle can effectively coordinate the relationship between regional ecological security and human well-being.Taking Beijing's ecological conservation zones as a case,six representative ecosystem services:water production,food provision,carbon storage,soil conservation,recreation,and habitat quality,are selected to quantitatively assess the supply and demand of these services by integrating the ArcGIS,In VEST model,and POI crawlers.Morphological Spatial Pattern Analysis(MSPA)and circuit theory are used to derive an ecological security pattern.Results indicate:1)Considerable spatial variation is evident in the distribution of ecosystem services supply and demand within Beijing's ecological conservation areas.High-supply zones are concentrated in forested suburban areas like Huairou and Fangshan,while high-demand zones cluster in densely populated urban districts.2)Seventy ecological source areas were identified,covering a total area of 1,720.80km2,including two major clusters in Huairou and Fangshan,with the remaining scattered along peripheral zones.3)131 ecological corridors were extracted,with wide150m,20 ecological pinch points and 42 ecological barrier point.4)Ecological pinch points along long-distance corridors spanning Changping District should be protected priorly.Obstructions on short-distance corridors within the Huairou and Fangshan clusters should be cleared through ecological restoration to enhance the overall stability and resilience of the ecological security framework.This research offers scientific guidance for strengthening ecological security barriers in conservation zones and advancing ecological protection and green development.