基于生态安全格局与生态脆弱性评价的生态修复关键区域识别与诊断——以汶上县为例

Identification and diagnosis of critical areas for ecological rehabilitation based on eco-security patterns and ecological vulnerability assessment-a case study over Wenshang County

以山东省济宁市汶上县为研究区,基于最小阻力模型构建生态安全格局,结合脆弱性评价识别生态修复关键区域,对关键区域分类提出针对性修复保护措施.结果表明在汶上县共识别出11处生态源地,总面积38.72km^(2),35条生态廊道,总长度259.56km;生态脆弱性分级以中度脆弱与低度脆弱为主,两类型区域总面积594.32km^(2),占比67.40%.中部城区脆弱性较高,西南洼地脆弱性较低;识别出生态修复关键区域5处,总面积107.14km^(2),分布于中部城区及周边;根据区位特征将关键区域分为三类,并分类别提出其生态修复策略,以期为国土空间生态修复提供参考.

Selecting Wenshang County,Jining,Shandong Province as the study area,ecological security pattern was constructed based on the minimum resistance model,then the critical areas of ecological restoration were identified by using vulnerability assessment.Finally this study makes recommendations for protecting and restorating the ecology of the critical areas respectively.The results showed that Wenshang County contained 11ecological source areas,occupying 38.72km^(2),this county also had 35 ecological corridors with total length of 259.55km;the moderate and severe vulnerability area(594.32km^(2))dominated and shared 67.64%of total study area in Wenshang County.What’s more,the vulnerability of the central urban area was relatively high,and vulnerability of the southwestern low-lying area was low.In addition,five key areas of ecological restoration were identified,with a total area of 107.14km^(2),and they were mainly distributed in and around the central urban area.According to the location characteristics,these key areas were divided into three categories,and the strategies of ecological restoration were put forward separately to provide references for the overall protection and restoration of the ecosystem.