基于景观连通性的森林保护与恢复优先区域识别--以丁青县为例

Identification of Priority Areas for Forest Conservation and Restoration Based on Landscape Connectivity:A Case Study of Dengqen County

保护和提升景观连通性被广泛认为是森林景观管理的主要目标之一。基于景观连通性原理,采用连通概率及斑块重要值,对研究区森林斑块重要性进行分析,确定现有森林斑块的保护优先级和潜在森林斑块的恢复优先级。结果显示:森林斑块重要值总体上与距离阈值呈正相关,且小斑块森林重要性随着距离阈值的增加而逐渐提高;森林斑块重要性被划分为“非常高”“高”“中等”“低”“非常低”5个等级,其中具有“非常高”和“高”等级的3个现有森林斑块和4个潜在森林斑块对于保障和提高森林连通性起重要作用,应优先加强对这些重点斑块的保护与恢复力度;对于扩散距离较大的林栖物种,应因地制宜保护和恢复“中等”“低”“非常低”等级的现有森林斑块和潜在森林斑块。研究方法能够精准识别重要森林斑块,从而为区域森林保护与恢复规划提供参考。

Conservation and enhancement of landscape connectivity is widely recognized as one of the main goals of forest landscape management. Based on the principle of landscape connectivity, this study analyzes the importance of forest patches in the study area using probability of connectivity and patch importance values, and determines the conservation priority of existing forest patches and the restoration priority of potential forest patches. The results show that the forest patch importance values are generally positively correlated with distance thresholds, and that the importance of small patch forests gradually increases with increasing distance thresholds. Importance of forest patches is classified as five levels of "very high", "high", "medium", "low" and "very low", among which three existing forest patches and four potential forest patches with "very high" and "high" levels play an important role in ensuring and improving forest connectivity, and priority should be given to strengthen the protection and restoration of these key patches. For forest dwelling species with large dispersal distances, the existing forest patches and potential forest patches with "medium", "low" and "very low" levels should be protected and restored according to local conditions. This research method can accurately identify important forest patches and thus provide a reference for regional forest conservation and restoration planning.