基于模块度的生态网络结构评价方法研究

RESEARCH ON THE EVALUATION METHOD OF ECOLOGICAL NETWORK STRUCTURE BASED ON THE MODULARITY DEGREE

当前,我国正在进行以生态文明为主题的国土空间规划,国土生态空间的生态网络结构优化方法仅从斑块及廊道的功能重要性进行评价,未考虑生态斑块在网络中的结构重要性。为解决网络中生态斑块的结构重要性评价的缺失问题,文中从复杂网络结构的角度分析,提出基于模块度的生态网络结构重要性评价方法,并以哈尔滨市为例进行应用验证。研究结果表明,根据模块度可以用于生态网络结构优化,模块度高的网络结构更稳定;对关键战略点的识别可以维持生态网络结构的稳定性,为国土空间规划中生态空间与城镇空间和农业空间的博弈提供依据。

Currently,China is carrying out territorial spatial planning with the theme of ecological civilization.The traditional ecological network structure optimization method of land ecological space only evaluates the functional importance of patches and corridors and does not consider the structural significance of ecological patches in the network.To solve the problem of lack of structural importance evaluation of ecological patches in the network,this paper proposes a modularity-based ecological network structure importance evaluation method from the perspective of complex network structure analysis.The application of the method is verified within Harbin city.The results show that modularity can be used for ecological network structure optimization,and the network structure with high modularity is more stable than that of tradition method.Identifying key strategic points maintains the stability of the ecological network structure and provides a basis for the game between ecological space,urban space,and agricultural space in territorial spatial planning.