基于MSPA的银川生态网络构建分析

Construction and Analysis of Yinchuan Ecological Network Based on MSPA

以银川市为例,采用MSPA(形态学空间格局分析)方法提取核心区斑块和桥接区斑块,计算了可能连通重要性指数识别出生态源地和生态廊道,从而构建了城市生态网络对城市生态格局进行了评估分析。结果表明:银川城市生态网络总体规模较大,以南北两大聚集区为主体源地,城区内两大主要廊道南北贯穿,四周斑块环绕连接,东部源地与主体源地沟通不够通畅;闭合环路较少,局部连通性较高,分布不均衡,网络结构复杂性较高,主干廊道功能过于突出,致使主干廊道受到干扰时生态网络总体易受较大影响,整体稳定性不高。此次所获研究成果,将为银川市调整优化生态结构布局、编制市政规划等工作提供科学依据。

Taking Yinchuan City as an example,the MSPA(morphological spatial pattern analysis)method was used to extract the core area patches and bridge area patches,and the possible connectivity importance index was calculated to identify the ecological source and ecological corridor,so as to construct the urban ecological network to evaluate and analyze the urban ecological pattern.The analysis results show that the overall scale of Yinchuan's urban ecological network is relatively large,with the two major gathering areas in the north and south as the main source.The two main corridors in the urban area run through the north and south,and the surrounding patches are connected.The eastern source and the main source are not well communicated;there are few closed loops,high local connectivity,uneven distribution and high network structure complexity.The function of the main corridor is too prominent.When the main corridor is disturbed,the overall stability of the ecological network is not high.The research results will provide a scientific basis for the adjustment and optimization of ecological structure layout and the preparation of municipal planning in Yinchuan.