Construction and Optimization of Urban Ecological Networks in Beijing Based on Landscape Centrality
The identification of key ecological network elements is the focus of urban ecological network planning,which is of great significance for the hierarchical control of the municipal ecological network,guiding the layout of ecological land and promoting the sustainable development of the city.Taking Beijing as an example,the paper constructs an ecological network through the Least Cumulative Resistance model,evaluates and identifies key net-work elements by applying landscape centrality indicators,analyses the current ecological network problems based on the spatial distribution of network elements of different levels of significance,and puts forward the ecological network planning,control and protection strategies based on this.The results show that there are 56 ecological source patches in the study area,including 12 core source patches,which are mainly located in the north and cen-tral part of the study area,with a continuous distribution and large area;there are 18 stepping-stone patches,in-cluding 8 core stepping-stone patches,which are distributed in the central part of the study area in an aggregated form,and they play a role of linking the important ecological source patches in the north and south part of the study area;58 ecological corridors have been identified,of which 23 core corridors are mainly distributed in the central part of the study area,and they are located in the north part of the study area.There are 58 ecological cor-ridors,of which 23 are core,mainly distributed in the central part of the study area and located around the core source patches.The landscape centrality index can scientifically identify the key ecological network elements,which can guide the urban ecological network hierarchical control and ecological land layout planning,efficiently coordinate the relationship between urban development and ecological protection,and provide some reference for the same scale ecological network planning.
urban ecological networklandscape centralityminimum cumulative resistance modelgraded con-trolBeijing City
万方数据
维普
