Robustness simulation and stability analysis of ecological network in Wuhan metropolitan area
Ecological networks show different robustness under different levels of damage or interference intensity,which is bound to cause the regional ecosystem risk.Based on the construction and identification of the ecological network of the Wuhan metropolitan area,the importance evaluation system of nodes and corridors was established,and the robust model was used to simulate the robustness changes under random interference scenarios to evaluate the stability of the ecological network.The results showed that:(1)Based on the complex network theory a topological network consisted by 117 nodes and 189 connecting lines was generated according to the ecological network of the Wuhan metropolitan area.The nodes with higher importance level accounted for 23.93%,which were mainly distributed in the central and northern part of the study area.The nodes with lower importance accounted for 51.28%of the total number of nodes,mainly distributed in the northwest and southeast of the study area.(2)The gravity model was used to determine the importance of ecological corridors.17 important corridors were obtained,and 28 were general corridors.Important corridor had a great impact on the connectivity and stability of the ecological network.(3)The number and importance of nodes had a significant impact on the stability of the network.When the node failure rate was less than 50%,the ecological network stability change was small,and the overall stability was relatively high;when the node failure rate was between 50%-85%,the ecological network was extremely unstable;when the node failure rate reached 85%,the ecological network began to paralyze.(4)Based on the importance of ecological nodes and corridors and simulated results,differentiated management strategies for ecological node protection and corridor construction were proposed.
ecological networkstabilityrobustnessWuhan metropolitan area
国家科技期刊平台
NSTL
万方数据
