The Stability Analysis Of Ecological Space Network On Robust Model

The rapid social and economic development in China has led to frequent natural disasters,aggravated environmental pollution,and disorderly expansion of construction.As a result,biological migration corridors have been blocked,species habitats have been accelerated and disappeared,biodiversity has decreased,and ecosystem stability has been affected.It is conducive to regional sustainable development.The party's 18 th National Congress granted the richer connotation of the construction of "ecological civilization" in China,the new concept of ecological civilization and the delineation of the ecological protection red line all put forward the requirements of systematic protection for ecology.The ecological space network connects ecological elements such as ecological patches and ecological nodes into an organic whole through ecological corridors.The ecological space network connects ecological elements such as ecological patches and ecological nodes into an organic whole through ecological corridors,and maintains regional biodiversity from the system,thus ensuring regional ecological security.Taking the Chaling County of Zhuzhou City as the research object,based on multidisciplinary theories of geography,landscape ecology and systems science,combining multiple methods such as landscape index,arcgis technology and robust model,focusing on the construction of ecological space network and evaluation of stability,grasping the key factors affecting the stability of the ecological space network,combining the ecological protection red line delimitation data,then propose a differentiated management strategy for regional ecological protection.Provide an effective way for systematic ecological protection,provide some theoretical guidance for the follow-up management of ecological protection red line,and provide case studies for the stability of county-level ecological space network.This study will provide an effective approach for systematic ecological protection,provide some theoretical guidance for the follow-up management of ecological protection red line,and provide case studies for the study of the stability of ecological spatial networks in similar counties.This study is based on the database of land use planning,forest land conservation and utilization planning,and ecological protection red line demarcation in Chaling County,and takes the stability of ecological space network as the starting point,based on geography,landscape ecology,systems science,graph theory,etc.Disciplinary theory,using ArcGIS,Fragstats,Pajek,R software and other software platforms,using landscape index analysis method,Arcgis spatial superposition analysis method,robust model and other methods to build Chaling ecological space network,and based on this,the stability of the ecological space network is evaluated by studying the dynamic changes of robustness indicators under different damage scenarios.The results show that:(1)The node with high importance is the key to maintaining the stability of the eco-space network;(2)The number of nodes determines the complexity of the network,and affects the stability of the eco-space network to a great extent——When the proportion of the 93 nodes in the network is within 26%,the stability of the eco-space network is high;when the proportion is between 64% and 92%,the ecological space network is in an extremely unstable state;when the proportion exceeds 92%,the ecological space network will be paralysed.Based on the results of comprehensive importance evaluation of nodes and network stability evaluation,and combined Chaling County ecological protection red line demarcation plan,three kinds of key protected area screening strategies,including individual protection strategies,general protection strategies,and extensive protection strategies,were formulated.According to the screening strategy,three kinds of differentiated management strategies were forbidden for development,limited development,and guided development.