Identification of key areas of ecological protection based on the pattern of ecological security:a case of Jiutai District in Changchun City

In the context of ecological security, building an ecological security pattern is one of the important foundations for the construction of ecological civilization.This paper selects Jiutai District in Changchun City as the research object, and determines the ecological source, ecological corridor and ecological pinch based on the importance evaluation of ecological service function, minimum cumulative resistance model and circuit theory, so as to construct the ecological pattern of Jiutai District.The results show that the ecological source area of Jiutai district is 829.93 hm², accounting for 24.62% of the total area of the study area.The land use types are forest land and water area.There are 34 ecological corridors in Jiutai District, which are distributed among the ecological sources, mainly in the middle and northeast of Jiutai District; there are 8 ecological pinch points, which are scattered in the south, southwest and northeast of Jiutai District, so as to maintain the connectivity between the ecological sources.The ecological sources, ecological corridors and ecological pinch points in Jiutai District are classified, protected and restored.The ecology of Jiutai District is mainly protected source, implement strict supervision to make it better play its ecological function.The ecological corridor and ecological pinch are included in the ecological control area of land spatial planning, and development and construction activities are carried out appropriately on the premise of no damage to the ecological environment.The results are of great significance for Jiutai District to put forward ecological design planning, urban spatial development preview and land use spatial layout optimization strategy.