Study On The Construction Of Ecological Security Pattern In Lue Yang County

Due to the expansion of the scale and intensity of human use of natural resources,environmental problems such as global climate change,degradation of ecological functions,serious environmental damage,resource depletion,and loss of biodiversity functions that threaten ecological security have emerged.Ensuring that ecological security is in a healthy and not threatened state has become the key to solving ecological environmental problems and has attracted extensive attention from government departments and academic fields.As a key technical means to solve ecological problems,the construction of ecological security pattern is of great significance for protecting regional ecological security and improving the level of ecological sustainable development.In recent years,human activities such as hydropower and mineral resource development in Lueyang County have caused serious ecological damage,the quality of forests and water conservation functions have been reduced,biodiversity protection has been threatened,and the contradiction between the rapid social and economic development and the fragile ecological environment has intensified..As a national key ecological function zone,Lueyang County’s ecological safety is particularly important,and there is an urgent need to strengthen the construction of ecological environment protection.Therefore,based on the assessment of habitat quality and ecological sensitivity in Lueyang County,this paper selects patches with the highest habitat quality level and relatively large patch area in the ecological protection red line as the ecological source,and comprehensive consideration of elevation,slope,and land use Type,habitat quality index and ecological sensitivity are the resistance factors for ecological expansion,and the least cumulative resistance model is used to construct an ecological security pattern with ecological sources,ecological corridors and ecological strategic nodes as components.The research conclusions are as follows:(1)The overall level of habitat quality in Lueyang County is relatively high,with high-grade and higher-grade habitats accounting for the largest proportion,followed by low-grade and lower-grade areas,and medium-grade habitats with the least quality;The degree of degradation is predominant,with lightly degraded areas accounting for more than half of the county’s total area,and areas with highhabitat quality have low levels of habitat degradation.(2)The ecological sensitivity of Lueyang County is mainly moderately sensitive and highly sensitive,which account for more than 50%of the total.Among them,the area of highly sensitive areas is mainly concentrated in the northeast,south and northwest of Lueyang County,which is roughly consistent with the spatial distribution of forestry land;moderately sensitive areas are distributed along the edges of insensitive and lightly sensitive areas;lightly sensitive and insensitive areas The sensitive area is relatively small and located in the central area of Lueyang County.(3)The ecological security pattern of Lueyang County consists of four parts:ecological source,ecological security zone,ecological corridor and ecological strategic node.Among them,the area of ecological source area is 48374.73hm~2;the ecological safety zone is divided into three levels:low,medium,and high.Low-level ecological safety zone accounts for the largest proportion,medium-level ecological safety zone takes the second place,and high-level ecological safety zone is the least;extract potential ecology There are 23 corridors,and 8 important ecological corridors are extracted after optimization;25 points are identified as the ecological strategic nodes of Lueyang County.(4)Propose optimized protection measures for the ecological safety protection of Lueyan County based on the ecological security pattern,and provide scientific reference for ensuring Lueyang’s ecological safety and sustainable development.