Dynamic Identification,functional Evolution And Zoning Control Of County Ecological Space

Eco-spatial identification is one of the effective methods to effectively maintain the ecological environment and slow down the degradation of ecological services.Realizing the identification of the leading functions of ecological space is undoubtedly of great significance for optimizing the new pattern of development and protection of land space and strengthening regional ecological protection in the context of the intensification of regional environmental problems caused by the rapid development of urbanization in the future.Taking Qionglai City as an example,this paper uses Arc GIS,IDRISI,geographic detectors and other software to evaluate the importance of regional ecosystem services and the sensitivity of ecological environment,so as to identify stable or small ecological spaces and explore ecological Spatial heterogeneity of system service functional importance and eco-environmental sensitivity.On this basis,the equivalent factor method and the functional value method are used to calculate the eight functions of ecological space and identify the dominant function,and analyze the evolution of the dominant function from three aspects:quantity,structure and space.According to the importance of ecosystem service functions and the original value of ecological environment sensitivity,the original value of comprehensive functions is superimposed,and the natural breakpoint method is used to divide Qionglai City into three levels of management and control areas.As a spatial differentiation factor,environmental sensitivity is the detection result of different ecological divisions and the evolution characteristics of dominant functions,and the ecological protection goals and countermeasures of different regions as well as targeted protection measures are clarified.research shows:(1)The total ecological space area of Qionglai City is 543.99km~2,accounting for 39.19%of the city’s total area.Mainly distributed in the west of the Xihe-Nanhe boundary,and a small amount in the southeast,mainly including Jiaguan Town,Daozuo Town,Tiantaishan Town,Huojing Town,Gaohe Town,Nanbaoshan Town,Shuikou Town and the east of Huilong Town.High demand area.It passes along the banks of important water systems such as Nanhe,Xihe,Xiaoxihe,and Baimojiang,or is distributed in mountainous areas with higher elevations and slopes in the western region.In addition,the importance of ecosystem service functions and the sensitivity of ecological environment have higher q values in the overall spatial distribution and local spatial distribution,indicating that their spatial heterogeneity in the overall spatial distribution and local spatial distribution of Qionglai is more obvious.the simple transformation of its q value satisfies the non-central F distribution,and the result is also very significant.(2)From 2010 to 2020,the area of the dominant functional types in Qionglai City generally showed a change rule of"four increases,one decrease,and two unchanged",that is,the area of primary product production functions,climate regulation functions,gas regulation functions and hydrological regulation functions increased.the area of biodiversity maintenance function decreased,and the environmental purification function and soil maintenance function basically remained unchanged.Among them,the biodiversity maintenance function is the most dominant function type in the study area.In the past 10years,the dominant function types in this region have changed rapidly,and the gas regulation function and climate regulation function have changed the fastest,with an annual change rate of 35.84%and 15.06%,respectively.From the perspective of spatial change,the functions of climate regulation,gas regulation,primary product production and biodiversity maintenance that have undergone relatively large changes.(3)The total area of the ecological protection red line area is 55.26km2,accounting for10.16%of the ecological space area,and it is classified as a first-level control area;the ecological function guarantee area has a total area of 470.37km2,accounting for 86.47%of the ecological space area,and is classified as a second-level control area;ecological protection area The total area of the restoration area is 18.37km2,accounting for 3.38%of the ecological space area,and is classified as a three-level control area.Through geographic detection in each region,the results show that the importance of ecosystem service functions has a stronger explanatory power for the distribution of ecological protection and restoration areas,and the sensitivity of ecological environment has a stronger explanatory power for the distribution of ecological protection red line areas.effects are nearly the same.In view of the fact that different regions are affected by the importance of ecosystem service functions or the explanatory power of ecological environment sensitivity,and the function that occupies the most dominant position in the ecological space identified in this paper is stable and unchanged or with a small range of change,biodiversity maintenance function,this paper proposes different targeted protection measures for different regions.