| Western Jilin Province is in the interlocking zone of agriculture and animal husbandry,which is also a typical ecologically fragile area and a national key ecological protection area,and an important commodity food base in northeast China.In recent decades,with the increase of population in the region,the impact of human activities on the ecological environment has been expanding,and the fragile wetland system in western Jilin Province has been damaged.The ecological environment has been affected by overgrazing and indiscriminate farmland reclamation.Therefore,it is important to analyze the spatial and temporal evolution characteristics of the“Production-Living-Ecological” Space in the study area,to objectively and quantitatively assess the functional intensity of the “production-living-ecological” and the distribution characteristics of land use conflicts,so as to provide a basis for regional development planning in a scientific and reasonable manner,and to promote the harmony of the “production-living-ecological” function in the region.This will provide a scientific and reasonable basis for regional development planning and promote the harmonious and stable development of the “production-living-ecological” functions.Based on the remote sensing monitoring data of land use status in 1990,2000,2010 and 2020,this paper investigates the spatial and temporal changes of“Production-Living-Ecological” Space and landscape pattern changes in western Jilin Province from 1990 to 2020 with the help of various methods.The evaluation model of“Production-Living-Ecological” functions was constructed by MCE(multi-criteria evaluation method),and an intensity diagnosis model was further constructed by the evaluation results to identify land use function conflicts.Finally,the spatial distribution map and spatial relationship map of land use function conflicts,land use function conflict potential in the study area were derived by the cold hot spot analysis and neighborhood analysis.The spatial distribution map and spatial relationship map of land use function conflicts and land use function conflict potential in the study area were derived.The main conclusions are as follows:(1)From 1990 to 2020,the area of production space in western Jilin Province increased by 437,600 hectares,the area of ecological space decreased by 456,800 hectares,and the area of living space increased by 19,200 hectares,of which agricultural production land in production space increased by 430,400 hectares and grassland in ecological space decreased by 410,100 hectares.From 1990 to 2000,the area of production space increased by 38,000 hectares,while the area of ecological space decreased by 41,600 hectares.The transformation of the spatial structure of "Production-Living-Ecological" Space was mainly based on the mutual transformation between ecological space and production space,with small differences in spatial distribution.From 2000 to 2010,the area of production space in western Jilin Province increased by 335,400 hectares.The area of ecological space decreased by 342,200 hectares,and the structural transformation was dominated by the transformation from ecological space to production space,with production space gradually expanding from the north and east to the center.From 2010 to 2020,the production space area increased by a total of 64,200 hectares,and the ecological space area decreased by a total of73,000 hectares,with the structural transformation dominated by the inter-conversion of ecological space and production space.There was a trend of expansion of ecological space from the center to the southwest.(2)The spatial stability and land homogeneity of "Production-Living-Ecological" Space in western Jilin Province first increased and then decreased from 1990 to 2020,with an overall decreasing trend.The dominance of agricultural land first decreased and then increased,with an overall increase in the control of "Production-LivingEcological" Space in the study area.From 1990 to 2000,the spatial stability and site homogeneity of "Production-Living-Ecological" Space increased,and the dominance of agricultural land over "Production-Living" Space decreased;from 2000 to 2010,the spatial stability and site homogeneity of "Production-Living-Ecological" Space decreased,and the dominance of agricultural land over "Production-Living" Space increased.From 2010 to 2020,the spatial stability and site homogeneity of "Production-Living-Ecological" Space continued to decrease,and the dominance of agricultural land further increased.(3)During the 30 years,the overall production and living space landscape pattern slightly increased,and the fragmentation of ecological space patches was obvious.1990-2000,the trend of fragmentation of each space patch weakened,the agglomeration increased,the shape tended to be regular,and the overall nature increased;2000-2010,the overall production space landscape pattern further increased,and The fragmentation of ecological space intensifies,the dominance of large ecological space patches decreases significantly,and the living space shows a smaller fragmentation trend;from2010 to 2020,the landscape pattern of production space tends to be fragmented,and the fragmentation of ecological space and living space is more drastic compared with the previous stage,but the dominance of large ecological space and large living space has increased.(4)The production,living and ecological functions in western Jilin Province were at low,high and medium intensity level respectively in 2020.The areas of strong,medium and weak production levels accounted for 9.43%,24.77% and 66.07%,respectively,and the units with strong levels were mainly concentrated in the southeast.The living function units formed two core clusters with Songyuan District and Baicheng District,and the areas of strong,medium and weak living levels accounted for 36.10%,45.12% and 18.78% respectively.The areas of strong,medium and weak ecological levels accounted for 25.18%,46.24% and 28.58%,respectively,and the units with strong levels were mainly concentrated in the north,western edge and east of central of the study area.(5)The proportions of the stable and controllable stage,basic controllable stage,basic out-of-control stage and serious out-of-control stage were 54.90%,24.99%,19.06% and 1.05%,respectively.Among these,the units at the basic out-of-control stage were mainly concentrated in the north,east and southeast of the study area.The units at the serious out-of-control stage were mainly concentrated in the central of east of the study area. |
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