[Urumqi Metropolis Circle "Production-Living-Ecological Spaces" Carbon Metabolism Analysis Based on Ecological Network Utility].

Greenhouse gas emissions resulting from land use changes have become a significant factor affecting carbon emissions. With the global ecological environment issues becoming more prominent， attention to territorial spatial changes and carbon has also increased. Studying the carbon metabolism of "production-living-ecological spaces" can provide a basis for optimizing regional territorial space and promoting low-carbon development. Taking the Urumqi metropolitan area as an example， a classification system for "production-living-ecological spaces" and a vertical carbon metabolism model were constructed. Using the ecological network analysis model， the characteristics of the carbon metabolism evolution of "production-living-ecological spaces" from 2000 to 2020 were studied， the ecological relationships of carbon metabolism were evaluated， and their temporal and spatial changes were analyzed. The results showed： ① From 2000 to 2020， all space types underwent varying degrees of transfer， with forestry， grassland ecological spaces， and urban production and living spaces being particularly prominent. ② The net carbon flux and net carbon flow of the metropolitan area were both less than zero， indicating that the changes in "production-living-ecological spaces" had a negative impact on carbon metabolism， affecting the regional carbon balance. ③ Competitive relationships dominated from 2000 to 2015， while restrictive and exploitative relationships were predominant from 2015 to 2020. Ecological relationships primarily occurred in the west， northwest， central， and eastern parts of the study area. ④ Agricultural and ecological spaces were dominated by restrictive and exploitative relationships， agricultural and urban spaces by competition， and the dominant relationship between ecological and urban spaces shifted from competition to mutualism after 2015； the overall ecological efficiency index was less than 1. The research findings can provide a theoretical basis for the optimization of metropolitan "production-living-ecological spaces" and the implementation of carbon emission reduction， promoting high-quality， low-carbon regional development.