Abstract:To improve the regional ecosystem service function and form a high-quality development land space grid, this study takes the Southern Sichuan economic zone as the research scope, uses the ecosystem service assessment results to extract the ecological source, and uses the possible connectivity index（PC） to evaluate the importance of the source. Then, the minimum cumulative resistance (MCR) model was used to indentify the potential ecological networks and ecological nodes and the overall pattern of the ecological network in the South Sichuan Economic Zone was obtained. The results show that：(1) The ecosystem service function of the Southern Sichuan economic zone has obvious spatial heterogeneity and 6133.50 km2 of extremely important ecological areas were identified. (2) Combined with the importance of ecological function and landscape structure, a total of 27 ecological sources were selected, accounting for 12.97% of the study area.(3) The 57 potential ecological corridors, 21 ecological points and 24 ecological fragile points were identified. Finally, this paper puts forward optimization suggestions for key elements of the ecological network and builds an ecological network pattern of “One core five centers, and one belt multi corridors”.
