CONSTRUCTION AND OPTIMIZATION OF ECOLOGICAL NETWORK IN CHENGDU-CHONGQING URBAN AGGLOMERATION, CHINA

Establishing ecological networks is an important strategy for maintaining ecosystem integrity and promoting the resilience of natural systems.In this study, the China's Chengdu-Chongqing urban agglomeration was used as the research region, and The Morphological Spatial Pattern Analysis (MSPA) Model and landscape index method were used to screen out important ecological source for ecological corridor construction.The Minimum Cumulative Resistance (MCR) Model was used to construct an integrated resistance surface, and then the coastal path tool in Arc GIS was used to create ecological corridors.Finally, an optimized ecological network of the China's Chengdu-Chongqing urban agglomeration was formed.The results of the study can provide a reference for developing similar regions.The research findings indicate that, using the MSPA method, 30 patches covering a total area of 75,206.90km 2 .Were identified among the ecological sources, accounting for 37.86% of the total area of the China's Chengdu-Chongqing urban agglomeration.The constructed comprehensive resistance surface exhibits a spatial characteristic with higher values at the periphery and lower values at the core.Finally, 80 ecological corridors, totaling 7547.85 km in length, were identified using the gravity model.The China's Chengdu-Chongqing urban agglomeration urgently needs to increase high-quality forests as the ecological cornerstone in the central area, and form a hot springs-type layout of peripheral ecological barriers around the core area of the urban agglomeration, so as to build an ecological security pattern that can not only guarantee the ecological balance of the urban agglomeration, but also effectively alleviate the pressure of urban development.