[Analysis of Ecological Network Evolution in Taihang Mountains Based on MSPA-InVEST Model]

Building an ecological network is an effective way to alleviate the contradiction between ecological protection and economic development， and utilizing the importance of ecosystem service functions and morphological spatial pattern analysis to identify the evolution of the ecological network in the Taihang Mountains scientifically has great significance for protecting regional ecological environment security. Taking the Taihang Mountains as the research area， based on time-series data from 2000， 2010， and 2020， the levels of four ecosystem service functions， namely， water conservation， carbon storage， soil conservation， and habitat quality， were calculated. Morphological spatial pattern analysis was coupled to identify the ecological source areas of the Taihang Mountains. Using circuit theory， ecological corridors were extracted to construct the ecological network and analyze its spatiotemporal evolution characteristics. The study produced several important results： ① From 2000 to 2020， the ecological source area of the Taihang Mountains， with dense distribution in the north and south and scattered and sparse distribution in the middle， increased from 13 168.76 km² to 15 007.17 km². ② The number of ecological corridors increased from 101 to 105， among which the number of important ecological corridors increased from 84 to 86， and the number of potential ecological corridors increased from 16 to 19. The corridors showed a spatial distribution pattern of north-south clustering and sparse surroundings. ③ Ecological pinch points and ecological barrier restoration areas were mainly distributed around ecological corridors， and exhibited frequent changes. The identified area of ecological pinch points exceeds 20 000 km² and showed a significant decline followed by a slight rebound trend. The identified area of ecological barrier points exceeds 3 000 km² and showed a V-shaped trend of stable decline followed by rebound.