[Territorial Ecological Restoration Zoning and Diagnosis of the Upper Reaches of the Yangtze River Shoreline in the Chongqing Section].

Exploring the ecological restoration zoning and diagnosis of the territorial space of the upper reaches of the Yangtze River shoreline in the Chongqing section could provide a scientific basis for regional land space ecological restoration. This study used the "sensitivity-resilience-pressure" （SRP） model to evaluate the ecological vulnerability of the upper reaches of the Yangtze River shoreline in the Chongqing section from 2010 to 2023 and used various methods to construct the ecological security pattern， including morphological spatial pattern analysis （MSPA）， minimum cumulative resistance （MCR） model， circuit theory， and others. Based on the ecological vulnerability assessment and ecological security pattern construction， this study carried out the territorial ecological restoration zoning and proposed diagnostic strategies. ① From 2010 to 2023， the ecological vulnerability index showed an overall upward trend， with moderate and above ecological vulnerable areas accounting for 95.86%. Highly and severely vulnerable areas were primarily concentrated in the main urban area of Chongqing and along the shorelines of the central urban areas of districts and counties. ② The study identified 17 ecological sources totaling 155.10 km2 in area， 25 ecological corridors with a total length of 438.46 km， 12 ecological pinch points concentrated in the shoreline of Chongqing's main urban area， and 39 ecological barriers predominantly located in the shoreline from Yunyang to Fengjie section. ③ There were four categories of ecological restoration zoning， including key protection areas， independent protection areas， key restoration areas， and ecological remediation areas. This paper proposed diagnostic strategies for different zones to provide references for the protection and restoration of ecosystems in the upper reaches of the Yangtze River.