Abstract: Ecological protection and restoration for territorial space is a major pathway to implement ecological civilization construction. Accurately identifying priority areas of territorial space for ecological restoration is the prerequisite for the orderly promotion of ecological protection and restoration. Taking Zunhua City, Hebei Province as the research area, ecological sources were determined through connectivity analysis, habitat quality evaluation, and ecosystem service value calculation. The circuit theory was applied to determine corridors, construct ecological security pattern, and identify ecological pinch points, barrier points, break points, and other priority areas for ecological protection and restoration of territorial space. The results showed that the areas of ecological sources were 113.16 km², accounting for 7.5% of the total. Most of the ecological sources were forests and grasslands, which were mainly distributed in the south of the city. There were 56 ecological corridors with a total area of 208.85 km². Weidentified 16 pinch points, 26 barrier points, and 76 break points. There was much to do for improving regional habitat connectivity. Based on the constructed ecological security pattern, Zunhua City was divided into ecological conservation zone, ecological upgrading zone, and ecological enhancement areas. We proposed ecological protection and restoration strategies for different zones, to provide scientific references for overall protection and restoration of ecosystems.

Key words: ecological security pattern, circuit theory, ecological pinch point, ecological barrier point, ecological break point.