Abstract: The construction of ecological security pattern at the county level is an important part of current territorial spatial planning, which is of great significance to the construction of regional ecological civilization. Based on the framework of “Extraction of ecological source-construction of comprehensive resistance surface-identification of ecological corridor”, we simulated ecological flow and animal migration in Qixia City of Shandong Province by using the circuit theory, and identify ecological “pinch points”, “barrier points” and ecological restoration zones, making the construction of ecological security pattern more visual, precise and hierarchical. The results showed that: (1) There are 11 ecological source areas and 20 ecological corridors in Qixia City, including 7 major ecological corridors and 13 potential ecological corridors. There are fewer ecological sources and more potential ecological corridors, indicating that the ecological quality of Qixia should be improved. (2) We identified 19 ecological “pinch points” and 16 ecological “obstacle points”, suggesting the spatial imbalance of Qixia’s ecological environment. (3) The area of the first, second, and third-level ecological improvement area in Qixia City was 318.65, 437.21, and 529.44 km², respectively. All the areas had different degrees of ecological problems. Therefore, it is urgent to improve the ecological environment near the “pinch points”, improve the patency of the ecological corridors, repair the “obstacle points” and “fault points” in different categories and according to local conditions, improve the landscape ecological connectivity among various sources, strengthen the ecological coordination and ecological environment integrity among towns, and promote the sustainable development of the region.

Key words: ecological restoration, circuit theory, ecological corridor, Qixia City