[Constructing the Ecological Pattern of Funiu Mountain Based on a Multilevel Approach of "Ecological...

Constructing an ecological security pattern is a crucial measure for implementing regional ecological protection and construction. Taking the Funiu Mountain area as the study area and based on the theoretical framework of "ecological potential-resilience-connectivity，" this study integrates the InVEST model and circuit theory to construct a multi-level ecological security pattern. The results show that： ① Based on ecosystem service capabilities such as carbon sequestration， water yield， and soil conservation， an ecological potential index was comprehensively constructed. The study found that there were significant spatial differences in the ecological potential factor. The areas with strong ecological potential were mainly concentrated in the central zone， accounting for 54.32% of the study area. The resilience index system constructed based on net primary productivity （NPP）， organic matter content， and population density revealed significant spatial differences in the three key factors. The study area was dominated by moderate ecological resilience， and the core patches with high connectivity were mainly concentrated in the central part of the region. ② A total of 26 ecological sources were identified， with a total area of 4 925.64 km²， accounting for 8.8% of the Funiu Mountain Nature Reserve. Forty-seven ecological corridors， 116 ecological pinch points， and 59 ecological barrier points were identified. The study added seven ecological steppingstones. A network analysis was used to compare and found that the optimized ecological corridors totaled 63， an increase of 16 compared to that before optimization. Overall， the energy circulation level of the optimized ecological network and the node connectivity were significantly improved， and the spatial distribution of the corridors was more even. To better protect the ecological sources located in high-value areas of the ecological resistance surface， seven ecological source "buffer zones" were constructed with radii of 500 meters and 2 000 meters， respectively， to explore the impact of different buffer zone widths on the ecological network protection effect. ③ Under the ecological protection scenario， based on the "source-corridor-networked， habitat-connected" ecological network， a final ecological space security pattern of "one core， two belts， six zones， and multiple points" was formed.