Identification of Ecological Security Patterns for the Qiandongnan Ecotourism Area in Southwest China Using InVEST and Circuit Theory

Abstract

The establishment of ecological security patterns (ESPs) represents a significant paradigm shift in the approach to sustainable development. ESPs aim to reconcile the typically conflicting interests of ecological conservation and economic growth by guaranteeing the sustainability of critical ecosystem services and preserving the ecological integrity of the region while promoting socio-economic development. The primary objective of ESPs is to achieve a balanced and harmonious relationship between human society and the natural environment. The Qiandongnan Ecotourism Area (QEA) located in Southwest China is renowned for its high biodiversity; however, the ecological environment in the region is highly fragile. In light of this, there is an urgent need to establish ESPs for QEA that can promote ecological protection and sustainable economic development. In this study, we used land-use and land-cover change data and human disturbance factors to identify the ESPs of the Qiandongnan Ecotourism Area (QEA), employing the InVEST model and Circuit Theory. Our results revealed that (1) the ecological quality of the study area is relatively high, with high-quality habitat areas covering 19,554.76 km2, which account for approximately 64.57% of the study area and the overall ecological environment is in a healthy condition; (2) the total area of ecological sources covers approximately 17,616.27 km2, accounting for approximately 58.17% of the study area, primarily distributed in Liping, Rongjiang, and Congjiang, which respectively account for 16.28%, 12.44%, and 11.86% of the total ecological source area; (3) the ESPs are composed of 13 key ecological nodes, 17 ecological corridors (with a length of approximately 1474.47 km), and 21 ecological source clusters. The ecological corridors are distributed in a ring shape, connecting various ecological nodes and sources along mountains, forests, rivers, and valleys. These findings provide a theoretical foundation for the protection of the ecological system’s integrity and the development of social and economic activities in the QEA.