Research on the delineation and optimization of ecological protection redline based on the perspective of ecological security pattern in typical black soil areas of Northeast China
The typical black soil areas of Northeast China is facing problems such as degradation of ecosystem service functions,fragmented landscape patterns and conflicts between agriculture and ecological space.The scientific formulation of guiding framework for the delineation and optimization of ecological protection redline in black soil areas is of great significance in ensuring food security and ecological safety.This study clarified the meaning of ecological protection redline based on the perspective of ecological security pattern,and proposed the idea of systemic ecological protection redline delineation based on the importance of ecological protection,coordination of agriculture and ecological space,and coordination of natural and social system,and identified ecological protection redline optimization areas by considering the fragmentation and connectivity of ecosystem.The results show that:(1)On the premise of guaranteeing that no high-quality cropland was allocated(the threshold value was 10％),69646.00 km2 of the preliminary delineation area of the ecological protection redline were determined by overlaying extremely important areas for ecosystem services,extremely sensitive areas for ecological environment,and areas with mismatch between supply and demand of ecosystem services,and extracting 34760.16 km2 of ecological source land;(2)A total of 10980.90 km2 of ecological corridors and 77 ecological nodes were identified based on the ecological source and construction of a comprehensive ecological resistance surface,and their buffer zones and ecological protection areas together constituted an ecological protection redline area of 76234.54 km2;(3)Based on the optimization thresholds of fragmentation(0.20)and connectivity(80),approximately 25.48％of the ecological redline area was in urgent need of optimization.The results of the study improve the scientific and systematic nature of ecological protection redline delineation and optimization,and provide an important basis for the precise control of land space and strengthening ecosystem sustainability management in typical black soil areas of Northeast China,as well as important guidance for small and medium-scale regions with highly intensive land use and scarce ecological space.
ecological protection redlineecological security patterndelineation ideasoptimization thresholdthe typical black soil areas of Northeast China
万方数据
维普
