Optimization of county ecological protection red line based on ecological security pattern:A case study of Jintan district,Changzhou city
In response to the challenges posed by boundary irregularity and coordination difficulty in internal land contradictions within the ecological protection red line during delineation,we propose a research framework encompassing"ecological security pattern construction-ecological protection red line optimization-optimization effect verification".Taking Jintan district in Changzhou city as a case study,this research utilizes methods such as Morphological Spatial Pattern Analysis(MSPA),In VEST model,Minimum Cumulative Resistance model(MCR),and Gravity model(GM)to establish the regional ecological security pattern.Then,the ecological source area and ecological corridor buffer zone are employed to optimize the original national ecological protection red line and the original provincial ecological space control area.Finally,the optimization effects of ecological protection red line and ecological space control area are quantitatively assessed in terms of landscape connectivity and spatial coordination.The results show that:(1)The core region of MSPA in Jintan covers an area of 10833.64 hectares,which is relatively consistent with the spatial distribution of high and moderately high comprehensive quality of ecosystem services.(2)The final identification of ecological source areas includes 9 sites,with a total area of 9085.48 hectares,accounting for approximately 9.31％of the entire region,which encompass six forest-type and three lake-reservoir-type ecological source areas and are predominantly situated within Maoshan Forest Park,Qianzidang Wetland,and Changdang Lake region.(3)We have extracted a total of 41 ecological corridors with a combined length of 284.71 km,including 16 important ecological corridors and 25 general ecological corridors,which are distributed densely in the Maoshan Scenic Area and its surrounding areas.(4)After optimization,the ecological protection red line expanded by 1700.57 hectares,with the average PC index of potential connectivity increasing from 22.10 to 25.06 and the average IIC index of overall connectivity rising from 21.13 to 25.05.Additionally,the ecological sapce control area increased by 90.59 hectares,while the conflict ratios with cultivated land and built-up land decreased by 0.95％and 0.57％,respectively.The research findings demonstrate that the approach satisfies the control requirements of"no reduction in function,no reduction in area,and no change in nature",which can serve as an effective means to optimize ecological protection red lines,offering valuable references for the improvement of delineation scheme.
regional ecological security patternMorphological Spatial Pattern Analysis(MSPA)InVEST modelecological protection red line optimizationJintan
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