北京师范大学学报（自然科学版）2025，Vol.61Issue(6)：887-896,10.DOI:10.12202/j.0476-0301.2025066
输变电工程对区域生物多样性生态风险的多尺度评价
Multi-scale assessment of ecological risks to regional biodiversity from power transmission projects
摘要
Abstract
Power transmission and transformation projects pose multi-dimensional threats to biodiversity through habitat destruction,electromagnetic interference,and landscape fragmentation.This study constructs a multi-scale ecological risk assessment framework for regional biodiversity by integrating indicators across genetic,species,ecosystem,and landscape levels.A weighted risk superposition model is introduced to quantify nonlinear ecological feedback mechanisms.Using the Baoji-Hanzhong 750 kV transmission project as a case study,the results reveal a clear spatial differentiation in ecological risk intensity,with higher risk levels concentrated in the northern Qinling region.In this area,the landscape fragmentation index exceeds 0.7,while the largest patch index declines to 0.28,significantly below the threshold required to sustain stable wildlife migration corridors.Forest carbon storage capacity is weakened,evidenced by a 19%reduction in litter decomposition rates and disruptions to carbon-nitrogen cycling.An edge density of 186 meters per hectare and a Shannon diversity index of 2.8 facilitte the proliferation of edge species and decline of core species.Simultaneously,a reduction in effective population size signals the crossing of genetic diversity collapse thresholds.Based on these findings,this study proposes a zoned risk management strategy based on a"prevention-mitigation-compensation"framework.This findings offer replicable technical pathways and inform integrating planning for green energy infrastructure and biodiversity conservation.关键词
输变电工程/生态风险评价/生物多样性/景观破碎化/多尺度耦合Key words
power transmission project/ecological risk assessment/biodiversity/landscape fragmentation/multi-scale coupling分类
资源环境引用本文复制引用
李熙,江世雄,王重卿,王文燕,周烜如,徐多,颜宁聿,吴梦蓉,刘耕源..输变电工程对区域生物多样性生态风险的多尺度评价[J].北京师范大学学报（自然科学版）,2025,61(6):887-896,10.基金项目
国家电网公司总部科技资助项目(52130423001W) （52130423001W）
