祁连山国家公园交通线路路域生态质量差异性研究OACHSSCD

Quantifying disturbances from transportation infrastructure in ecologically sensitive areas remains necessary.This study targets the G227 highway and the Lanzhou-Xinjiang high-speed railway(Lan-Xin HSR)within Qilian Mountain National Park.An autoencoder-based remote sensing ecological index(AE-RSEI)was constructed by integrating multi-source imagery from 2015-2024,and ecological quality dynamics were compared within 2,000m buffers along both corridors.GeoDetector was employed to identify drivers of inter-corridor differences.Results indicate a clear distance-decay pattern of disturbance,with 1,250m identified as a significant spatial threshold.Ecological responses differ between the two corridor types:along the G227 highway,ecological quality is improved overall but AE-RSEI values remain lower than those along the Lan-Xin HSR.The highway exhibits a broader and more persistent disturbance footprint,whereas the ecological impacts from HSR are spatially concentrated and less variable.These findings reveal contrasted impact intensity and evolutionary pathways between highways and railways in sensitive landscapes,and provide an evidence base for ecological assessment and regulation of similar projects.Priority should be given to closed,access-controlled rail corridors when planning infrastructure in such areas to reduce ecological disturbance.