Assessing ecosystem change and mitigating ecological risk in Qinghai-Tibet integrated transport corridor
该研究构建了一个宏观-微观评估框架，系统量化了青藏综合运输通道内道路网络对生态格局、生态系统服务、景观生态风险和土壤污染风险的影响，并提出了缓解策略。
The ecological impacts of transportation infrastructure have received increasing attention; however, research on the ecological impacts and potential risks caused by multiple roads in ecologically vulnerable areas remains insufficient. This study develops a macro-micro assessment framework synthesizing ecological patterns, ecosystem services, landscape ecological risk, and soil pollution risk to systematically quantify ecological changes and risk thresholds, and proposes mitigation strategies for Qinghai-Tibet Integrated Transport Corridor. Results indicate that since 2000, road networks have increasingly influenced ecological patterns and ecosystem services, with a transition from human-influenced to natural systems at 4-6 km from roads, while landscape fragmentation did not significantly exacerbate in the corridor. Highway and railway transportation brought heavy metal deposition such as Cd and Pb mainly in upper soil layer, while soil pollution risk confined primarily within 30 m from roads. It recommends delineating differentiated ecological redlines and establishing dual-layer pollution control zones. These findings provide scientific reference for ecological transportation construction in vulnerable areas.