Ecological system vulnerability assessment and temporal-spatial evolution analysis of Huangshan city based on VSD model
摘要
科学评估生态系统脆弱性是实现区域生态保护和推动高质量发展的重要依据.以黄山市3区4县为研究对象,基于VSD模型从暴露度、敏感性、适应性三方面构建指标体系,综合评价2014-2023年区域生态脆弱性,并结合ArcGIS与障碍度模型分析其时空演变特征及影响因素.结果表明:(1)2014-2023年黄山市生态系统脆弱性呈现先升后降的趋势,整体处于中度脆弱水平,各因素影响程度排序为暴露度＞敏感性＞适应性;(2)时间上,轻度脆弱区面积增加40.3％,中重度脆弱区面积缩减,其中重度脆弱区在2023年清零.但屯溪区受快速城市化影响持续处于极度脆弱状态,是生态治理重点区域;(3)在空间维度上,生态脆弱性呈现西部低、东部高的格局(4)障碍因子分析显示,暴露度障碍度上升,敏感性障碍度波动变化,适应性障碍度下降.在此基础上,提出加强生态监测与评估、实施差异化保护策略和完善生态补偿机制等改善措施.
Scientific assessment of ecosystem vulnerability is essential for regional ecological conservation and high-quality devel-opment.Taking Huangshan City's three districts and four counties as a case study,this research developed an evaluation framework based on the VSD model through three dimensions-exposure,sensitivity,and adaptability.It comprehensively assessed regional ecologi-cal vulnerability from 2014 to 2023 and analyzed its spatiotemporal evolution and influencing factors using ArcGIS and the obstacle de-gree model.The results showed that:(1)During 2014-2023,Huangshan's ecosystem vulnerability exhibited a"first increase then de-crease"trend,remaining moderately vulnerable overall;factors affecting the vulnerability index(in descending order of influence)were exposure,sensitivity and adaptability.(2)Temporally,slightly vulnerable areas increased by 40.3％,while moderately/severely vulner-able areas decreased(severe vulnerability eliminated in 2023);however,Tunxi District remained extremely vulnerable due to rapid ur-banization,a key ecological governance area.(3)Spatially,the vulnerability presented a"west-low,east-high"pattern.(4)During 2014-2023,exposure's obstacle degree rose,sensitivity's fluctuated,and adaptability's fell.Based on these findings,measures such as enhancing ecological monitoring and assessment,implementing differentiated protection strategies,and improving ecological compensa-tion mechanisms were proposed.
