摘要
以临沧市为研究区,基于生态系统服务评价结果确定的生态源地,以最小累积阻力模型构建临沧市生态安全格局体系。首先通过生态系统服务重要性和生态敏感性评价,将临沧市极重要和极敏感区域作为MCR生态安全格局构建的源地,综合考虑距离居民点、道路、水系的距离,土地利用,植被覆盖,地形因素等因子来构建生态源地扩张的阻力面,通过层次分析法AHP方法确定各阻力面权重,计算临沧市生态源地扩张综合阻力面。基于自然断裂法对生态源地空间阻力运动的综合最小累积(费用)阻力面进行空间聚类,划分出临沧市3种安全水平下的生态用地。低安全水平的生态用地面积为2014.25km^(2),占区域总面积的8.57%。中安全水平的生态用地面积为7610.41km^(2),占区域总面积的32.22%。高安全水平的生态用地面积为13985.49km^(2),占区域总面积的59.21%。通过临沧市生态系统服务评估、生态源地识别、MCR综合阻力面构建、生态廊道及生态源地识别,最终构建出临沧市的三屏一带的生态安全格局。三屏为南滚河自然保护区天然屏障,主要位于沧源县和耿马县境内,主要为临沧市生物多样性保护提供屏障,位于中部永德大雪山生态屏障区和位于西部的镇康边境生态保护屏障区。一带为澜沧江水源涵养保护带,从北至南沿澜沧江分布,主要为澜沧江水域涵养区。
This paper took Lincang City as the research area,and constructed the ecological security pattern system of Lincang City with the minimum cumulative resistance model based on the ecological source determined by the results of ecosystem service evaluation.Firstly,through the evaluation of the importance of ecosystem services and ecological sensitivity,Lincang city's extremely important and sensitive areas were taken as the source of MCR ecological security pattern construction,and the resistance surface of ecological source expansion was constructed by considering the distance from residential areas,roads and river systems,land use,vegetation cover,topographic factors and so on.The weight of each resistance surface was determined by analytic hierarchy process(AHP),and the comprehensive resistance surface of ecological source expansion in Lincang City was calculated.Based on the natural fracture method,the comprehensive minimum cumulative(cost)resistance surface of spatial resistance movement of ecological source was clustered and the ecological land under three safety levels in Lincang City was divided.The area of ecological land with low security level is 214.25km^(2),accounting for 8.57%of the total area of the region.The ecological land area at the middle safety level is 7610.41km^(2),accounting for 32.22%of the total area of the region.The area of ecological land with high security level is 13985.49km^(2),accounting for 59.21%of the total area of the region.Through ecosystem service assessment,identification of ecological sources,construction of MCR comprehensive resistance surface,identification of ecological corridors and ecological sources,the ecological security pattern of three barriers and one belt area in Lincang City was finally constructed.Three barriersare the natural barrier of Nangong River Nature Reserve as barrier for biodiversity protection in Lincang City,which isthe central YongdeDaxueshan Ecological Barrier Area and the western Zhenkang Border Ecological Protection Barrier Area in Cangyuan Co
作者
刘芳
张星梓
任静
刘岳雄
王万宾
LIU Fang;ZHANG Xing-zi;REN Jing;LIU Yue-xiong;WANG Wan-bin(Yunnan Research Academy of Eco-environmental Sciences,Kunming Yunnan 650034,China)
出处
《环境科学导刊》
2021年第4期78-83,共6页
Environmental Science Survey
