摘要
基于Landsat MSS/TM/ETM+(1974,1992,2000,2006年)4期遥感影像,应用GIS和RS技术提取了昆明市周边景观类型信息,并利用景观指数分析了其景观格局动态演化特征.结果表明:①1974～2006年间,由于城市化过程中人类活动的强烈干扰,景观格局已由1974年的以自然景观为主逐步变为2006年的以人文景观为主;新增建设用地主要来源于耕地,且对其它地类占用的强度逐年加大;②有林地、灌木林和耕地的优势度显著降低,向弱势景观转变;32a间景观破碎度加剧,连接性降低,2006年多样性指数增加到1.7754,均匀度指数增加到0.8538,景观格局向着多样化、均匀化方向发展,景观格局完整性变差;景观形状呈现先复杂后简单的变化,表明城市扩张由低级到高级;③32a间景观聚集度、连接性降低,多样性和均匀度水平一直增加,且一段时期内将维持此趋势不变,生态安全处于低水平.
Landscape indices and characteristics of landscape pattern change were qualified and analyzed across Kunming surburbs.The study was based on interpretiry of Landsat MSS/M/ETM+images from 1974,1992,2000,2006,with GIS/RS technology.The results showed that:① Owing to the anthropogenic disturbance,the natural landscape was gradually replaced by man-made landscape between 1974 to 2006.Newly-increasing construction land was mainly from the cultivated land,and occupied other types more during later stage;② The dominance of forest,shrub and cultivated land deceased significantly,meanwhile they gradually transformed to disadvantaged landscape types.Landscape fragmentation intensified and connection declined during 32 years.SHDI increased to 1.7754 and SHEI increased to 0.8538.Landscape pattern exhibited a tendency of diversification and homogenization.Landscape shape became simple first and then complicate,which showed that urban expansion evolved from low-level to high-level;③ Low landscape aggregation and connection,high diversification and homogenization would last for a long time.It also indicated that ecological security was in low class.
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第S1期338-343,共6页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金项目资助(06GJ051k01)
