【摘要】 土地利用与景观格局的变化能直观地反映出区域相应的生态环境变化。基于拉萨市1990、2000、2010与2018年土地分类遥感监测数据为基础，借助GIS与Frag stats进行了拉萨市土地利用动态与景观格局指数分析。结果表明：(1)拉萨市以草地与未利用地为主要地类。除草地外，其余各地类的面积均有所增加，其中以林地面积增幅最大；(2)2000～2010年土地利用类型分布与景观格局变化明显强于其他两个时期；(3)地类主要分布的空间格局主要在2000～2010年间发生改变。(4)拉萨市的景观破碎度下降，优势景观优势度减弱，丰富度增加，斑块集聚度减弱，斑块分布更加均匀。更多还原

【Abstract】 Changes in land use and landscape patterns can intuitively reflect the corresponding changes in the regional ecological environment. Based on the remote sensing monitoring data of land classification in Lhasa in 1990, 2000, 2010 and 2018, the land use dynamics and landscape pattern index of Lhasa were analyzed by GIS and Frag stats. The results show that:(1) Grassland and unused land are the main land types in Lhasa. Except for grassland, the area of other land types has increased, of which forest land has the largest increase.(2) The distribution of land use types and landscape pattern changes from 2000 to 2010 were significantly stronger than those of the other two periods.(3) The spatial pattern of the main distribution of land types mainly changed from 2000 to 2010.(4) The fragmentation of the landscape in Lhasa has declined; the dominant landscape of the dominant landscape has weakened; the richness has increased; the degree of patch agglomeration has decreased, and the distribution of patches has become more uniform.更多还原