INFLUENCE OF URBANIZATION ON SPATIAL PATTERN OF LAND COVER:A CASE OF CHANGSHA,HUNAN PROVINCE
利用1973-2005年多期遥感影像分析长沙市土地覆盖变化，发现建设用地和非森林植被变化显著，非森林植被是城市化的主要牺牲品，景观格局从随机分布转向局部聚集，不同土地覆盖类型受城市化影响差异明显。
Researches on land cover and its landscape pattern change under urbanization are essential for analyzing the impacts of human activities on environment.This study firstly detected land cover changes in Changsha City from 1973 to 2005 by using the multi-temporal landsat images(TM1973,TM1993,TM1998,ETM+2001) and land use map(2005);and then analyzed the spatial variations of landscape pattern at landscape-level and class-level by using FRAGSTATS,respectively.At last,the class-level metrics of each land cover class were further regressed to the degree of urbanization.The results indicated that: ①in the context of urbanization,the built-up area and the non-forest vegetation experienced a significant changes,while the forestland and water remained relatively unchanged,and the non-forest vegetation cover bore the major burden of urbanization;②with the advance of urbanization,the change of overall landscape pattern of Changsha represented a complex dynamic process:’ through stochastic distribution to local convergency’;③obvious differences of impacts of urbanization on landscape patterns of various land cover classes existed;④some class-level metrics of various land cover classes were strongly correlated to the degree of urbanization,but the correlated extend varied along with the various land cover classes.The results have potential to aid in urban planning and land-use planning.