福州市土地利用景观格局动态分析

在GIS和Fragstats的软件技术支持下,以1988年和2008年福州市两期的土地利用图为数据源,对福州市的土地利用类型及其景观格局指数进行统计分析。结果表明,20年来福州地区的土地利用景观类型以耕地、林地和建设用地为主,土地利用变化主要是耕地、林地和水体转化为建设用地。斑块数量和斑块密度增加,景观破碎化程度加剧,多样性指数上升,优势度下降,景观格局趋于均质稳定化。斑块聚集度下降,向离散化方向发展,景观蔓延度也降低,进而反映了人为活动对土地利用变化的影响。

Analysis on Dynamics of Land Utilization and Landscape Pattern in Fuzhou City

According to the land use maps of Fuzhou city in 1988 and 2008,depending on the support of GIS and Fragstats,this paper analyzed the land use type and landscape pattern in Fuzhou city.The results showed that the main land use types in this area were cultivated land,forest land and building land in the past 20 years,the land use change in Fuzhou was caused mainly by the conversion of cultivated land,forest land and water region to building land.The total patch number and patch density of the landscape increased,the degree of landscape fragmentation exacerbated,the landscape diversity index increased,while the dominancy of the landscape decreased,so the landscape pattern tended to stabilization and homogenization.The aggregation of patch gradually descended to the discrete direction,and the contagion degree of the landscape also reduced,these reflected the influences of human activities to the change of land use.