江苏泰州地区耕地占地率动态变化  

Dynamic change of cropland percentage coverage in Taizhou region of Jiangsu Province

作　　者：何舸[1] 刘茂松[1] 徐驰[1] 杨雪姣[1] 黄峥[1] 曹云龙[1] 李雨潼[1] 

机构地区：[1]南京大学生命科学学院,南京210093

出　　处：《生态学杂志》2010年第10期2016-2021,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金资助项目(40801068和30870433)

摘　　要：为揭示耕地变化过程及其变化规律,利用泰州市1995、2000和2006年LandsatTM遥感影像,采用邻域分析方法对1995—2006年泰州地区耕地占地率的变化过程进行了研究。结果表明:1995—2006年泰州地区耕地面积持续加速减少;耕地占地率在0～80%区间内,其平均相对变辐随占地率的增加而减小,而在80%～100%区间,则随占地率的增加而增大,80%左右相对变幅最小;比较发现,3个年度的耕地占地率频度分布曲线形状相似,但峰值及其对应的耕地占地率依次变小;2个时期耕地面积的变化量主要发生于40%～80%区间(约占总变化量的90%),构成耕地面积变化的主体;在空间上,研究期间占地率60%～80%区间分布区域大幅缩减,40%～60%区间在原有基础上迅速扩展,且聚落和道路分布密度相对较高的区域变化速度更快。研究表明,耕地的稳定性和面积变化的速率与耕地占地率密切相关。To understand the change process and change pattern of cropland in Taizhou region of Jiangsu Province,the dynamic change of cropland percentage coverage （CPC） in the region from 1995 to 2006 was analyzed,based on the Landsat TM images of 1995,2000,and 2006 by the method of neighborhood analysis. In 1995-2006,the cropland area in the region reduced continuously. The average relative amplitude of the variation of CPC decreased with increasing CPC from 0 to 80%,reached a minimum at 80%,and then increased with increasing CPC from 80% to 100%. The curves of pixel frequency-CPC in 1995,2000,and 2006 showed similar mono-peaked patterns,but the peak values and their corresponding CPC decreased from 1995 to 2006. The 40%-80% CPC zones accounted for about 90% of the area change of the cropland in the study period. The area proportion of the 60%-80% CPC zones decreased significantly,while that of the 40%-60% CPC zones increased rapidly. The reduction rate of CPC was prone to be increased in the areas with relatively dense settlements and roads. The results showed that the stability and the area change rate of the cropland in the region were both closely related to local CPC.

关 键 词：邻域分析 耕地变化 像元频度 景观背景 苏北平原 

分 类 号：F323.211[经济管理—产业经济]