摘要
基于合肥市2002年土地利用图,利用ArcView软件和景观格局分析程序Fragstats3.3,选择22个景观格局指数,探讨了合肥市景观格局指数随不同粒度的变化特征,并对部分景观指数的拟合函数和变异系数进行了分析.结果表明:在10～100m粒度范围内,各景观格局指数随粒度增加表现出不同的变化趋势,说明空间粒度变化对景观格局指数具有明显的影响;所选用的22个景观格局指数的粒度效应可划分为总体上升、总体下降、变化不大、无变化规律4种情况;部分景观指数随粒度变化的响应曲线可分别用二次函数、三次函数、幂函数、线性函数进行拟合;对于合肥市1∶50000土地利用图而言,进行景观格局指数分析的适宜粒度范围在15～35m.
Based on the land use map of Hefei in 2002,and by using ArcView software and Fragstats 3.3 spatial analysis program,this paper studied the change characteristics of selected 22 landscape pattern indices of Hefei under effects of different grain size,and analyzed the fitting functions and variation coefficients of partial landscape indices. The results showed that with the grain size increased from 10 to 100 m,the selected indices displayed different change trend,illustrating that the change of grain size had obvious effects on landscape indices. The effects of the grain size could be classified as 4 kinds of situation,i.e.,overall rise,overall drop,less change,and no regulation change. The response curves of landscape pattern indices to grain size were fitted by quadratic function,cubic function,power function,and linear function,respectively. For the 1：50000 land use map of Hefei,the suitable range of grain size for computing and analyzing landscape indices was 15-35 m.
出处
《应用生态学报》
CAS
CSCD
北大核心
2010年第5期1167-1173,共7页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(40671117
40771117)
安徽省高校省级科研项目(KJ2010A121)资助
关键词
景观格局指数
粒度
尺度域
合肥市
landscape pattern index
grain size
scale domain
Hefei City.
