浙江安吉山区森林景观空间格局动态分析

森林景观空间结构分析 ,是认识森林景观结构、功能动态的重要途径 .运用景观生态学原理 ,借助地理信息系统技术 ,选取斑块面积、斑块分维数、斑块面积变异系数及标准差、景观多样性、景观优势度等指标 ,分析了安吉山区森林景观的空间分布格局特征 .从 1 985年至 1 999年显示森林斑块面积变异系数及标准差从 1 .487、 2 .373到 1 .70 0、 3.844,呈明显增大趋势 ;森林景观形状指数从 83.69到 91 .5 ,呈增大趋势 ;景观优势度从 0 .868到 0 .80 7,呈减弱趋势 ;森林景观破碎度从 9.1 5 %到 8.32 % ,呈降低趋势 .反映出由于生态公益林面积的逐年增加 ,林种结构比例的适度调整 ,林区生境趋向于多样化良性方向发展

Analysis on the Spatial Pattern Dynamic of Forest Landscape in Anji Mountainous District,Zhejiang Province

The analysis of spatial structure is the important approach to understand landscape structure and functional dynamic of forest landscape under the influence of people,the patch area,fractal dimension,variability coefficient and standard deviation of patch area,landscape diversity,landscape dominance are calculated by models and GIS to analyze spatial distribution and pattern of forest landscape in Anji mountainous district From the period of 1985 to 1999,coefficient of variability and standard deviation of patch area increase,and shape coefficient of forest landscape increases,but dominance and fragment index of forest landscape decrease The forest dynamic shows that forest habitats are becoming more diversified in fine way under area increment of ecological public forest and structure regulation of forest species