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以长丰县森林资源二类调查为本底数据,在GIS软件支持下,选取斑块分维数、斑块形状指数、景观破碎度、景观多样性指数,对该县2003和2006年林地与树种组景观结构特征进行分析。结果表明,林地类型由4种增加到5种,乔木纯林地为优势林地类型;林地斑块形状比较规整。乔木混交林地形状指数最大,斑块周长也最为复杂。现有10个树种组,优势树种组为杨类,期间杨类斑块数增加1967个,树种结构单一;树种组斑块分维数值变化不大,斑块形状比较规整;树种组斑块周长较复杂;杨类斑块密度变大,破碎度上升,经果林斑块密度变小,破碎度下降。
Based on the investigation of the second kind of forest resources in Changfeng County, with the support of GIS software, fractal dimension, patch shape index, landscape fragmentation index and landscape diversity index were selected. Group landscape structure characteristics analysis. The results showed that the types of forest land increased from 4 species to 5 species, while the tree species pure woodland was the predominant woodland species. The patch shape of forest land was relatively regular. The shape index of mixed forest is the largest, and the patch circumference is the most complicated. There are 10 species in the tree species group and the dominant tree species are the Yang species. The number of the plaques in Yang species increased by 1967 and the tree species was single in structure. The fractal dimension value of tree species group changed little and the plaque shape was more regular. Longer and more complex; poplar plaque density becomes larger, the degree of fragmentation increases, the fruit plaque density becomes smaller, the degree of fragmentation decreases.