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运用景观生态学基本原理,借助地理信息系统技术,利用地形位指数,分析伏牛山北坡森林景观动态变化的地形梯度特征。结果显示:森林景观动态变化与地形梯度有密切关系,1986和2003年,森林景观在地形梯度上的优势分布区间(Pie>1)分别为9～30和10～30,即在的中高地形梯度上,且有向高地形位略为移动的趋势。森林景观类型保持不变部分、森林景观转化为非森林景观类型部分和非森林景观转化为森林景观类型部分所对应的在地形梯度上的优势分布区间(Pie>1)分别为10～30,5～12和4～10、18～24。分析森林景观动态变化与地形位指数的相互关系,表明森林景观动态变化与地形位指数有显著相关关系。
By using the basic principles of landscape ecology and by using geographic information system (GIS) techniques, the terrain gradient index was used to analyze the topographic gradient features of forest landscape dynamics in the northern slope of Funiu Mountain. The results show that the dynamic change of forest landscape is closely related to the gradient of the terrain. In 1986 and 2003, the dominant distribution intervals (Pie> 1) of the forest landscape over the terrain gradient were 9-30 and 10-30, respectively. There is a tendency to move slightly toward the high terrain. For the part of forest landscape that remained the same, the dominant distributions (Pie> 1) corresponding to the part of forest landscape transformed into non-forest landscape type and non-forest landscape into forest landscape type part were 10-30.5 ~ 12 and 4 ~ 10, 18 ~ 24. Analysis of the relationship between forest landscape dynamic changes and terrain bit index shows that forest landscape dynamic change has a significant correlation with terrain bit index.