暖温带石灰岩山地森林种群格局的分形特征研究

Fractal analysis of the forest population pattern at Limestone Mountain Area in Warm Temperate Zone

从空间占据的角度入手,计算了研究区域内4种主要林分共6块样地的计盒维数。计算结果表明6块样地均存在贯穿于研究尺度的自相似规律,其中赤松林样地的计盒维数最大,而刺槐林样地的计盒维数差异较大。计盒维数的大小和不同植被的生态学特性和立地条件有关。最后从空间占据的角度对区域生态安全格局的维持和生态恢复提出了建议。

Using the fractal analysis approach, we calculate the box - counting fractal dimension of six quardrats, among which are the four major forest type at limestone mountain area in warm temperate zone. The result shows that throughout the study scale there is a linear disciplinarian, which, in other words, may be called self similarity. Pinus densiflora Sieb. et Zucc. forest shows the largest box- counting fractal dimension of all, while Robinia pseudoacacia L. forest shows distinct difference. The value of box - counting fractal dimension is associated with ecological property and the stand condition. At last, we draw some reasonable advice to the maintenance of regional ecological security and ecological restoration.