样方法及其在林分空间格局研究中的应用

该文对测定空间格局的方法进行了总结和分类。利用定位标准地的资料,对非自然样方下测定空间格局的小样方面积进行了比较试验,提出了测定空间格局效果最好的小样方面积。应用样方法中的9种常用分布型和7种分布型指数,研究了大兴安岭林区落叶松天然林的林分空间格局;选出了适合此研究范围的理论分布型,用Iδ、G和Iwao指数研究了林分空间格局的个体聚集规模、个体群的分布规律、林分空间格局的时间动态以及林分空间格局变化与其他林分结构因子之间的关系等。

Plot Method and Its Application in Stand Spatial Distribution Patterns

Spatial patterns' assessing methods were newly classified according to the type of their original data. Based on the location data of forest stand and experiments comparing the changing plot areas of measuring the stand spatial distribution pattern , under the condition of unnatural unit taken, we proposed the most favourable size of a plot to be the mean space occupied by individuals. The 9 distribution functions and 7 spatial pattern indexes were used to study the stand spatial patterns of Larix gmelinii in northeast China. The Iδ, G and Iwao's indices were used in research on the cluster scale of single trees, the scattering character of the clumps, the dynamics of the pattern and the relation between patterns and other factors of stand structure.