中文摘要：

利用林分空间结构参数——混交度、大小比数和角尺度,分析长白山金沟岭林场云冷杉针阔混交林从1989—2005年的空间结构信息演变过程。研究结果表明：该林分已由随机分布过渡到轻度聚集分布;林分内各树木之间的直径差距逐渐缩小;该林分已经从中度混交过渡到强度混交。随着森林演替的进程,林分中杨树、白桦和蒙古栎等先锋树种逐渐退出所在群落,而当地云杉、冷杉和红松等顶级群落树种则演变为优势树种。文中利用空间格局方法研究森林演替过程中的结构变化,从而反映云冷杉针阔混交林的演替过程动态变化格局。

英文摘要：

Three spatial structure parameters,mingling degree,neighborhood comparison,and uniform angle index,were used to analyze the succession of spatial structure in a spruce-fir secondary mixed forest in Changbai Mountain from 1989 to 2005.Results showed that the spatial pattern of the stand changed from a random distribution in 1989 to a slightly clumpy distribution in 2005,and the differences in diameter size between various individuals in the stand were gradually narrowing.The mingling degree of the spruce-fir mixed stand had already changed from moderate to strong.With the progress of the succession stages,pioneer tree species such as Betula platyphylla Suk.,Populus davidiana Dode.and Quercus mongolica Fisch.ex Ledeb.gradually disappeared in the community,but the climax species such as Pinus koraiensis Sieb.et Zucc.,Abies spp.Mill.and Picea asperata Mast.became the dominant tree species.The application of spatial structure parameters to the study of structural changes in the process of secondary forest succession could reflect the dynamics of forest succession.