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应用梯度格局法在长白山北坡海拔700-2600 m之间每100 m设置一样地，共计20块样地，应用Jaccard指数，对植物群落间物种共有度的海拔梯度变化进行了分析。不同海拔群落间的共有度，无论以哪一层次的植物种来表达，基本都以与其最相邻海拔的群落之间为最高。相邻海拔群落的不同层次物种间的共有度变化存在相似性和相异性；但如相邻海拔的两个群落属于不同植被类型，其共有度则较低。群落间物种共有度的峰值与谷点反映了植被的海拔梯度格局，且灌木种的物种更替在这些地段具有非常明显的规律。在同一海拔差群落间的共有度数值都非常接近，并均随着海拔差的增加呈明显的下降趋势，表明群落各层次物种的构成有很大的相关性。
Gradient pattern method was used to set the same plot for every 100 m on the north slope of Changbai Mountain between 700-2600 m. A total of 20 plots were sampled. The Jaccard index was used to analyze the change of altitude gradients of the species diversity of plant communities. Communities at different altitudes, no matter what level of plant species to express, are basically the highest among the communities with their most adjacent altitudes. There are similarities and dissimilarities in the changes of the commonalities among different levels of adjacent altitudinal communities. However, if the two communities at adjacent altitudes belong to different vegetation types, their commonalities are lower. The peaks and valleys of inter-communal species sharing reflect the pattern of elevation gradient of vegetation, and species alternations of shrub species have very obvious regularities in these areas. The community values of the communities with the same altitude were very close and both showed a significant downward trend with the increase of altitude difference, indicating that the composition of species at all levels of the community had a great correlation.