小五台森林群落特征及林下物种多样性研究

本文根据小五台森林群落的实地调查数据，详细分析比较了各个不同群落类型的物种多样性及相似性。结果表明：小五台山11个森林群落类型中，林下物种共有67种。其中，灌木19种，草本48种。灌木物种丰富度在各个群落中均小于草本层，尤其是落叶松林群落的差异更为显著；草本层以落叶松林、冷杉林为最大。物种多样性两种指数变化趋势相似，栎林、山杨林、落叶松白桦针阔混交林多样性指数较高，其他相对小些。灌木层与草本层的均匀度变化无规律。相似性上灌木层山杨林与落叶松白桦混交林之间共有种最少，相似性最小；草本层相似性系数最大的是云杉桦木针阔混交林与白桦林、白桦林与落叶松白桦混交林。

Study on Forest Community Characters and Species diversity of Xiaowutai

According to the fieldwork data, the species diversity and similarity are analyzed and compared. The results are as follows: There are 67 understory Plants among 11 forestry community types. Shrub plants are 19. Shrub layer’richness is higher than herb layer. Two kinds of diversity indexes show the similar trend. There are no certain laws between shrub and herb’evenness. Poplar forest and the mixed forest of Larch and Birch has the lest similarity among shrub layer. The mixed forest of Spruce and Birch and Birch forest、Birch forest and the mixed forest of Larch and Birch have the highest similarity.