长白山暗针叶林苔藓植物群落特征与林木更新的关系

暗针叶林是长白山亚高山地区的主要森林植被，林下苔藓植物资源极其丰富，有些地段苔藓盖度可达80％以上。苔藓植物作为暗针叶林的主要活地被物，其对林木更新的影响不容忽视。研究了苔藓植物的盖度和厚度对暗针叶林主要树种更新的影响。对苔藓层盖度及厚度与主要针叶树种及亚乔木树种幼苗数量的相关关系分析发现，当苔藓盖度大于40％或厚度大于4cm时，苔藓层对红松、臭冷杉、花楷槭幼苗数量的负面影响较明显；而在苔藓厚度小于4cm时，苔藓层有利于花楷槭和花楸幼苗数量的增加；对苔藓层盖度及厚度与针叶树幼苗高度的相关关系分析发现，一定盖度和厚度的苔藓层对幼苗高生长有积极作用，但其影响程度在各树种间有明显差异。

The relationship between the moss community characteristics and the regeneration in the dark coniferous forest of Changbai Mountain

abundant important cover and Dark coniferous forest is a major subalpine forest of Changbai Mountain, and in some places, their coverage can reach over 80%. Since the moss where the resources of bryophtes are is the main ground cover, it is very to study how it effects the forest regeneration. In this study, the moss community characteristics, such as moss moss depth, were used on how they affect the regenerations of the dominant species in the dark coniferous forest. We analyzed the correlations between moss cover, moss depth and seedling numbers of dominant species. When the moss cover was more than 40% , or its depth was more than 4 cm, the number of seedlings in Pinus koraiensis, Abies nephrolepis and Acer ukurunduense had significant negative correlations with the moss cover or its depth. But when moss depth was less than 4cm, the moss layer has positive effect on the seedlings of Acer ukurunduense and Sorbus pohuashanensis. Based on the analysis of the effects of moss cover and moss depth on coniferous seedling heights, it was found that under some condition, moss layers had positive effects on seedling heights of Pinus koraiensis and Picea jezoensis var. komarovii.