长白山温带针阔混交林结构与动态的研究

通过１０ａ的定位观测，研究了长白山地区针阔混交林结构 的动态变化。树种及其分布基本保持不变，林分密度从４０４株／ｈｍ＾２降至３８７株／ｈｍ＾２，而基础面积从４４．８３ｈｍ＾２降至４３．７９ｈｍ＾２。除色木槭之外，冠层林木的株数降低。优势树种的更新状况不佳。死亡与更新的关系表现在群中植物组成的变化上。当红松开始衰退时，落叶树种的优势明显上升。几种阔叶树的胸径分配与个体的大小相关。不同胸径等级上的最大

STRUCTURE AND DYNAMICS OF A TEMPERATE DECIDU OUS CONIFER MIXED FOREST IN CHANGBAI MOUNTAIN *

The changes in structure of a deciduous conifer mixed forest in Changbai Mountain,northeast China,were investigated in a permanent plot with a 10 year interval.Species and size distribution remanined almost no changes.Stand density was reduced from 404 to 387 stem/hm 2,and basal area from 44 83 to 43 79 hm 2.All species in high canopy layer except Acer mono decreased in number of stems.The regeneration of the dominant species was poorly represented.The death recruitment relationship showed that the community was changing in composition.The dominance of deciduous components tended increasing while Pinus koraiensis was declining.The stand is considered a patch in its matured phase,and species change was in proceeding.