东北阔叶红松林群落类型划分及物种多样性

运用TWINSPAN分类方法,对我国东北阔叶红松林群落类型进行划分,对乔木层树种进行聚类,并对东北地区长白山、大秃顶子山、平顶山和丰林保护区4个样点的物种多样性进行对比研究.结果表明:24个样地中共记录到维管束植物264种,隶属于64科147属.经过聚类,将阔叶红松林划分为3个群落类型组和7个群落类型;同时,将33个乔木树种间的关联性划分为8组.阔叶红松林群落的物种丰富度和多样性为草本层>灌木层>乔木层.在4个样点中,长白山的样地平均物种丰富度最高,为63.长白山和大秃顶子山乔木层和灌木层的物种多样性略高于平顶山和丰林保护区;丰林保护区草本层的物种多样性为2.83,高于其它3个样点.平顶山灌木层和长白山草本层的均匀度最低,分别为0.71和0.80.

Community type and species diversity of broadleaved-Korean pine mixed forest in Northeast China

In this paper,the community types of broadleaved-Korean pine mixed forest in Northeast China were identified,and the groups of tree relationship were established based on TWINSPAN.The species diversities at 4 locations in Northeast China,i.e.,Changbai Mountain,Datudingzi Mountian,Pingding Mountian and Fenglin Nature Reserve,were compared.The results showed that 264 species belonging to 147 genera in 64 families were recorded in 24 plots,and the 24 plots were identified into 7 community types and 3 groups.The 33 tree species were divided into 8 groups according to their relations.Herbaceous plants possessed the greatest species richness and diversity,followed by shrubs and trees.At the 4 locations,Changbai Mountain owned the highest average species richness of 63.The diversities of tree layer and shrub layer in Changbai Mountain and Datudingzi Mountain were higher than those in Pingding Mountain and Fenglin Nature Reserve.The diversity of herb layer in Fenglin Nature Reserve was 2.83,being higher than that at other 3 locations.The shrub layer in Pingding Mountain and the herb layer in Changbai Mountain had the lowest evenness of 0.71 and 0.80.