茂兰青冈栎-黄樟群落特征

Community Characteristics of Cyclobalanopsis glauca(Thunb.) Oerst.-Cinnamomum parthenoxylon(Jack.) Meissn in Maolan

采用样地调查法,在代表性地带对茂兰青冈栎-黄樟群落进行了初步研究,以了解该群落的结构与物种多样性特征.结果表明,群落内共有植物147种,分属于56科119属;乔木层有51种,分属于28科43属;灌木层有81种,分属于40科74属;草本层有42种,分属于25科37属.群落内植物科的分布区类型以泛热带分布最多,达39.29％,其次是世界广布和北温带区域,分别达19.64％和17.86％.在群落垂直方面,乔木层高度5～10 m区间树种占50％左右,灌木层0～1 m的达62.97％,草本层15～30 cm的占47.26％,群落层次分层明显.乔木和灌木径级分布呈倒“J”形,更新良好.乔木层直径在中小径阶的植物达99.38％,灌木层和乔木层规律相似.茂兰青冈栎-黄樟群落物种丰富,结构稳定.研究可为喀斯特森林生态系统的修复、生物多样性保护、自然保护区的建设提供科学依据.

To understand the type of the plant community structure and characteristics of species,Maolan Cyclobalanopsis glauca （Thunb.） Oerst.-Cinnamomum parthenoxylon （Jack.） Meissn with the plant community was studied in the representative area with sample survey method.The results showed that the community was composed of 147 species,belonging to 56 families,119 genera including 51 species of arbor layer,belonging to 28 families,43 genera;81 species in shrub layer,belonging to 40 families,74 genera; 42 species of herb layer haves,belonging to 25 families and 37 genera.In the distribution types of communities within the plant division,pantropical distribution area was at biggest,reached 39.29％,followed by the world wide distribution and the north temperate regions,which were 19.64％ and 17.86％.In the vertical distribution of community,tree height of 5～10 m interval was in the majority,the proportion reached about 50％,shrub height value could reach 62.97％ in 0～1m tree species,height of herb layer in the range of 15～30 cm species reached 47.26％.Trees and shrubs diameter class distribution was inverted ＂J＂ shape and updating is good.Diameter of the tree layer in order plants trailed up 99.38％,with the tree layer and shrub layer had the similar laws.It is indicated that the community species were abundant and had stable structure,which could provide a scientific basis for restoring the karst forest ecosystem conserving biodiversity and nature reserves.