贵州柏箐喀斯特台原区珙桐群落特征研究

利用群落和种群研究的常规方法，对贵州喀斯特台原区柏箐自然保护区内珙桐群落进行研究，结果表明：珙桐群落主要优势种群为珙桐和五裂槭，重要值分别为142．93和61．79。两种群间呈正联结关系，均为集群分布，但五裂槭聚集强度高于珙桐；五裂槭为进展种群而珙桐种群因幼树缺失为衰退种群；群落灌木层树种稀少，物种多样性低于乔木层。导致珙桐种群幼树缺失和灌木层树种稀少的原因是人为经营活动。因此，必须对珙桐群落实行绝对保护。

Study on characteristic Davididia involucrata community in Baiqing Karst platform area in Guizhou

Davididia involucrata community of Baiqing Reserve in Karst platform area in Guizhou province was researched by the routing studying method about community and population. The result was showed that Davididia involucrate and Acer mono were dominant population, as which important value were 142.93 and 61.79 respectively;there was positive association between Davididia involucrate and Acer mono ;their distributes were clump, but the cluster intensity of Acer mono was higher then Davididia involucrate. Acer mono was belong to the stable population ,but Davididia involucrate was degeneration population because of lacking seedlings. Species diversity index in tree layer was higher than that in shrub layer as result of to be a few of tree species. The reason of decreasing tree species and lacking Davididia involucrate seedlings in shrub layer was human disturbance. Therefore, Davididia involucrate community had to be protected.