湖北来凤楠属植物群落物种构成及特点研究

本文利用分类学、生态学方法对湖北来凤楠属植物群落物种组成与结构进行调查分析。结果表明:来凤县有桢楠(Phoebe zhennan S.Lee et F.N.Wei)、闽楠(Phoebe bournei(Hemsl.)Yang)2种楠属植物,而桢楠数量最多,分布最广。具体分析调查结果可知:来凤桢楠林群落物种多样,共有维管束植物30科42属46种,含单种植物的属偏多,桢楠是群落优势种;泛热带分布科占绝大多数;群落中有27种高位芽植物,地上芽植物偏少;桢楠种群结构不合理,属衰退型,桢楠的优势地位可能被取代。

Research on the Specice composition and features of Phoebe plant community in Laifeng County,Hubei Province

In this paper,the composition and structure of the genus Phoebe Nees community in Laifeng County of Hubei Province were investigated and analysed by systematic and ecological approaches.The results showed that Phoebe zhennan S.Lee et F.N.Wei and Phoebe bournei (Hemsl.) Yang are present in Laifeng.Phoebe zhennan is the most widely distributed species.Phoebe zhennan plant community is rich in species.The vascular plants found include 46 species in 30 genera of 42 families,with majority of the genera containing only a single species.Phoebe zhennan is the most dominant species in the community.The plant community belongs to pantropic type,including more (27 species of) phaenerophytes and less chamaephytes.The population structure of P.zhennan is not sustainable,belonging to decline population type,and the species’ dominance may be replaced in this plant community.