浙江天台山七子花群落优势种群结构及物种多样性研究

七子花 (Ｈｅｐｔａｃｏｄｉｕｍｍｉｃｏｎｉｏｉｄｅｓ)为我国特产的落叶小乔木 ,属忍冬科的单种属植物 ,现资源极少。在浙江省天台山分布着一小片以七子花为优势的群落 ,作者曾对该群落特征和种群结构作了初步的研究4 ,5] 。本文通过对该群落优势种群的年龄结构和物种多样性进行分析 ,探讨该群落优势种群的年龄动态和物种多样性特征 ,为七子花群落的保护与持续利用提供科学依据。1　研究地和方法1 1　研究地自然概况研究地区位于浙江省天台山主峰华顶山北侧狮子岩坑处 ,地理位置为 2 9°15′Ｎ、12 1°0 6′Ｅ。有关其自然概况报道较多…

Dominant Population and Species Diversity of Heptacodium miconioides Community at Tiantai Mountain in Zhejing Province.

The age structure and dynamics of dominant species Heptacodium miconioides at Tiantai Moduntain in Zhejiang Province were analyzed by adopting the method of "spatial series substituting for time series".The results indlicate that the age-class of the Heptacodium miconioides population is incomplete.The population's survival curves are not linear,and its age structure is declining.The age structure for most of the other dominant populations is also declining,which indicates that the Heptacodium miconioides community is unstable.The species diversity of Heptacodium miconioides community consists in the fact that the woody plants are rich,and the species diversity index is higher than that of the herbs.In terms of species richness distribution,both the woody and herbs fix to the logrithmic scale distributions,which means that the number of the sparse species is bigger than the enriched species,and that the community's evenness is relatively small.