浙江天台山七子花群落优势种群结构及种间联结性研究

以浙江省天台山七子花群落为研究对象,对该群落优势种群的结构和分布格局进行了分析,结果是:组成该群落多数优势种群的龄级不完整,年龄结构为衰退型,七子花林是一个不稳定的群落;各优势种群在各样地中的分布格局均呈集群分布。用方差比率(VR)和通过2×2联列表进行X²检验的方法,检验了七子花群落乔木层18个主要树种、灌木层20个主要种类的总体相关性和各种对间的联结性。结果是乔木层主要树种间在总体上呈不显著的正相关,正联结的种对多于负联结的种对;灌木层主要种类间在总体上呈显著的正相关,正联结的种对明显多于负联结的种对。

A STUDY OF DOMINANT POPULATION STRUCTURE AND INTERSPECIFIC ASSOCIATION OF HEPTACODIUM MICONIOIDES COMMUNITY IN TIANTAI MOUNTAIN OF ZHEJIANG PROVINCE

The author analyzed dominant population structure and distribution pattern of the Heptacodium miconioides community in the Tiantai Mountain of Zhejiang Povince. The results showed that the age-class in majority dominant populations of the community was incomplete and the age structure was declining, and that the Heptacodium miconioides forest was an unstable community; that the distribution patterns of dominant populations in various plots were of clump distribution. Using veriance ratio(VR) and x² text by 2×2 contingency table, the paper analysed the overall relatedness between 18 major tree varieties of the tree-layer and 20 major varieties of the shrub-layer, and the interspecific association. It hence came to the following conclusion:In the tree-layer, there was unremarkable positive relatedness on the whole, and there were more species pairs of positive association than those of negative association; There was remarkable positive relatedness among the major tree varieties of the shrub-layer, and there were obviously more species pairs of positive association than those of negative association.