浙江天台山落叶阔叶林特征研究

天台山次生落叶阔叶林植物种类丰富 ,科属组成分散。区系成分复杂 ,从属的地理成分来看 ,温带、亚热带分布的类型居多。群落的生活型高位芽植物最多 ,地面芽植物次之。该群落叶的性质以小型叶、单叶、草质、非全缘为主。群落各样地间的相似系数除沟谷 3样地有较高的相似性外 ,其余各样地的相似系数均较低。群落物种多样性指数较高 ,各样地间多样性指数测值变幅较大。群落垂直结构复杂 ,地上成层明显。样地内多数优势种群的年龄结构为衰退型 ,群落的种类组成不稳定。乔木层中多数优势种群的分布格局呈随机分布或均匀分布 ,部分呈集群分布。

A study of deciduous broad-leaved forest feature in the Tiantai Mountain of Zhejiang

There are various plants in the deciduous broad leaved forest at the Tiantai Mountain, and its family and genus are of scattered composition. Their floral composition is complicated. In terms of genus geographical elements, many of them are distributed in temperate or subtropical zones. According to Raunkiaer's statistics of life form, the life form phaenerophyte of this community numbers first, and the hemicryptophyte second. The features of the community leaf is mainly microphyll, simple, herbaceous and unentire. All the coefficients of similarity in different plots of the community are low except that there is a comparatively high coefficient of similarity in three gully plots. The diversity index of the community species is rather high, and the measurement values of diversity index among various plots has a rather wide range of change. The vertical structure of community is relatively complicated and its supraterraneous stratification is remarkable. The age structure of most dominant species in the community is declining, and the community species composition is unstable. The distribution pattern of most dominant species in the tree layer is of random distribution or uniform distribution while the distribution pattern of some dominant species is of clumped distribution.