四川青城山穗花杉种群和群落特征的初步研究

本文对四川省都江堰市青城山境内的穗花杉群落进行了初步研究，首次揭示了穗花杉群落和种群的基本特征．穗花杉种群具明显的增长型特征，处于良好的发育状态，其空间分布格局为集群型，其生态习性为显著的耐阴性和岩生性．穗花杉植物群落植物区系成分表现为古老性、残遗性和特有性的有机融合，群落内有维管束植物１１１种．其中热带区系成分占优势．生活型话以常绿高位芽植物为主．而其中又以常绿小高位芽和常绿中高位芽植物占优势．群落中植物叶的性质亦与常绿阔叶林相似。由于常绿针叶植物穗花村在群落中居优势地位，因此作者认为该群落是亚热带常绿阔叶林中的一类特殊群落类型。

A PRELIMINARY STUDY ON THE POPULATION AND COMMUNITY OF AMENTOTAXUS ARGOTAENIA ON QINGCHENG MOUNTAIN, SICHUAN PROVINCE

The community characteristics are analysed on the basis of the floristic composition,physiognomy and structure, as well as the population characteristics of Amentotaxus argotaema on Qingcheng mountain. The survival curve and the age structure of Amentotaxus argotaenia population suggest that the population is an increasing type of the nature community.The population has obvious shade-adapted and rock-growed properties. Maybe it is an adaptive selection of the relic population in the natural evolution. Between the studied community and the subtropical evergreen broad-leaved forest there is no distinction in tropical floristic component, temperate component, life form spectrum, leaf size class spectrum and leaf texture spectrum, but the endemism, ancient and relic nature exist obviously in the studied community. It seems that the Amentotaxus argotaenia community is a special community type of subtropical evergreen broad-leaved forest.