以茂兰国家级喀斯特森林自然保护区为研究对象,对区内3个演替阶段(早期、中期、后期)的植被进行群落学调查。以重要值为依据选取优势种,从年龄结构、生命表特征、存活曲线等研究樟叶槭、石岩枫和齿叶黄皮3个优势乔木种群的结构及动态特征。结果表明:石岩枫从演替早期-演替中期-演替晚期胸径频率为L型-间歇型-L型,其种群为增长型;樟叶槭在整个演替序列胸径频率均为L 型,为增长型种群;齿叶黄皮在整个演替阶段胸径频率均为间歇型,为间歇性发展型。石岩枫演替早期存活曲线接近Deevey Ⅱ型,演替中期不符合Deevey型分布,演替晚期符合Deevey Ⅲ型;樟叶槭演替早期、中期和晚期的存活曲线均接近 Deevey Ⅲ型;齿叶黄皮演替早期和晚期的存活曲线为Deevey Ⅲ型,演替中期的存活曲线无规律。

Based on investigation on the communities,three dominant species at three succession stages of karst forest in Maolan National Nature Reserve were selected as the object of research through the calculation of important values.The dynamic characteristics of age structure,life table and survival curve of Clausena dunniana,Acercinn amomifolium and Mallotus repandus were studied.The results showed that the change of diameter at breast height frequency of Mallotus repandus was L pattern-interval pattern-L pattern from succession early stage to later stage and the population was growth form;The change of diameter at breast height frequency of Acercinn amomifolium was all L pattern and the population was growth form;The change of diameter at breast height frequency of Clausena dunniana was all interval pattern during the period of succession stages and the population was interval developmental form;The survival curve of Mallotus repandus was nearly DeeveyⅡtype in early succession stage,it was not Deevey type in middle succession stage and it conformed to Deevey Ⅲ in late succession stage;The survival curve of Acercinn amomifolium was all nearly Deevey Ⅲ during the succession period;The survival curve of Clausena dunniana was Deevey Ⅲ in early and late succession stage,but it was disorder in middle succession stage.The research results could provide scientific basis for rehabilitation and reconstruction of degraded karst forest ecosystem.