后河自然保护区珍稀植物群落结构及更新特性

以湖北五峰后河自然保护区1 hm2珍稀濒危植物群落为对象,应用固定样方法调查了群落种类组成和结构,并对主要组成树种的种群结构和更新特性进行分析,同时对群落所处的演替阶段进行了探讨.结果表明:①依据胸径频率分布的形状,将19个主要树种种群结构归纳为4种类型:单峰衰退型、间歇型、倒-J型、L型.②单峰衰退型树种在群落中几乎...

Population structure and regenerative characteristics of major tree species of rare plant community in Houhe Nature Reserve

This study was made on a permanent plot in a rare plant community in the Houhe Nature Reserve,central China.The authors identified and measured all trees in the plot to quantify the community structure and regenerative characteristics of the forest.The forest community was comprised of 19 major tree species including 5 rare and endangered species.The population structures of the different tree species were categorized into four regeneration types based on their size-class frequency distribution patterns:Unimodal type,Sporadic type,Inverse-J type,L type.Unimodal type species were the lack of regeneration seedlings.The sporadic type species and inverse-J type species were major trees in canopy,which could regenerate through seeds and sprouts from roots and stumps.The evergreen broad-leaved tree species with L type had few size classes,which sexual reproduction was preponderant.The successional stage of the forest was classified as a climax community,the rare and endangered tree species were stable and they would live for a long time in the community.