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作 者 ：钟晓青 张宏达 方炜

期 刊 ：林业科学 1996年 32卷 4期 页码：305-310

关键词：群落动态；分层频度法；进展种；衰退种；稳定种；

Keywords:Community dynamics, Method of divided-stratum frequency, Developing species, Stable species, Declining species,

摘 要 ：运用W.比特利希的可变样圆半径的角规标准地法,在广东封开黑石顶自然保护区选择一种亚热带常绿阔叶林群落,随机布设20个可变半径为50D(D为林木胸径)的调查样圆。调查研究该群落的植物区系及各个树种的密度、相对密度、频度、相对频度、显著度、相对显著度及重要值并据此确定群落的优势及亚优势种;运用分层株数及频度的方法思想把群落按树种分为下层:Ⅰ层,10m以下;Ⅱ层,10—20m;Ⅲ层,20m以上。根据同一树种在以上三层中频度和株数的变化规律及该树种的生态学和生物学特性,初步把该群落的主要树种划分为四种类型:衰退型:如马尾松、福建青冈、米椎;进展型:如黄果厚壳桂、红鳞蒲桃、显脉新木姜;稳定型:如绒英红豆、短花序楠;待变型:如小硬叶楠、铁榄等。应用分层频度(株数)法不仅可以预测某一植物群落区系的未来群落优势种,及未来群落上层树种的结构动态,还可以作为群落是否达到顶极状态的一项数量判别方法。

Abstract:With the method of the diameter-changeable sampling plots, the dynamic development of a kind of subtropical broadleaved forest was studied in Heishiding, Hongkai County of Guangdong Province. The vertical structure of the forest was divided into 3 stratums: Ⅰ. under 10m; Ⅱ. 10-20m; Ⅲ. over 20m. The density, frequency and domination of tree species in each stratum were investigated. As the results 4 types of species were proposed and characterized: (1) Declining species: Pinus massoniana, Quercus chungii, Castanopsis carlesii; (2) Developing species: Cryptocarya concinna, Syzygium hancei, Neolotsea phanerophlebia; (3) Stable species: Qrmosia pachycarpa, Machilus breviflora; (4) Unstable species: Lithocarpus synbalanos, Sinosideroxylon wightianum.

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