铜鼓岭自然保护区热带常绿季雨矮林的群落结构特征

Structural characteristics of tropical evergreen monsoon elfin forest in Tongguling National Nature Reserve

应用植物群落学方法,调查分析了铜鼓岭热带常绿季雨矮林的群落结构特征。结果表明,该群落优势树种为黄椿木姜(Litsea variabilis)、海南大风子(Hydnocarpus hainanensis)、滨木患(Arytera littoralis)、无患子(Sapindus mukorossi)和禾串树(Bridelia balansae)等。立木胸径及树高结构分析表明,该群落中2.5～7.5 cm胸径级的个体占有相当高的比例,树高2～8 m各级分布较均匀,整个群落处于稳定发展当中。分别运用y=aD+b和ω=aD+b对优势树种的胸径与树高和冠幅之间的关系进行拟合,显著性检验结果显示,除禾串种群外,各直线方程均存在极显著的相关性,因此今后的调查中可用胸径来估测树高和冠幅。

Structural characteristics of tropical evergreen monsoon elfin forest in Tongguling National Nature Reserve were analyzed using community methods. The results showed that dominant species in this community were Litsea variabilis, Hydnocarpus hainanensis, Arytera littoralis, Sapindus mukorossi and Bridelia balansae. Analysis of DBH and tree heights showed that individuals with DBH from 2.5 cm to 7.5 cm took up a large percentage in this community while tree heights from 2 m to 8 m distributed evenly, which demonstrated the stable development trends of the whole community. Besides, the correlation between DBH and tree heights, DBH and crown were studied in this research, and the results showed that noticeable correlation existed between DBH and tree heights, DBH and crown. The DBH can be used to infer the height and crown in the future.