不同径级和密度下黄山松天然林物种多样性特征（英文）

发布时间：2024-03-17 09:54

　　黄山松是中国特有树种。为揭示黄山松天然林不同林龄径级结构与物种多样性特征,在麻城市黄山松天然次生林选择4个典型样地开展调查,研究黄山松径级结构与林分密度、群落物种多样性以及群落不同样地物种多样性相似性之间关系。结果表明:黄山松为群落优势种,在IV径级时,植株数量与全部植株比达到峰值,为19.46%;在VII径级时该比值出现第二次峰值,为18.92%;群落内维管植物156种,隶属于71科130属;林分平均密度最低时(1200 trees ha?1, DBH=36.779±4.444 cm),乔木层多样性(H’=1.6716)和均匀度(E=0.6727)最高;在林分平均密度最高时(1525 trees ha?1,DBH=18.957±5.141cm),灌木层丰富度(Dma=5.4308)、多样性(H’=2.9612)和均匀度最高(E=0.8985)。在林分密度为1325 trees ha?1时,草本的丰富度(Dma=5.8132)、多样性(H’=3.0697)和均匀度(E=0.9025)达到最大值。垂直结构上α多样性指数为:草本层>灌木层>乔木层;郁闭度增高会减弱群落林分内光照...

【文章页数】：9 页

【文章目录】：
1 Introduction
2 Research area and methods
    2.1 The general situation of research area
    2.2 Survey and sampling
    2.3 Diameter class
    2.4 Analysis of species diversity
    2.5 Similarities of species diversity
3 Results and analysis
    3.1 Diameter class structure
    3.2 Species composition under different forest densities
    3.3 Effects of forest density on species diversity
    3.4 Importance values at different forest densities
    3.5 Comparison and analysis of similarities of diversity
4 Discussion
    4.1 Diameter class structure and the forest succession trend
    4.2 Forest density and species composition
    4.3 Variations in the characteristics of species diversity
    4.4 Similarities of species diversity in the sample plots
5 Conclusions



本文编号：3930849