井冈山观光木所在群落特征研究

STUDIES ON THE CHARACTERISTICS OF COMMUNITIES WITH MICHELIA ODORA IN JINGGANG MOUNTAINS

对井冈山观光木所在群落3个样地的物种组成、区系成分和物种多样性等特征进行了统计和分析。结果表明:该群落有维管植物34科47属52种,其中蕨类植物有8科8属9种,被子植物26科39属43种;区系分析显示该群落植物区系起源古老,地理成分复杂,热带性成分占绝对优势,温带性成分占有一定的比例;群落物种多样性分析显示该群落物种多样性指数偏低,各样地间多样性指数具有一定的差异;测度观光木所在群落物种多样性时,各种多样性指数基本表现出相同的趋势;总体来看,该群落物种多样性在群落不同层次的变化规律为:灌木层>乔木层>草本层。

Species composition, flora analysis and species diversity characteristics of communities with Michelia odora in Mt.Jinggang were analyzed, according to the statistics from 3 sample plots.The result show：there are 52 species of vascular plants in these communities（including varieties） with Michelia odora, belonging to 34 families and 47 genera, in which the pteridophyte accounted for 8 families 8 genera and 9 species, the angiosperm 26 families, 39 genera and 43 species, and no species of the gymnosperm;The floristic analysis shows the flora posses some species originated before Quaterary, the geographical element is complex, and the tropicai element dominant the whole vascular plants, temperate element took some proportion.Communities with Michelia odora had slightly low species diversity index, which has a little difference among investigated plots, the variation patterns of species diversity of communities with Michelia odora were similar whichever the index was used.Generally, the order of the magnitude of species diversity was：shrub layer〉 tree layer〉herb layer.