轿子山自然保护区杜鹃群落植物多样性研究

Study on Plant Diversity of Rhododendron Community in Jiaozishan Nature Reserve

以样地调查法,用物种丰富度指数、Shannon-Wiener多样性指数、Simpson优势度指数、Pielou均匀度指数对轿子山自然保护区杜鹃群落植物多样性进行研究。结果表明:保护区内的杜鹃群落类型多样,主要有2个群系组,包括7个主要群系;群落中杜鹃属植物占有明显优势,但天然更新情况较差;红棕杜鹃灌丛物种多样性指数最高,洁净红棕杜鹃+斑鞘玉山竹林最低。总体上,轿子山自然保护区杜鹃群落具有较高的物种多样性和均匀度,较低的优势度,是发育较为成熟的群落。

Based on the data collected from the field investigation,the plant diversity of Rhododendron community in Jiaozishan Nature Reserve was studied by means of applying species richness index,Shannon-Wiener species diversity index,Simpson dominance index and Pielou evenness index.The results showed that there were diversified Rhododendron community types in this nature reserve.There were two main formation groups which included seven formations.Plants in genus Rhododendron occupied the dominant position in these communities,but the natural regeneration status was poor.The species diversity index of Rhododendron rubiginosum formation was the highest,whereas the index of Rhododendron rubiginosum var.leclerei ＋ Yunshania maculate formation was the lowest.On the whole,the values of species diversity and evenness indexes of the Rhododendron communities in Jiaozishan Nature Reserve were relatively high,while the dominance index was low,indicating that the communities were comparatively mature in development.