贵州百里杜鹃自然保护区不同演替阶段植物群落物种多样性
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引用本文:陈胜群,韦小丽,安明态,孔德明.贵州百里杜鹃自然保护区不同演替阶段植物群落物种多样性[J].西北植物学报,2019,39(7):1298~1306
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作者单位
陈胜群,韦小丽*,安明态,孔德明 (贵州大学 林学院贵阳 550025) 
基金项目:贵州省高层次创新人才培养计划(黔科合平台人才[2016]5661);
中文摘要:为了解贵州百里杜鹃自然保护区不同演替阶段植物群落物种多样性特征,该研究采用“空间代替时间”的方法,对该保护区内5个演替阶段的群落进行调查,并分析其物种组成、重要值、α及β多样性特征。结果表明:(1)研究区共调查到维管束植物56科103属140种,优势科有蔷薇科、杜鹃花科和百合科。(2)杜鹃花科植物在整个演替过程中占据综合优势地位,在各演替阶段灌木层重要值均排前三位。(3)沿进展演替方向,群落的Margalef丰富度指数(dMa)、Shannon Wiener多样性指数(He)、Simpson指数(D)及Pielou均匀度指数(Je)均呈现先上升后下降再上升的趋势,最后群落结构趋于复杂,稳定性上升。(4)随着演替的正向进行,群落间丢失和增加的物种数逐渐变多,物种替代率逐渐升高;物种相似性系数在整个演替过程中不相邻阶段间均表现为极不相似。研究认为,保护区应制定合理的保护措施,避免人为活动的破坏,提升群落稳定性,保护群落结构及物种多样性,为发挥生态功能及可持续发展提供科学支撑。
中文关键词:物种多样性  演替阶段  植物群落  自然保护区
 
Species Diversity of Plant Communities at Different Succession Stages in Baili Rhododendron Nature Reserve of Guizhou
Abstract:To understand the plant community species diversity characteristics at different succession stages in Baili Rhododendron Nature Reserve of Guizhou, we investigated the community of five succession stages in the protected area with the research method of “space instead of time”, analyzed species composition, important values, α and β diversity characteristics. The results were as follows: (1) a total of 140 species of vascular plants were investigated, belonging to 56 families and 103 genera. The dominant families were Rosaceae, Rhododendron, and Liliaceae. (2) Rhododendrons occupy a comprehensive dominant position in the whole succession process, and the important values of the shrub layer rank top three in each succession stage. (3) Along the direction of succession, community Margalef abundance index (dMa), Shannon Wiener diversity index (He), Simpson index (D) and the Pielou evenness index (Je) follow down after rising first and then an upward trend, finally community structure tended to be complex, the stability of rising. (4) With the succession going forward, the number of species lost and increased between communities gradually increased, and the species substitution rate gradually increased. The similarity coefficient of species in the whole succession process is expressed as extremely dissimilar between different adjacent stages. The study believes that in the future protection process, protected areas should develop reasonable protection measures to avoid the destruction of human activities, improve community stability, protect community structure and species diversity, and provide scientific support for ecological functions and sustainable development.
keywords:species diversity  succession stage  plant community  natural reserve
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