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应用生态学报 ›› 2004, Vol. ›› Issue (2): 191-194.

• 研究论文 • 上一篇    下一篇

西藏冷杉原始林林隙对草本植物和灌木树种多样性的影响

边巴多吉1, 郭泉水2, 次柏1, 罗大庆1   

  1. 1. 西藏农牧学院, 林芝, 860000;
    2. 中国林业科学院森林生态环境与保护研究所, 北京, 10091
  • 收稿日期:2002-07-24 修回日期:2003-01-23
  • 通讯作者: 郭泉水
  • 基金资助:
    国家林业局(199802);西藏自治区科委重点资助项目(199903)

Effects of gap in primitive subalpine fir forest on diversity of herb and shrub in Tibet

BIANBA Duoji1, GUO Quanshui2, CI Bai1, LUO Daqing 1   

  1. 1. Tibet Agriculture and Animal Husbandry College, Linzhi 860000, China;
    2. Research Institute of Forest Ecology, Environment and Protection CAF, Beijing 100091, China
  • Received:2002-07-24 Revised:2003-01-23

摘要: 研究了西藏东南部亚高山原始冷杉林林隙对草本植物和灌木树种多样性的影响.结果表明,西藏东南部亚高山原始冷杉林林隙与非林隙林分内草本植物和灌木树种的种类组成、数量、密度和物种多样性均存在较大的差异.由于林隙内光照条件的改善,草本植物和灌木树种更加丰富;林隙内有喜光的草本植物和灌木,也有耐荫性较强的草本植物和灌木,而非林隙林分内仅有耐荫和较耐荫的草本植物和灌木;大部分林隙内的草本植物和灌木树种的物种多样性和均匀度大于非林隙林分;林隙内与非林隙林分的群落相似系数较小,表明林隙与非林隙林分草本植物和灌木群落组成存在差异.林隙大小在174.2~562.2m2之间,群落相似系数与林隙大小无明显关联.林隙促进了草本植物和灌木树种的繁衍,在维持藏东南亚高山原始冷杉林的物种多样性方面起着重要作用.

关键词: 植物, 物种多样性, 林隙, 冷杉林, 西藏

Abstract: Effects of gap in primitive fir forest in southeast Tibet on species diversity of herb and shrub were studied. The results showed that species composition, distribution and diversity in gap were different from those in non-gap. The improvement of illumination and other habitat conditions resulted in richer species of herb and shrub in gap. There were shade-tolerant and photophilic herb species and shrub species in gap, however, only shade-tolerant herb species and shrub species grew in non-gap. Species diversity and evenness in gap were higher than in non-gap. The diminutive similar coefficient between herb and shrub communities showed that certain difference existed between herb and shrub communities in stands of gap and non-gap. The similar coefficients were little correlative between gap area and communities. Gap was important to improve growth of herb and shrub and maintain species diversity of primitive subalpine fir forest in southwest Tibet.

Key words: Plant, Species diversity, Gap, Fir forest, Tibet

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