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生态学杂志 ›› 2003, Vol. ›› Issue (6): 1-6.

• 研究报告 •    下一篇

不同经营强度条件下毛竹林植物物种多样性的变化

郑成洋1,2, 何建源2, 罗春茂2, 方燕鸿2   

  1. 1. 北京大学环境学院生态学系, 地表过程分析与模拟教育部重点实验室, 北京, 100871;
    2. 福建武夷山国家级自然保护区管理局, 武夷山, 354300
  • 收稿日期:2003-06-02 修回日期:2003-09-13 出版日期:2003-12-10
  • 基金资助:
    国家林业局中国自然保护区全球环境基金管理项目(GEF)小型科研基金资助(GEFSRG9802)

Changes of species diversity at different cultivation intensities of bamboo(Phyllostachys pubescens)forest

ZHENG Chengyang1,2, HE Jianyuan2, LUO Chunmao2, FANG Yanhong2   

  1. 1. Department of Ecology, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China;
    2. Fujian Wuyishan National Nature Reserve, Wuyishan 354300, China
  • Received:2003-06-02 Revised:2003-09-13 Online:2003-12-10

摘要: 对保护区不同经营强度下的毛竹林的物种组成、a多样性及β多样性进行研究,并与3个天然植被类型进行对比分析.结果表明,毛竹林随着经营强度加大,明显表现纯林化过程,这一过程以丧失大量壳斗科、樟科和松科等乔木树种为代价,乔木层、灌木层和草本层的物种组成发生显著的变化.乔木层物种多样性下降,灌木层和草本层物种多样性上升,灌木和草本物种多样性变化是由于乔木层改变引起的.β多样性反映毛竹林在不同经营强度条件下物种替代速率,从毛竹混交林Ⅱ(c类型,25%≤毛竹<50%)向毛竹混交林Ⅰ(b类型,50%≤毛竹<75%)转变过程中,乔木层Sorenson指数最小,Cody指数最大,说明阔叶或针叶树种在这一过程中大部分已被改造而丧失,对保护区物种多样性保护,在此阶段之前加以控制和保护才更有现实意义.

关键词: 复合污染, 相互作用, 机理

Abstract: Plant community composition and species diversity were described in the different cultivation intensities of bamboo forest in Fujian Wuyishan National Nature Reserve. The data was compared with that of three types of natural vegetation(evergreen broad-leaved forest, coniferous and broad-leaved mixed forest, bamboo and coniferous/broad-leaved mixed forest). The results showed that great composition changes of the tree layer, the shrub layer and the herb layer were observed at different stages of bamboo cultivation, which involved the loss of many species in the tree layer such as Fagaceae, Lauraceae and Pinaceae. Species diversity of the tree layer decreased, while those of the shrub layer and herb layer increased differently along with the purified stages of bamboo cultivation. Species diversities of the shrub layer and herb layer were greatly influenced by the tree layer. β diversity corresponded to the change rate of species along the cultivation intensity gradient of bamboo forest. The lowest value of Sorenson index and the highest value of Cody index of the tree layer were recorded from type Ⅱ of the bamboo mixed forest(c, 25% ≤ bamboo < 50%)to type Ⅰ of the bamboo mixed forest(b, 50% ≤bamboo < 75%). Most of the tree species had lost their distribution during this stage. To this point of view, it is very important for the Reserve to take action to protect the species diversity and control the loss of tree species before the stage of occurrence.

Key words: Combined pollution, Interaction, Mechanism

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