| 群落结构特性的分析方法探讨-以高寒草甸和高寒灌丛为例 |
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| 引用本文： | 朱志红,王刚.群落结构特性的分析方法探讨-以高寒草甸和高寒灌丛为例[J].植物生态学报,1996,20(2):184-192. |
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| 作者姓名： | 朱志红 王刚 |
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| 作者单位： | 青海畜牧兽医学院草原系，兰州大学生物系 |
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| 基金项目： | 中国科学院海北高寒草甸生态系统定位站基金 |
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| 摘 要： | 从种—多度关系和物种多样性对高寒草甸和高寒灌丛在不同放牧强度下群落结构特性的分析表明，种在群落中的相对重要性发生了变化，种相对多度的分布模式符合对数正态分布，并随放牧强度的变化显示出有规律的改变；同时，表示群落结构特性的指数(Simpson多样性指数λ、Shannon信息多样性指数H′、McIntosh多样性指数Dmc、均匀性指数E和物种丰富度指数R)值在各放牧强度群落间却未表现出统计学上的显著差异(P>0.05)。这表明在有些情况下单纯对物种多样性等指数值的比较并不一定能准确地反映出群落结构上的变化，同时也证实了West关于多样性指数值保持不变或近似但群落结构可能发生变化的推断。
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| 关 键 词： | 群落结构 种—多度关系 物种多样性 高寒 |
AN APPROACH TO ANALYZING NATURE OF COMMUNITY STRUCTURE: WITH EXAMPLES OF ALPINE MEADOW AND ALPINE BUSHLAND |
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| Zhu Zhi-hong.AN APPROACH TO ANALYZING NATURE OF COMMUNITY STRUCTURE: WITH EXAMPLES OF ALPINE MEADOW AND ALPINE BUSHLAND[J].Acta Phytoecologica Sinica,1996,20(2):184-192. |
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| Authors: | Zhu Zhi-hong |
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| Abstract: | Based on both species-abundance relationship and species diversity, nature of community structure was analyzed under different grazing intensities in alpine meadows and alpine bushlands. The results show that the relative abundance, which accords with the lognormal distribution, demonstrated regular change with growing intensities. Though the community structure changed, the values of indices (e. g. Simpson′s diversity index, λ, shannon′s diversity index H′, McIntosh′s diversity index Dmc evenness index E and species richness R) that are normally used to descibe the nature of communities of different grazing intensities. All above indicate that the changes in community structure can not be explained perfectly by comparing values of species diversity indices only, This result also confirmed the West′s supposition. |
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| Keywords: | Community structure Species-abundance relationship Species diversity Alpine meadow Alpine bushland |
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