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特有综合指数
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Plant endemism is the key problem in floristic study.Analysis of endemism in a flora has significant implications in demonstrating floristic richness and diversity,the relationship between plants and their environment,and also in conserving biodiversity of the flora.In view of the situation that most of the past studies on endemism were qualitative,this study is the first tentative approach to the introduction of quantitative indices to the analysis of floristic endemism,with an purpose to push the study of...

Plant endemism is the key problem in floristic study.Analysis of endemism in a flora has significant implications in demonstrating floristic richness and diversity,the relationship between plants and their environment,and also in conserving biodiversity of the flora.In view of the situation that most of the past studies on endemism were qualitative,this study is the first tentative approach to the introduction of quantitative indices to the analysis of floristic endemism,with an purpose to push the study of endemism from qualitative to quantitative.Four quantitative indices are introduced,i.e. level of endemism(L),coefficient of endemism(C),degree of endemism(D) and general index of endemism(A).Mathematical formulae have been given to each of the above indices and explanations for them have been presented,and the scope of their use in floristic studies has been delimited and exemplified in this paper.The result shows that they are of good applicability.The proposed indices embody full information of plant systematics and plant geography.With the aid of qualitative analysis,the application of the proposed indices will improve the comparability and precision of endemism study in floristics.

过去有关特有现象的研究主要限于定性的分析,可比性和精确性较差该文尝试引入特有现象的定量化指标,以推动特有现象的分析研究从定性水平向定量水平迈进所引入的4种定量化指标分别是:特有水平、特有系数、特有度以及特有综合指数对每种量化指标都给出了数学表达式,说明了其区系学意义,例证和界定了这些指标在植物区系分析中的应用,结果表明,它们有良好的适用性这些指标充分地包含了植物系统学和植物区系学的信息结合定性分析,这些指标的应用将增强植物区系研究的可比性,使植物区系特有现象的分析达到更精确的水平

 
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