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Bulletin of Botanical Research ›› 2009, Vol. 29 ›› Issue (1): 103-107.doi: 10.7525/j.issn.1673-5102.2009.01.021

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Similar Distribution Patterns Between Genus Size of Spermatophyte Flora and Species Abundance

GAO Bang-Quan;ZHANG Guang-Fu;CHEN Rui-Bing   

  1. 1.Department of Environmental Sciences,East China Normal University,Shanghai 200062 2.College of Life Sciences,Nanjing Normal University,Nanjing 210046 3.Nanjng Institute of Environmental Sciences,Nanjing 210042
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-01-20 Published:2009-01-20
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Abstract: Genus size analysis is an important component in floristic research. The distribution pattern of genus size can reflect taxonomic diversity and phylogenetic diversity of a certain flora to some extent. In floristic studies, we cannot perform meta-analysis with mean genus size for its dependence on flora size. We applied logseries model to fit genus size distribution patterns of 8 spermatophyte floras in China, and achieved good fitting result. The goodness of fit R2>0.99, indicating similar patterns between genus size distribution and species abundance distribution. Rarefaction analysis and correlation analysis showed that, mean genus size is not significantly correlated with its original values before rarefaction when the sampling size is small, while α index from the logseries model is stably correlated with its original values. Moreover, α index is significantly correlated with mean genus size for all sampling size, thus it could be taken as a stable index to describe the flora richness.

Key words: spermatophyte flora, genus size, distribution pattern, logseries model, rarefaction analysis

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