Advances in Earth Science ›› 2021, Vol. 36 ›› Issue (6): 625-631. doi: 10.11867/j.issn.1001-8166.2021.063

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Verification and Discussion on Fractal Model and the General Pattern on Species Abundance in Community

Junfeng GAO( ),Qiang SU( )   

  1. College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100043,China
  • Received:2021-03-25 Revised:2021-05-30 Online:2021-06-10 Published:2021-07-22
  • Contact: Qiang SU E-mail:gaojunfeng20@mails.ucas.ac.cn;sqiang@ucas.ac.cn
  • About author:GAO Junfeng (1997-), male, Nanyang City, Henan Province, Master student. Research areas include biodiversity. E-mail: gaojunfeng20@mails.ucas.ac.cn
  • Supported by:
    the National Natural Science Foundation of China "Testing the entropy hypothesis of the determinant of community diversity according to the diversity and biogeography of phytoplankton communities"(4207011731);"Analyzing fractal theory model of species abundance distribution in phytoplankton communities"(41676113)

Junfeng GAO,Qiang SU. Verification and Discussion on Fractal Model and the General Pattern on Species Abundance in Community[J]. Advances in Earth Science, 2021, 36(6): 625-631.

The analysis of individual quantitative relationship among community species, also known as the Species Abundance Distribution (SAD), is considered to be the key to understanding what determines species diversity. In recent years, numerous SAD models have been proposed on various theoretical grounds, but it is difficult to draw general conclusions about which models provide the best fit to SADs. Previous studies have shown that the screening of SAD model should not only examine the goodness of fit of SAD model with the empirical data of community samples, but also evaluate model's ability to simultaneously explain some macro ecological patterns. The fractal model proposed by Su has good fit to the empirical data of community samples and reveals the general pattern of SAD; that is, Nr / N1 tends to be 1∶1/2∶1/3… (Nr/N1, Nr and N1 represent the number of individuals of the r-th and the first species in descending order). However, the model has not been given enough attention, and the relevant verification research is also lacking. This paper uses a global community species database to test the model and the general pattern of SAD. The results show that: the fractal model has a good fit to the database; the general pattern of SAD can be supported by the database. These results might provide a more reliable scientific basis for understanding SAD and exploring the determinant mechanism of species diversity.

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