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The role of sex separation in neutral speciation

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Abstract

Neutral speciation mechanisms based on isolation by distance and assortative mating, termed topopatric, has recently been shown to describe the observed patterns of abundance distributions and species–area relationships. Previous works have considered this type of process only in the context of hermaphroditic populations. In this work, we extend a hermaphroditic model of topopatric speciation to populations where individuals are explicitly separated into males and females. We show that for a particular carrying capacity, speciation occurs under similar conditions, but the number of species generated is lower than in the hermaphroditic case. As a consequence, the species–area curve has lower exponents, especially at intermediate scales. Evolution results in fewer species having more abundant populations.

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Acknowledgments

We thank Karla Bertrand for helpful comments on the manuscript. This work was supported in part by CNPq and FAPESP.

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Authors and Affiliations

  1. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, São Paulo, 13083-970, Brazil

    Elizabeth M. Baptestini & Marcus A. M. de Aguiar

  2. New England Complex Systems Institute, Cambridge, MA, 02142, USA

    Marcus A. M. de Aguiar & Yaneer Bar-Yam

Authors
  1. Elizabeth M. Baptestini
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  2. Marcus A. M. de Aguiar
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  3. Yaneer Bar-Yam
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Corresponding author

Correspondence to Marcus A. M. de Aguiar.

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Baptestini, E.M., de Aguiar, M.A.M. & Bar-Yam, Y. The role of sex separation in neutral speciation. Theor Ecol 6, 213–223 (2013). https://doi.org/10.1007/s12080-012-0172-2

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