Symsim (sympatric speciation simulation) is a discrete generations model implemented in MatLab, with varying population size, designed to investigate the colonization of a new ecological niche. Each generation consists of resource competition, population growth and recombination in a sympatric pool. Symsim models a microbial population growing in an environment composed of two distinct niches, one ancestral (niche 0) and one derived (niche 1).
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PLoS One. 2013;8(1):e53539. doi: 10.1371/journal.pone.0053539.
Sympatric speciation: when is it possible in bacteria?
Friedman J, Alm EJ, Shapiro BJ.