A Model of Speciation Preconditions in Terms of Percolation and Self-Organized Criticality Theoriesстатья
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Аннотация:Several models have been considered: those that describe mutation fixation in asexually or sexuallyreproducing species during speciation and are based on stochastic processes and a percolation selection latticefor mutation selection through generations and a trigger model of mutation fixation in a population cluster,which are based on both stochastic and deterministic processes. Lower (reversible processes) and upper (irreversibleprocesses) thresholds were shown to be characteristic of mutation fixation through a percolationselection lattice. An unstable state that is caused by the cooperative effects of interactions between mutantindividuals was found to evolve into a qualitatively new stable state; i.e., a new species arises or the populationbecomes extinct, depending on whether the mutations are advantageous or harmful.