Simple Model of Large Scale Organization in Evolution

Details Simple Model of Large Scale Organization in Evolution Simple Model of Large Scale Organization in Evolution

1996-07-09

arxiv.org/abs/cond-mat/9607066v2

Physics

Condensed Matter

11 pages + 4 Figures. Revised for better explanation. To appear in International Journal of Modern Physics C

Scientific paper

A mathematical model of interacting species filling ecological niches left by the extinction of others is introduced. Species organize themselves into genera of all sizes. The size of a genus on average grows linearly with its age, confirming a general relation between Age and Area proposed by Willis. The ecology exhibits punctuated equilibrium. Analytic and numerical results show that the probability distribution of genera sizes, genera lifetimes, and extinction event sizes are the same power law $P(x) \sim 1/x^2$, consistent with paleontological data.

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