Speciational view of macroevolution: Are micro and macroevolution decoupled?V. Schwämmle1, 2 and E. Brigatti3
1 Instituto de Física, Universidade Federal Fluminense Campus da Praia Vermelha, 24210-340, Niterói, RJ, Brazil
2 Institute for Computer Physics, University of Stuttgart Pfaffenwaldring 27, D-70569 Stuttgart, Germany
3 Centro Brasileiro de Pesquisas Físicas - Rua Dr. Xavier Sigaud 150 22290-180, Rio de Janeiro, RJ, Brazil
received 22 February 2006; accepted in final form 23 May 2006
published online 14 June 2006
We introduce a simple computational model that, with microscopic dynamics driven by natural selection and mutation alone, allows the description of true speciation events. A statistical analysis of the evolutionary tree so generated captures realistic features showing power laws for frequency distributions in time and size. Finally, some possible interpretations of the absence of punctuated dynamics with mass extinctions are worked out.
87.23.-n - Ecology and evolution.
87.10.+e - General theory and mathematical aspects.
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