Evolutionary ecology in-silico:evolving foodwebs, migrating population and speciation

Abstract

We have generalized our ``unified'' model of evolutionary ecology by taking into account the possible movements of the organisms from one ``patch'' to another within the same eco-system. We model the spatial extension of the eco-system (i.e., the geography) by a square lattice where each site corresponds to a distinct ``patch''. A self-organizing hierarchical food web describes the prey-predator relations in the eco-system. The same species at different patches have identical food habits but differ from each other in their reproductive characteristic features. By carrying out computer simulations up to $10^9$ time steps, we found that, depending on the values of the set of parameters, the distribution of the lifetimes of the species can be either exponential or a combination of power laws. Some of the other features of our ``unified'' model turn out to be robust against migration of the organisms.

12 pages of PS file, including LATEX text and 9 EPS figures

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Cited by in corpus (7)

• The species-area relationship and evolution
• Self-organized patterns of coexistence out of a predator-prey cellular automaton
• Stable oscillations of a predator-prey probabilistic cellular automaton: a mean-field approach
• The risk of extinction - the mutational meltdown or the overpopulation
• Simulation of geographical trends in Chowdhury ecosystem model
• Habitat width along a latitudinal gradient
• Simulation of Rapoport's rule for latitudinal species spread