Tempo and mode of evolution in the tangled nature model

  • Jones D
  • Jensen H
  • Sibani P
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Abstract

We study the Tangled Nature model of macro evolution and demo nstrate that the co-evolutionary dynamics produces an increasingly correlated core of well o ccupied types. At the same time the entire configuration of types becomes increasing de-correl ated. This finding is related to ecosystem evolution. The systems level dynamics of the model is subord inated to intermittent transitions between meta-stable states. We improve on previous studies of the statistics of the transition times and show that the fluctuations in the offspring probability de creases with number of transitions. The longtime adaptation, as seen by an increasing populatio n size is demonstrated to be related to the convexity of the offspring probability. We explain how the models behaviour is a mathematical reflection of Darwin’s concept of adaptation of profitable variations

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Authors

  • Paolo SibaniUniversity of Southern Denmark Institute of History and Civilization

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  • Dominic Jones

  • Henrik Jeldtoft Jensen

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