Emergence of Network Structure in Models of Collective Evolution and – Niels Bohr Institute - University of Copenhagen

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Niels Bohr Institute > Calendar > 2007 > Emergence of Network S...

Emergence of Network Structure in Models of Collective Evolution and

Guest lecture by Henrik Jeldtoft Jensen

The individual-based Tangled Nature model of evolutionary ecology is used to study the relationship between ecosystem structure and evolutionary history. Our evolved model ecosystems typically exhibit interaction networks with exponential degree distributions and an inverse dependence between connectance and species richness. By use of coarse grained models we are able to argue analytically (Self-consitent Mean Field and Fokker-Planck equations) that the degree distribution is controlled by the replication dynamics where as the connectance is determined by selection and adaptation.