Impact of network structure on a model of diffusion and competitive interaction

Details Impact of network structure on a model of diffusion and competitive interaction Impact of network structure on a model of diffusion and competitive interaction

2010-06-22

arxiv.org/abs/1006.4257v2

EPL 94, 68009 (2011)

Physics

Physics and Society

6 pages, 4 figures

Scientific paper

10.1209/0295-5075/94/68009

We consider a model in which agents of different species move over a complex network, are subject to reproduction and compete for resources. The complementary roles of competition and diffusion produce a variety of fixed points, whose stability depends on the structure of the underlying complex network. The survival and death of species is influenced by the network degree distribution, clustering, degree-degree correlations and community structures. We found that the invasion of all the nodes by just one species is possible only in Erdos-Renyi and regular graphs, while networks with scale--free degree distribution, as those observed in real social, biological and technological systems, guarantee the co-existence of different species and therefore help enhancing species diversity.

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