2003/12/31 by Francois Coppex, François Coppex, Michel Droz +1 · 4 citations
Biochemistry, Genetics and Molecular Biology · Environmental Science · Physics and Astronomy · Social Sciences · #Ecosystem dynamics and resilience #Evolution and Genetic Dynamics #Evolutionary Game Theory and Cooperation #cond-mat.stat-mech #q-bio.PE
paper · pdf · doi:10.1103/physreve.69.061901
published as Phys. Rev. E 69, 061901 (2004) · 8 pages, 6 eps figures included
openalex publication_date 2004/06/01 · arxiv created 2004/06/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study a model of a multispecies ecosystem described by Lotka-Volterra-like equations. Interactions among species form a network whose evolution is determined by the dynamics of the model. Numerical simulations show power-law distribution of intervals between extinctions, but only for ecosystems with sufficient variability of species and with networks of connectivity above certain threshold that is very close to the percolation threshold of the network. The effect of slow environmental changes on extinction dynamics, degree distribution of the network of interspecies interactions, and some emergent properties of our model are also examined.