5 papers
Biodiversity in model ecosystems, II: Species assembly and food web structure
Ugo Bastolla, Michael Lässig, Susanna C. Manrubia +1
This is the second of two papers dedicated to the relationship between population models of competition and biodiversity. Here we consider species assembly models where the populat…
Biodiversity in model ecosystems, I: Coexistence conditions for competing species
Ugo Bastolla, Michael Lässig, Susanna C. Manrubia +1
This is the first of two papers where we discuss the limits imposed by competition to the biodiversity of species communities. In this first paper we study the coexistence of compe…
Effects of regulation on a self-organized market
G. Cuniberti, A. Valleriani, J. L. Vega
Adapting a simple biological model, we study the effects of control on the market. Companies are depicted as sites on a lattice and labelled by a fitness parameter (some `company-s…
Diversity patterns from ecological models at dynamical equilibrium
U. Bastolla, M. Laessig, S. Manrubia +1
We study a dynamic model of ecosystems where immigration plays an essential role both in assembling the species community and in mantaining its biodiversity. This framework is part…
Damage-Spreading in Self-Organized Critical Systems
Raffaele Cafiero, Angelo Valleriani, Josè Luis Vega
We study the behavior under perturbations of different versions of Bak-Sneppen (BS) model in 1 + 1 dimension. We focus our attention on the damage-spreading features of the BS mode…