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…
At the boundary between biological and cultural evolution: The origin of surname distributions
Susanna C. Manrubia, Damian H. Zanette
Surnames and nonrecombining alleles are inherited from a single parent in a highly similar way. A simple birth-death model with mutations can accurately describe this process. Expo…
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…
On the genealogy of a population of biparental individuals
B. Derrida, S. C. Manrubia, D. H. Zanette
If one goes backward in time, the number of ancestors of an individual doubles at each generation. This exponential growth very quickly exceeds the population size, when this size…