265 citations · 3.7k across the 158 of their papers we have counts for
14 papers · 1 filter
Conservation of population size is required for self-organized criticality in evolution models
Yohsuke Murase, Per Arne Rikvold
We study models of biological evolution and investigate a key factor to yield self-organized criticality (SOC). The Bak-Sneppen (BS) model is the most basic model that shows an SOC…
Effects of demographic stochasticity on biological community assembly on evolutionary time scales
Yohsuke Murase, Takashi Shimada, Nobuyasu Ito +1
We study the effects of demographic stochasticity on the long-term dynamics of biological coevolution models of community assembly. The noise is induced in order to check the valid…
Random walk in genome space : A key ingredient of intermittent dynamics of community assembly on evolutionary time scales
Yohsuke Murase, Takashi Shimada, Nobuyasu Ito +1
Community assembly is studied using individual-based multispecies models. The models have stochastic population dynamics with mutation, migration, and extinction of species. Mutant…
Positive interactions and the emergence of community structure in metacommunities
Elise Filotas, Martin Grant, Lael Parrott +1
The significant role of space in maintaining species coexistence and determining community structure and function is well established. However, community ecology studies have mainl…
Degree Correlations in a Dynamically Generated Model Food Web
Per Arne Rikvold
We explore aspects of the community structures generated by a simple predator-prey model of biological coevolution, using large-scale kinetic Monte Carlo simulations. The model acc…
Complex dynamics in coevolution models with ratio-dependent functional response
Per Arne Rikvold
We explore the complex dynamical behavior of two simple predator-prey models of biological coevolution that on the ecological level account for interspecific and intraspecific comp…
Effects of stochastic population fluctuations in two models of biological macroevolution
Yohsuke Murase, Takashi Shimada, Nobuyasu Ito +1
Two mathematical models of macroevolution are studied. These models have population dynamics at the species level, and mutations and extinction of species are also included. The po…
Community-driven dispersal in an individual-based predator-prey model
Elise Filotas, Martin Grant, Lael Parrott +1
We present a spatial, individual-based predator-prey model in which dispersal is dependent on the local community. We determine species suitability to the biotic conditions of thei…
An individual-based predator-prey model for biological coevolution: Fluctuations, stability, and community structure
Per Arne Rikvold, Volkan Sevim
We study an individual-based predator-prey model of biological coevolution, using linear stability analysis and large-scale kinetic Monte Carlo simulations. The model exhibits appr…
Complex Behavior in Simple Models of Biological Coevolution
Per Arne Rikvold
We explore the complex dynamical behavior of simple predator-prey models of biological coevolution that account for interspecific and intraspecific competition for resources, as we…
Self-optimization, community stability, and fluctuations in two individual-based models of biological coevolution
Per Arne Rikvold
We compare and contrast the long-time dynamical properties of two individual-based models of biological coevolution. Selection occurs via multispecies, stochastic population dynami…
Effects of correlated interactions in a biological coevolution model with individual-based dynamics
Volkan Sevim, Per Arne Rikvold
Models of coevolution have recently been studied, in which a species is defined by a genome in the form of a bitstring, and the interactions between species i and j are given by a…
Fluctuations in models of biological macroevolution
Per Arne Rikvold
Fluctuations in diversity and extinction sizes are discussed and compared for two different, individual-based models of biological coevolution. Both models display power-law distri…
A Biological Coevolution Model with Correlated Individual-Based Dynamics
Volkan Sevim, Per Arne Rikvold
We study the effects of interspecific correlations in a biological coevolution model in which organisms are represented by genomes of bitstrings. We present preliminary results for…