Evolution and stability of altruist strategies in microbial games
Christoph Adami, Jory Schossau, and Arend Hintze
When microbes compete for limited resources, they often engage in chemical warfare using bacterial toxins. This competition can be understood in terms of evolutionary game theory (EGT). We study the predictions of EGT for the bacterial suicide bomber game in terms of the phase portraits of populatio ... [Phys. Rev. E 85, 011914 ] published .
Phase transition in an exactly solvable extinction model
Debarshee Bagchi and P. K. Mohanty
We introduce a model of biological evolution in which species evolve in response to biotic interactions and fluctuating environmental stress. The species may either become extinct or mutate to acquire a new fitness value when the effective stress level is greater than their individual fitness. The m ... [Phys. Rev. E 84, 061921 ] published .
Publisher's Note: Multivariate Moran Process with Lotka-Volterra Phenomenology [Phys. Rev. Lett. 107, 228101 (2011)]
Andrew E. Noble, Alan Hastings, and William F. Fagan
Abstract not available. [Phys. Rev. Lett. 107, 239904 ] published .
Evolutionary and population dynamics: A coupled approach
Jonas Cremer, Anna Melbinger, and Erwin Frey
We study the interplay of population growth and evolutionary dynamics using a stochastic model based on birth and death events. In contrast to the common assumption of an independent population size, evolution can be strongly affected by population dynamics in general. Especially for fast reproducin ... [Phys. Rev. E 84, 051921 ] published .
Multivariate Moran Process with Lotka-Volterra Phenomenology
Andrew E. Noble, Alan Hastings, and William F. Fagan
For a population with any given number of types, we construct a new multivariate Moran process with frequency-dependent selection and establish, analytically, a correspondence to equilibrium Lotka-Volterra phenomenology. This correspondence, on the one hand, allows us to infer the phenomenology of o ... [Phys. Rev. Lett. 107, 228101 ] published .
Publisher's Note: Rendezvous effects in the diffusion process on bipartite metapopulation networks [Phys. Rev. E 84, 041936 (2011)]
Lang Cao, Xun Li, Bing Wang, and Kazuyuki Aihara
Abstract not available. [Phys. Rev. E 84, 059904 ] published .
Statistical genetics and evolution of quantitative traits
Richard A. Neher and Boris I. Shraiman
The distribution and heritability of many traits depends on numerous loci in the genome. In general, the astronomical number of possible genotypes makes the system with large numbers of loci difficult to describe. Multilocus evolution, however, greatly simplifies in the limit of weak selection and f ... [Rev. Mod. Phys. 83, 1283 ] published .
Rendezvous effects in the diffusion process on bipartite metapopulation networks
Lang Cao, Xun Li, Bing Wang, and Kazuyuki Aihara
Epidemic outbreaks have been shown to be closely related to the rendezvous-induced transmission of infection, which is caused by casual contact with infected individuals in public gatherings. To investigate rendezvous effects in the spread of infectious diseases, we propose an epidemic model on meta ... [Phys. Rev. E 84, 041936 ] published .
Ecosystems with Mutually Exclusive Interactions Self-Organize to a State of High Diversity
Joachim Mathiesen, Namiko Mitarai, Kim Sneppen, and Ala Trusina
Ecological systems comprise an astonishing diversity of species that cooperate or compete with each other forming complex mutual dependencies. The minimum requirements to maintain a large species diversity on long time scales are in general unknown. Using lichen communities as an example, we propose ... [Phys. Rev. Lett. 107, 188101 ] published .
Adaptive Walks and Extreme Value Theory
Johannes Neidhart and Joachim Krug
We study biological evolution in a high-dimensional genotype space in the regime of rare mutations and strong selection. The population performs an uphill walk which terminates at local fitness maxima. Assigning fitness randomly to genotypes, we show that the mean walk length is logarithmic in the n ... [Phys. Rev. Lett. 107, 178102 ] published .
Short-time evolution in the adaptive immune system
Nicholas Guttenberg, S. M. Ali Tabei, and Aaron R. Dinner
We exploit a simple model to numerically and analytically investigate the effect of enforcing a time constraint for achieving a system-wide goal during an evolutionary dynamics. This situation is relevant to finding antibody specificities in the adaptive immune response as well as to artificial situ ... [Phys. Rev. E 84, 031932 ] published .
Challenges for complexity measures: A perspective from social dynamics and collective social computation
Jessica C. Flack and David C. Krakauer
We review an empirically grounded approach to studying the emergence of collective properties from individual interactions in social dynamics. When individual decision-making rules, strategies, can be extracted from the time-series data, these can be used to construct adaptive social circuits. Socia ... [Chaos 21, 037108 (2011)] published Fri Sep 30, 2011.
Ecological oscillations induced by a shared predator and the Winner peaks first rule
Pia Cordsen, Simone Pigolotti, and Mogens H. Jensen
We investigate the dynamics of an ecological system made up of one predator feeding on two different prey species. In a large range of parameter space, the system displays oscillating solutions. We show that, in the regime in which the two preys coexist, the better fit prey consistently peaks first. ... [Phys. Rev. E 84, 031915 ] published .
Preface of the Symposium Theory and Applications of Evolutionary Algorithms
Jesus Antonio and Hernandez Riveros
Abstract not available. [AIP Conf. Proc. 1389, 1390 (2011)] published Wed Sep 14, 2011.
Effects of Demographic Noise on the Synchronization of a Metapopulation in a Fluctuating Environment
Yi Ming Lai, Jay Newby, and Paul C. Bressloff
We use the theory of noise-induced phase synchronization to analyze the effects of demographic noise on the synchronization of a metapopulation of predator-prey systems within a fluctuating environment (Moran effect). Treating each local predator-prey population as a stochastic urn model, we derive ... [Phys. Rev. Lett. 107, 118102 ] published .
Moran model as a dynamical process on networks and its implications for neutral speciation
Marcus A. M. de Aguiar and Yaneer Bar-Yam
In population genetics, the Moran model describes the neutral evolution of a biallelic gene in a population of haploid individuals subjected to mutations. We show in this paper that this model can be mapped into an influence dynamical process on networks subjected to external influences. The panmict ... [Phys. Rev. E 84, 031901 ] published .
Theory of cooperation in a micro-organismal snowdrift game
Zhenyu Wang and Nigel Goldenfeld
We present a mean-field model for the phase diagram of a community of micro-organisms, interacting through their metabolism so that they are, in effect, engaging in a cooperative social game. We show that as a function of the concentration of the nutrients glucose and histidine, the community underg ... [Phys. Rev. E 84, 020902 ] published .
Competition and Cooperation in One-Dimensional Stepping-Stone Models
K. S. Korolev and David R. Nelson
Mutualism is a major force driving evolution and sustaining ecosystems. Although the importance of spatial degrees of freedom and number fluctuations is well known, their effects on mutualism are not fully understood. With range expansions of microbes in mind, we show that, even when mutualism confe ... [Phys. Rev. Lett. 107, 088103 ] published .
Criticality and Transmission of Information in a Swarm of Cooperative Units
Fabio Vanni, Mirko Lukovic, and Paolo Grigolini
We show that the intelligence of a swarm of cooperative units (birds) emerges at criticality, as an effect of the joint action of frequent organizational collapses and of spatial correlation as extended as the flock size. The organizational collapses make the birds become independent of one another, ... [Phys. Rev. Lett. 107, 078103 ] published .
Effects of competition on pattern formation in the rock-paper-scissors game
Luo-Luo Jiang, Tao Zhou, Matjaz Perc, and Bing-Hong Wang
We investigate the impact of cyclic competition on pattern formation in the rock-paper-scissors game. By separately considering random and prepared initial conditions, we observe a critical influence of the competition rate p on the stability of spiral waves and on the emergence of biodiversity. In ... [Phys. Rev. E 84, 021912 ] published .
Accumulation of beneficial mutations in one dimension
Jakub Otwinowski and Stefan Boettcher
When beneficial mutations are relatively common, competition between multiple unfixed mutations can reduce the rate of fixation in well-mixed asexual populations. We introduce a one-dimensional model with a steady accumulation of beneficial mutations. We find a transition between periodic selection ... [Phys. Rev. E 84, 011925 ] published .
Scaling Behavior of Threshold Epidemics. (arXiv:1202.1853v1 [q-bio.PE])
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