Evolutionary and Population Dynamics: A Coupled Approach

Abstract

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 reproducing microbes which are subject to selection, both types of dynamics are often closely intertwined. We illustrate this by considering different growth scenarios. Depending on whether microbes die or stop to reproduce (dormancy), qualitatively different behaviors emerge. For cooperating bacteria, a permanent increase of costly cooperation can occur. Even if not permanent, cooperation can still increase transiently due to demographic fluctuations. We validate our analysis via stochastic simulations and analytic calculations. In particular, we derive a condition for an increase in the level of cooperation.

12 pages, 5 figures

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Cited by in corpus (26)

• Growth dynamics and the evolution of cooperation in microbial populations
• Master equations and the theory of stochastic path integrals
• The Impact of Environmental Fluctuations on Evolutionary Fitness Functions
• Evolution of a Fluctuating Population in a Randomly Switching Environment
• Steering Eco-Evolutionary Games Dynamics with Manifold Control
• Population Dynamics in a Changing Environment: Random versus Periodic Switching
• Eco-Evolutionary Dynamics of a Population with Randomly Switching Carrying Capacity
• Interactions mediated by a public good transiently increase cooperativity in growing Pseudomonas putida metapopulations
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• Mobility, fitness collection, and the breakdown of cooperation
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• Eco-evolutionary Model of Rapid Phenotypic Diversification in Species-Rich Communities
• Extinction dynamics from meta-stable coexistences in an evolutionary game
• Coupled environmental and demographic fluctuations shape the evolution of cooperative antimicrobial resistance
• Non-selective evolution of growing populations
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• Effects of population growth on the success of invading mutants
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