On Sexual Selection in the Presence of Multiple Costly Displays

Bohm, Clifford; Ackles, Acacia L.; Ofria, Charles; Hintze, Arend

doi:10.1162/isal_a_00170

Cited by 3 publications

(5 citation statements)

References 12 publications

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“…Future research is warranted on all these effects. The addition of sexual selection may have drastic effects when integrated into adaptive momentum theory as any shift in preference may result in adaptive momentum until a newly preferred trait becomes common 55 .…”

Section: Effect Of Constraints On the Fitness Landscapes And Future D...mentioning

confidence: 99%

“…In reality, organisms have a multitude of traits that interact to produce their overall fitness. Future research should explore multi-trait fitness functions 55 , where multiple adaptive directions exist at every point in time. Rather than modeling a onedimensional fitness landscape with peaks and valley, we could model a more complex landscape involving peaks and valleys in independent dimensions and combine those values into an overall fitness with or without epistasis between traits.…”

Section: Effect Of Constraints On the Fitness Landscapes And Future D...mentioning

confidence: 99%

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Reduced selection during sweeps lead to adaptive momentum on rugged landscapes

Bohm,

Ragusa,

Ofria

et al. 2024

Preprint

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Evolutionary theory seeks to explain the remarkable diversity and adaptability of life on Earth. Current theory offers substantial explanatory power, but it overlooks important transient dynamics that are prominent only when populations are outside equilibrium, such as during selective sweeps. We identify a dynamic that we call “adaptive momentum” whereby lineages with a selective advantage can temporarily sustain more deleterious mutations. This reduction in the strength of purifying selection allows populations to explore fitness valleys that are usually too costly to enter, potentially leading to the discovery of otherwise inaccessible fitness peaks. Using mathematical and agent-based simulations, we demonstrate adaptive momentum and show how periods of disequilibrium become windows of enhanced adaptation. Genetic exploration can occur during these windows without requiring mechanisms such as changing environments or complex landscapes. Adaptive momentum provides a simple potential explanation for bursts of rapid evolution observed in nature, including in pathogens such as SARS-CoV-2 and cancers. (152 words)

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Section: Effect Of Constraints On the Fitness Landscapes And Future D...mentioning

confidence: 99%

Section: Effect Of Constraints On the Fitness Landscapes And Future D...mentioning

confidence: 99%

Reduced selection during sweeps lead to adaptive momentum on rugged landscapes

Bohm,

Ragusa,

Ofria

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

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“…MABE seeks to provide the best of both worlds by simultaneously being friendly to new users, facilitating testing hypotheses in multiple configurations, and promoting better software development practices. Thus, far, the only ecological research that has been published with MABE is focused on sexual selection (Bohm et al, 2019a), but the system allows multiple populations that can interact in any way that the user specifies. Because of its flexibility, however, MABE could be used to address any number of ecological questions.…”

Section: Mabementioning

confidence: 99%

“…Thus, much of ecological theory could benefit from being tested in a system that relaxes these assumptions, such as digital evolution. Indeed, much of the work reviewed in this paper stemmed from efforts to do exactly that, often yielding interesting and counter-intuitive discoveries in the process (Bohm et al, 2019a;Vostinar and Ofria, 2019).…”

Section: Robustness Of Ecological Theorymentioning

confidence: 99%

Digital Evolution for Ecology Research: A Review

Dolson

Ofria

2021

Front. Ecol. Evol.

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In digital evolution, populations of computational organisms evolve via the same principles that govern natural selection in nature. These platforms have been used to great effect as a controlled system in which to conduct evolutionary experiments and develop novel evolutionary theory. In addition to their complex evolutionary dynamics, many digital evolution systems also produce rich ecological communities. As a result, digital evolution is also a powerful tool for research on eco-evolutionary dynamics. Here, we review the research to date in which digital evolution platforms have been used to address eco-evolutionary (and in some cases purely ecological) questions. This work has spanned a wide range of topics, including competition, facilitation, parasitism, predation, and macroecological scaling laws. We argue for the value of further ecological research in digital evolution systems and present some particularly promising directions for further research.

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“…ECA simplifies the underlying selective processes by avoiding these three characteristics of IBMs , and thus focuses the analysis on the adaptive and evolutionary balances of biological interactions, which constitutes the main objective of this work. Other models have added features such as multiple types of CPUs to form the bodies of digital organisms, as in some of the EcoSim [ 36 , 37 ], Avida [ 38 , 39 , 40 ], or COMETS [ 41 ] models. However, ECA uses the average of the individual traits of a species as a definition of a population of digital organisms.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Coevolution of Digital Organisms with an Evolutionary Cellular Automaton

Falgueras-Cano

Moya

2021

Biology

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This paper presents an Evolutionary Cellular Automaton (ECA) that simulates the evolutionary dynamics of biological interactions by manipulating strategies of dispersion and associations between digital organisms. The parameterization of the different types of interaction and distribution strategies using configuration files generates easily interpretable results. In that respect, ECA is an effective instrument for measuring the effects of relative adaptive advantages and a good resource for studying natural selection. Although ECA works effectively in obtaining the expected results from most well-known biological interactions, some unexpected effects were observed. For example, organisms uniformly distributed in fragmented habitats do not favor eusociality, and mutualism evolved from parasitism simply by varying phenotypic flexibility. Finally, we have verified that natural selection represents a cost for the emergence of sex by destabilizing the stable evolutionary strategy of the 1:1 sex ratio after generating randomly different distributions in each generation.

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On Sexual Selection in the Presence of Multiple Costly Displays

Cited by 3 publications

References 12 publications

Reduced selection during sweeps lead to adaptive momentum on rugged landscapes

Reduced selection during sweeps lead to adaptive momentum on rugged landscapes

Digital Evolution for Ecology Research: A Review

A Study of the Coevolution of Digital Organisms with an Evolutionary Cellular Automaton

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