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Related Experiment Video

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Competition for resources can reshape the evolutionary properties of spatial structure.

Anush Devadhasan1, Oren Kolodny2, Oana Carja1

  • 1Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America.

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Ecological competition alters how network structure affects evolution. Resource competition can reverse the roles of networks in suppressing or amplifying harmful mutations, impacting tumor growth dynamics.

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Area of Science:

  • Evolutionary biology
  • Ecological modeling
  • Network theory

Background:

  • Evolving ecosystems often exhibit spatial structures representable as networks.
  • Existing evolutionary network models overlook ecological niche differences and eco-evolutionary feedback.

Purpose of the Study:

  • To investigate how heterogeneous network topology influences evolutionary dynamics.
  • To integrate resource competition into evolutionary graph theory for studying eco-evolutionary interplay.

Main Methods:

  • Combining a resource competition model with evolutionary graph theory.
  • Analyzing global frequency-dependent ecological interactions.
  • Utilizing simulations and analytical approximations.

Main Results:

  • Ecological competition can reverse the roles of networks (amplifier vs. suppressor) for deleterious mutants.
  • This effect is a nonlinear function of ecological niche overlap.
  • Network topology in spatially constrained tumors (ductal carcinoma) may increase deleterious mutant hitchhiking.

Conclusions:

  • Heterogeneous network structures significantly shape evolutionary dynamics when ecological competition is considered.
  • The interplay between ecology and evolution is crucial for understanding adaptation and disease progression.
  • Spatial constraints in tumor microenvironments can influence the evolutionary trajectory of cancer cells.