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Metabolic network dynamics in open chaotic flow.

Gyorgy Karolyi1, Istvan Scheuring, Tamas Czaran

  • 1Program in Applied Mathematics, University of Arizona, 617 North Santa Rita, Tucson, Arizona 85721Department of Structural Mechanics, Budapest University of Technology and Economics, Muegyetem rkp. 3, H-1521 Budapest, Hungary.

Chaos (Woodbury, N.Y.)
|June 5, 2003
PubMed
Summary

Metabolically coupled replicators can coexist in chaotic fluid flows, defying mean-field predictions. System stability depends on metabolic neighborhood size and kinetic parameters, with parasites persisting but not dominating.

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Area of Science:

  • Origin of life studies
  • Theoretical biology
  • Chemical kinetics

Background:

  • Metabolically coupled replicators are essential for understanding the origins of life.
  • Previous models, like the mean-field approximation, suggested limited coexistence possibilities.
  • Chaotic fluid dynamics present a unique environment for studying replicator interactions.

Purpose of the Study:

  • To analyze the dynamics of metabolically coupled replicators in open chaotic flows.
  • To investigate the conditions enabling replicator coexistence in such systems.
  • To understand the impact of parasite replicators on a coexisting metabolic system.

Main Methods:

  • Numerical simulations on a rectangular grid representing flow and biological processes.

Related Experiment Videos

  • Modeling of metabolic coupling where replicators produce monomers for each other.
  • Analysis of replication occurring within a finite metabolic neighborhood distance.

    • Main Results:

    • Replicator coexistence is possible in chaotic flows, contrary to mean-field approximations.
    • Coexistence is primarily influenced by metabolic neighborhood size, kinetic parameters, and the number of coupled replicators.
    • Parasite replicators can persist within the system but do not destroy the coexisting metabolic replicators.

    Conclusions:

    • Chaotic fluid dynamics and finite metabolic neighborhoods facilitate replicator coexistence.
    • The interplay between metabolic coupling and fluid dynamics is crucial for maintaining biodiversity in early life scenarios.
    • Parasite dynamics are complex, showing persistence without system collapse.