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Related Experiment Videos

Remarks on branching-extinction evolutionary cycles.

Fabio Dercole1

  • 1CIRITA, Politecnico di Milano, Via Ponzio 34/5, 20133 Milano, Italy. fabio.dercole@polimi.it

Journal of Mathematical Biology
|November 18, 2003
PubMed
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Cannibalistic populations can evolve through cycles of splitting and extinction. This study reveals branching-extinction evolutionary cycles in consumer populations, crucial for understanding evolutionary dynamics.

Area of Science:

  • Evolutionary Biology
  • Ecology
  • Theoretical Biology

Background:

  • Cannibalism is a significant ecological interaction influencing population dynamics.
  • Understanding the evolutionary trajectories of populations with cannibalistic traits is complex.

Purpose of the Study:

  • To investigate the evolutionary dynamics of cannibalistic consumer populations.
  • To identify and characterize cyclical evolutionary patterns, specifically branching-extinction cycles.

Main Methods:

  • Utilized a deterministic model based on the adaptive dynamics approach.
  • Employed numerical bifurcation analysis on both ecological (resident-mutant) and evolutionary models.

Main Results:

  • Demonstrated that monomorphic populations can evolve to high cannibalism levels, reaching a branching point.

Related Experiment Videos

  • Observed population splitting into two sub-populations with distinct cannibalistic traits, followed by coevolution and extinction of the more cannibalistic group.
  • Showcased the cyclical nature of evolution, with populations returning to the branching point after extinction events.

    • Conclusions:

    • Branching-extinction evolutionary cycles are a potential feature in diverse environmental and demographic conditions.
    • The detection of these cycles is vital for a comprehensive study of evolutionary dynamics.
    • Cannibalism can drive complex, non-linear evolutionary trajectories in consumer populations.