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Darwinian evolution does not rule out the gaia hypothesis.

Takeshi Sugimoto1

  • 1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Silver Street, UK. take@ie.kanagawa-u.ac.jp

Journal of Theoretical Biology
|October 18, 2002
PubMed
Summary

Darwinian Daisyworlds demonstrate how species adapt to regulate planetary temperature, supporting the Gaia hypothesis. Mathematical solutions reveal that adaptation enhances, rather than hinders, temperature regulation, confirming the coexistence of Darwinian evolution and the Gaia hypothesis.

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Area of Science:

  • Planetary Science
  • Theoretical Ecology
  • Astrobiology

Background:

  • The Gaia hypothesis proposes that Earth's biosphere self-regulates its climate.
  • Daisyworld models illustrate how competing species can regulate global temperature.
  • Darwinian Daisyworlds explore adaptive species' impact on planetary temperature regulation.

Purpose of the Study:

  • To rigorously investigate Darwinian Daisyworld models mathematically.
  • To resolve conflicting findings regarding adaptive daisies' temperature regulation.
  • To determine the compatibility of Darwinian evolution with the Gaia hypothesis.

Main Methods:

  • Development of exact, closed-form mathematical solutions for two Darwinian Daisyworld models.
  • Analysis of adaptive and non-adaptive daisy species' temperature regulation capabilities.

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  • Comparison of simulation-based findings with new analytical results.

    • Main Results:

    • Contrary to previous studies, adaptive daisies regulate global temperature effectively.
    • Specific constraints on adaptation were found to limit regulatory ability.
    • Weak adaptability can lead to evolutionary dead ends for species.
    • Robertson and Robinson's adaptive daisies regulate temperature longer than non-adaptive ones.

    Conclusions:

    • The Gaia hypothesis and Darwinian evolution are compatible.
    • Mathematical analysis provides definitive insights into Daisyworld dynamics.
    • Adaptive evolution, under certain conditions, enhances planetary temperature regulation.