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Convergence to a novel environment: comparative method versus experimental evolution.

Margarida Matos1, Pedro Simões, Ana Duarte

  • 1Centro de Biologia Ambiental, Departamento de Biologia Animal, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal. mmatos@fc.ul.pt

Evolution; International Journal of Organic Evolution
|September 3, 2004
PubMed
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Comparative and temporal studies of experimental evolution in Drosophila subobscura populations reveal similar evolutionary dynamics for fecundity. However, comparative methods may be less informative for complex traits like starvation resistance.

Area of Science:

  • Evolutionary biology
  • Population genetics

Background:

  • Laboratory adaptation enables contrasting temporal and comparative evolutionary studies.
  • Comparative studies infer microevolutionary processes by comparing contemporaneous populations of diverse origins.
  • This study utilizes Drosophila subobscura populations introduced to the lab at different times and locations.

Purpose of the Study:

  • To assess the accuracy of inferring evolutionary dynamics from simultaneous comparative data.
  • To compare evolutionary dynamics inferred from comparative data with those from temporal experimental evolution studies.
  • To evaluate the utility of comparative versus temporal approaches in evolutionary research.

Main Methods:

  • Utilizing Drosophila subobscura populations from distinct origins and introduction times.

Related Experiment Videos

  • Applying comparative analysis to contemporaneous populations.
  • Conducting temporal studies of experimental evolution.
  • Contrasting inferred evolutionary dynamics between the two approaches.

    • Main Results:

    • Comparative data accurately inferred evolutionary dynamics for most characters.
    • Starvation resistance dynamics were an exception, showing discrepancies.
    • Evolutionary dynamics for fecundity characters were similar between comparative and temporal studies.
    • Comparative studies can be uninformative for characters with complex evolutionary trajectories.

    Conclusions:

    • Both comparative and temporal studies are valuable tools in evolutionary research.
    • Comparative approaches are effective for inferring evolutionary dynamics when trajectories are not overly complex.
    • Temporal studies remain crucial for understanding complex evolutionary changes.