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Related Experiment Videos

Ecological Pleiotropy Suppresses the Dynamic Feedback Generated by a Rapidly Changing Trait.

John P DeLong

    The American Naturalist
    |April 15, 2017
    PubMed
    Summary

    Eco-evolutionary dynamics are influenced by how traits affect species interactions. Ecological pleiotropy can suppress population dynamics shifts, even with significant trait changes, by altering multiple ecological processes.

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    Area of Science:

    • Ecology
    • Evolutionary Biology
    • Population Dynamics

    Background:

    • Population dynamics can reflect eco-evolutionary dynamics when traits change.
    • Theory predicts that traits strongly linked to species interactions should influence population dynamics.
    • A previous study showed predator cell volume changes in the Didinium-Paramecium system without affecting population dynamics, creating a theory-data conflict.

    Purpose of the Study:

    • To resolve the conflict between theory and data regarding trait evolution and population dynamics.
    • To investigate the role of ecological pleiotropy in mediating eco-evolutionary dynamics.

    Main Methods:

    • Analysis of the Didinium-Paramecium predator-prey system.
    • Examination of the links between predator cell volume and species interactions.
    Keywords:
    body sizeeco-evolutionary dynamicsecological pleiotropypredator-prey interactions

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  • Investigation of how ecological pleiotropy affects the relationship between trait evolution and population dynamics.

    • Main Results:

    • Ecological pleiotropy was identified as a mechanism suppressing shifts in population dynamics.
    • Despite rapid and large changes in predator cell volume, population dynamics remained unaffected.
    • The net effect of a trait on different aspects of species interactions determines the emergence of eco-evolutionary dynamics.

    Conclusions:

    • Eco-evolutionary dynamics are not solely dependent on the ecology-evolution feedback.
    • Ecological pleiotropy can mask or alter the expected influence of trait evolution on population dynamics.
    • Understanding the multifaceted effects of traits on ecological processes is crucial for predicting eco-evolutionary dynamics.