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Cited by 464

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Resolving the Paradox of Stasis: Models with Stabilizing Selection Explain Evolutionary Divergence on All Timescales

Estes, Suzanne, Arnold, Stevan J.·2007·The American Naturalist
DOI 10.1086/510633
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Abstract

We tested the ability of six quantitative genetic models to explain the evolution of phenotypic means using an extensive database compiled by Gingerich. Our approach differs from past efforts in that we use explicit models of evolutionary process, with parameters estimated from contemporary populations, to analyze a large sample of divergence data on many different timescales. We show that one quantitative genetic model yields a good fit to data on phenotypic divergence across timescales ranging from a few generations to 10 million generations. The key feature of this model is a fitness optimum that moves within fixed limits. Conversely, a model of neutral evolution, models with a stationary optimum that undergoes Brownian or white noise motion, a model with a moving optimum, and a peak shift model all fail to account for the data on most or all timescales. We discuss our results within the framework of Simpson's concept of adaptive landscapes and zones. Our analysis suggests that the underlying process causing phenotypic stasis is adaptation to an optimum that moves within an adaptive zone with stable boundaries. We discuss the implication of our results for comparative studies and phylogeny inference based on phenotypic characters.

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Metadata

Authors
Estes, S., & Arnold, S. J.
Venue
The American Naturalist
Publisher
University of Chicago Press
Published
2007-02
Volume
169
Issue
2
Pages
227-244
ISSN
  • 0003-0147 (ISSN-L)
  • 1537-5323
DOI
10.1086/510633
OpenAlex
W2120631206
Cited by
464
References
6
FWCI
14.90
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Resolving the Paradox of Stasis: Models with Stabilizing Selection Explain Evolutionary Divergence on All Timescales. https://app.cochat.ai/papers/10.1086/510633
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Estes, S., & Arnold, S. J. (2007). Resolving the Paradox of Stasis: Models with Stabilizing Selection Explain Evolutionary Divergence on All Timescales. The American Naturalist. https://doi.org/10.1086/510633

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