TESTING FOR DIFFERENT RATES OF CONTINUOUS TRAIT EVOLUTION USING LIKELIHOOD

Brian C. O'Meara; Cécile Ané; Michael J. Sanderson; Peter C. Wainwright

doi:10.1554/05-130.1

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Brian C. O'Meara,¹ Cécile Ané,² Michael J. Sanderson,^3,4 Peter C. Wainwright^3,5

¹Center for Population Biology, University of California, Davis, One Shields Avenue, Davis, California 95616 bcomeara@ucdavis.edu
²Department of Statistics, University of Wisconsin-Madison, Medical Science Center, 1300 University Avenue, Madison, Wisconsin 53706-1532 ane@stat.wisc.edu
³Section of Evolution and Ecology, University of California, Davis, One Shields Avenue, Davis, California 95616
⁴mjsanderson@ucdavis.edu
⁵pcwainwright@ucdavis.edu

Abstract

Rates of phenotypic evolution have changed throughout the history of life, producing variation in levels of morphological, functional, and ecological diversity among groups. Testing for the presence of these rate shifts is a key component of evaluating hypotheses about what causes them. In this paper, general predictions regarding changes in phenotypic diversity as a function of evolutionary history and rates are developed, and tests are derived to evaluate rate changes. Simulations show that these tests are more powerful than existing tests using standardized contrasts. The new approaches are distributed in an application called Brownie and in r8s.

Citation Download Citation

Brian C. O'Meara, Cécile Ané, Michael J. Sanderson, and Peter C. Wainwright "TESTING FOR DIFFERENT RATES OF CONTINUOUS TRAIT EVOLUTION USING LIKELIHOOD," Evolution 60(5), 922-933, (1 May 2006). https://doi.org/10.1554/05-130.1

Received: 8 March 2005; Accepted: 4 March 2006; Published: 1 May 2006