Research


        Most of my research has dealt with four broad areas:

  1. 1)the factors leading to the evolution of new species, 

  2. 2)the effects of sexual selection on phenotypic and genetic diversity,

  3. 3)the maintenance, loss, and evolution of polymorphism, and

  4. 4)the genetic basis of adaptive phenotypes in wild populations.


In general, I have worked to link microevolutionary selective processes observed within species to macroevolutionary patterns of diversification.  The majority of my research has been done on lizards, particularly on a species that exhibits substantial phenotypic diversity within and among populations.  However, I have done research projects on birds and amphibians. The links below provide more details about my research projects.


Speciation

        The role of polymorphism in speciation

        The buildup of reproductive isolation between divergent populations


Sexual selection

        The genomic signature of sexual selection

        The evolution of sexual dimorphism


Polymorphism

        The maintenance of polymorphism


Genetics of Polymorphism

        The genetic basis of polymorphic mating systems


Other Research

        Fitness and evolution of sociality in the lizard

Xantusia vigilis

        Adaptive divergence of Lacertid lizards

       Conservation studies on Anacapa Island

           Sampling strategies for species trees