My research focuses on the population genetics and evolutionary biology of organisms living in variable environments using a combination of mathematical modeling, field work and DNA sequence analysis. In particular, I am interested in the population genetics of dependent organisms (parasites and commensal organisms), many of which experience changing selective and demographic processes when transmitting between hosts. Some current projects are focusing on the following topics:
population genetics, biogeography and ecology of myrmecophilous and soil mites in the southwestern US;
population genetics of the honeypot ant Myrmecocystus mendax (with Ti Eriksson and Juergan Gadau);
molecular epidemiology of malaria parasites (with Ananias Escalante);
genealogical signatures of host switches;
evolution of antigen gene repertoires.