SASB Distinguished Career Oration

My research is primarily aimed at understanding the origins, diversification and distributions of organisms, especially plants and insects in Australia. I mostly take a comparative approach and use molecular phylogenies to test hypotheses about ecological and evolutionary processes. Recent and ongoing topics include: understanding how interactions among plants and insects affect the evolutionary radiation of each; teasing apart the effects of extinction and speciation to understand how past climate and environmental change has shaped our biota; and investigating the relative roles of continental drift and long distance dispersal in explaining the current distribution patterns of organisms in the southern hemisphere.