Research in the Bloom Lab focuses on how the interplay between evolutionary and ecological dynamics influences patterns of biological diversity. Why do some lineages have so many species and some so few? Why are some lineages morphologically diverse, and others rather uniform? Why do some biogeographic areas have more species than others? How do ecological shifts influence these disparate diversity patterns? We address these questions using phylogenetic and comparative approaches and draw from diverse fields such as molecular systematics, macroevolution, biogeography, and evolutionary ecology.