Flying snakes are perhaps the world’s most unconventional gliders, turning their body into a wing by changing shape and undulating in the air. In this talk, I’ll discuss our experimental and theoretical efforts to understand the biomechanical features that underly this unique form of flight. Some of these specializations, such as jumping to cross gaps, also appear in sister taxa, suggesting that some aspects of their glide system were evolutionarily co-opted.

Many eukaryotes, pathogenic and free-living alike, encyst during their life cycle. How these various organisms sense their environment to determine when and where to differentiate is largely unknown. Our recent work on the intestinal parasite Giardia lamblia has demonstrated that intestinal bile and elevated pH deplete cholesterol rich lipid rafts from the parasite plasma membrane which upregulates cyclic adenosine monophosphate (cAMP) production and initiates encystation. I will present our recent work on the regulation of encystation in Giardia.

The study of systematics integrates diverse fields of biology including taxonomy, computational biology, genomics, and natural history collections. My research uses these approaches to address fundamental questions about the evolution of tropical plants. In this seminar, I will discuss two major research areas: (1) What processes govern the generation and distribution of tropical biodiversity and (2) are seemingly convergent morphologies produced through similar anatomical and molecular modifications and do they perform similar functions?