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My research focuses on how land-cover and climate change affect water movement through soils, weathering, and erosion, and how these, in turn, affect the composition and dispersal of dissolved and solid phases in rivers and trace gases in the atmosphere. Some of my areas of expertise include...

I am interested in the evolution and the ecology of marine organisms, particularly sea urchins, but also fishes, crustaceans, and corals. I focus on the processes that give rise to new species, and I use molecular tools to reconstruct the history of populations and of genes. Typically, this...

During the 1970s and 1980s, I worked in community development, land-tenure and environmental projects with rural and indigenous communities in Panama and Central America. It helped me gain lots of hands-on experience and to work, within the government, towards the creation of Panama’s National...

My lab uses natural history observations, combined with experimental field and laboratory studies, to better understand the evolution of animal behavior in changing environments. Our research focuses primarily on weakly social bees and fungus-growing ants to understand how environmental,...