John Harte investigates the effects of human actions on, and the linkages among, biogeochemical processes, ecosystem structure and function, biodiversity, and climate. His work spans a a range of scales from plot to landscape to global, and involves field investigations, mathematical modeling, and theory development. A long-term climate manipulation experiment in a meadow in the Colorado Rockies and the development and testing of a comprehensive theory of macroecology are among his ongoing projects. He also conducts policy studies that draw out the societal implications of scientific findings. He is a UC Berkeley Professor of the Graduate School and previously held a joint professorship in the Energy and Resources Group and the Ecosystem Sciences Division of the College of Natural Resources.