I study the effects of human activities on forest ecosystems, from the direct effects of land-use change to the indirect effects climate change and air pollution. Central research questions include:|- How have direct and indirect human activities affected forest growth and net carbon accumulation?|- What factors control the spatial and temporal patterns of watershed nitrogen retention?|- How do the legacies of past disturbances affect current rates of carbon and nitrogen accumulation?|- How does climate change affect forest ecosystem processes, historically and in the future?

I co-teach Ecosystem Biology and Biogeochemistry from the perspective of comparing and contrasting processes in terrestrial and aquatic ecosystems. I teach sections on ecosystem ecology and global change in the introductory class in Ecology and the Environment. Additional teaching activies include graduate seminars on ecosystem modeling, manuscript preparation, and other topics in biogeochemistry and environmental biocomplexity.