We study the biogeochemical cycles of terrestrial ecosystems. We are particularly interested in understanding interaction of plants, soils and symbiotic microbes, how they give rise to patterns and processes in ecosystems, and how these interactions modulate ecosystem response to global change. Our approaches include manipulative field and lab experiments, analyses of ecosystem properties across landscapes and analyses of long-term data. Recent and ongoing work focuses on how forests recover from disturbances of land-use and climate change, disease and fire. Our study systems span the globe from the tropics to the arctic.