We study the biogeochemical cycles of terrestrial ecosystems. We seek to uncover the mechanisms of how ecosystems function in order to answer pressing ecological questions. We are particularly interested in understanding how the interaction of plants, soils and symbiotic microbes 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 that examine the response of plants, microbes and ecosystems, analyses of ecosystem properties across landscapes and analyses of long-term data. Recent and ongoing work focus 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.