We broadly seek to understand: 1) how ecosystems function in terms of energy and nutrient flows, and 2) how these functions generate the resources and services people depend on. Our goal is to support conservation and resource management through research, which is rooted in the belief that most effective policies for sustainability are based on sound science. We study both aquatic and terrestrial ecosystems, borrowing methods and ideas from studies of each to inform the other. Specific approaches ranges from using biogeochemical and isotopic tracers to mathematical models of ecosystem processes and human interactions. Similarly, our research spans from site-based empirical studies to regional- and global-scale analysis using synthetic analysis of large datasets.