I have wide-ranging research interests. Much of my work broadly examines how abiotic and biotic factors interact to control the structure and function of ecosystems. I study watershed processes and terrestrial-aquatic linkages, the biogeochemical cycling of carbon and nutrients through ecosystems and food webs, and factors that regulate the metabolic function (i.e., respiration and primary production) of ponds, lakes and estuaries. Many of my current projects seek to understand and predict the effect of climate change and other anthropogenic stressors on aquatic ecosystems from local to global scales.