I am a microbial ecologist who studies how microorganisms interact with biogeochemical cycles. Microbially-mediated transformations of elements are integral to aquatic ecosystem function, yet little is known about the controls on microbial activity. My research interests focus on the activities and energetics of microbial metabolism in aquatic environments, especially those that are energy-limited. I am also interested in microbial ecosystem-level responses to change, both within the context of seasonal cycles (e.g. lake ice-on and ice-off) and incremental and acute changes related to land-use or climate change.