Marine microbes form the base of marine food webs and play critical roles in the ocean’s response to climate change. Yet many unanswered questions remain about what controls the activity of marine microbes. Dr. Erin M. Bertrand’s research will develop new ways to measure and predict microbial activity in the ocean. These new measurements and predictions will improve our understanding of what controls marine microbial activity and how that may change in the future. In particular, this research will help us understand microbial relationships in the ocean, especially those that involve sharing and competing for scarce resources.