Marine microorganisms are the chemists of the ocean, continually cycling carbon and other chemicals via the routine biochemical reactions they use to live and grow. MIT-WHOI graduate student Kim Popendorf has been conducting experiments to begin to tease apart the multitude of microbes in the ocean and determine which are performing which chemical reactions. Kim is based at Woods Hole. Her advisor is Ben Van Mooy. Read more in her recent Oceanus article.