Dave Hutchins’ research interests concern marine phytoplankton biology and nutrient and carbon cycling. In general, these projects often involve first building hypotheses based on experimental work with algal cultures in the laboratory. These hypotheses are then tested in experiments with natural communities of plankton onboard research vessels at sea. His recent and current projects include extensive investigations into the role of iron and other trace metals as biologically limiting nutrients in the ocean, and factors that affect the establishment of destructive blooms of harmful and toxic algae. New projects in regions like the Bering Sea, the North Atlantic, and the seas around Antarctica are examining the impacts of anthropogenic global change (e.g. rising CO2, acidity and temperature) on the structure and diversity of phytoplankton communities, and on the ocean nutrient cycling pathways and food webs that they support. Another ongoing project is examining the implications of increasing atmospheric CO2 for nitrogen-fixing organisms in the tropical and subtropical oceans. This new work is at the forefront of increasingly urgent efforts among the international oceanography community to understand the consequences of human fossil fuel emissions for ocean biology and chemistry, and in turn predict the potential feedbacks from these changing ocean processes to atmospheric CO2 and global climate.
