James Pierson

I am a biological oceanographer that focuses on zooplankton ecology and the interactions between zooplankton, their predators and prey, and their habitat. My first love and main research focus are copepods, tiny crustacean zooplankton that are probably the most numerous organism on earth. Their role in the food web is to graze on phytoplankton and small protists, and they provide food for fish, shellfish, and jellyfish. To gain a better understanding of how copepods affect the ecology of marine and coastal ecosystems, I combine field work, laboratory experiments, and numerical modeling to test specific hypotheses about copepod feeding, vertical migration, and response to stressors like toxins, deoxygenation, and climate change.

My students have worked on a variety of projects, including winter blooms of mixotrophic protists; the effect of deoxygenation on trophic interactions between zoolankton, fish, and jellyfish; the trophic dynamics of bioluminescent algae; metagenomic analysis of zooplankton from field samples and in fish guts; and drivers of bioluminescence in tropical lagoons.

In addition I am committed to broadening participation in geosciences, and in ocean science in particular. I am fortunate to work with a great team of colleagues from UMCES, Maryland Sea Grant, and Universidad Interamericana in Puerto Rico on the NSF funded Centro TORTUGA project, which is now part of the SEAS Islands Alliance.