Biological Oceanography studies the processes affecting the abundance, activity, and diversity of life in the oceans, which includes some of the smallest organisms such as bacteria, phytoplankton, and zooplankton. These organisms collectively drive the productivity of the oceans globally through their use and transformation of elements such as carbon and nitrogen. We work to unravel the biological, physical, and chemical factors controlling population growth, ultimately leading to a predictive framework for when and where different marine organisms will thrive. These processes and the interactions among organisms are studied using field observations, laboratory experiments, remote sensing, and computer modeling