Nitrogen is a key element in the ocean since it is one of the most common growth limiting nutrient for phytoplankton. The microbially-mediated nitrogen cycle controls the distribution, speciation, and availability of nitrogen in the ocean. Nitrogen availability often limits primary production, and its complex cycle includes the production of the greenhouse gas nitrous oxide. Our lab uses a variety of field, laboratory, and modeling techniques to study nitrogen cycling, scaling from benchtop to regional and global scales. In particular, we specialize in the application of stable isotope techniques to track the influence of different processes on the cycling of nitrate, nitrite, and nitrous oxide.
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