Nitrogen cycling in the ocean: Perspectives from genomes, remote instrumentation and satellites
Jonathan P. Zehr, Ph.D.
University of California, Santa Cruz
Wednesday, Sept. 8 2004
Pacific Forum – 3:00 p.m.
The limitation of primary productivity in the oceans by the availability of nitrogen has formed the basis of the conceptual model for new and regenerated production, models of carbon flux, and interpretation of remote sensing data. Molecular genetic approaches have provided information on new organisms involved in nitrogen cycling, in particular nitrogen fixation, but also on the modes of inorganic nitrogen metabolism by Synechococcus and Prochlorococcus. Information from genomes and molecular interrogation of the marine environment has provided tools that can be deployed on remote instrumentation to provide biological information coincident with physical chemical data to help elucidate the connections between biology, chemistry and physics in determining carbon fluxes in the ocean.