MEB Faculty

Sergio Sanudo-Wilhelmy

Professor of Biological Sciences and Earth Sciences

Contact Information
Phone: (213) 821-1302
Office: AHF 206



  • B.S. Oceanography, Universidad Autonoma de Baja California-Ensenada, 1983
  • M.S. Marine Sciences, University of California Santa Cruz, 1989
  • Ph.D. Earth Sciences, University of California Santa Cruz, 1993

  • Academic Appointment, Affiliation, and Employment History

    • Professor, University of Southern California, 08/01/2006-  
    • Associate Professor, Marine Sciences Research Center-Stony Brook University, 08/01/2000-08/01/2006  
    • Assistant Professor, Marine Sciences Research Center-Stony Brook University, 08/01/1993-08/01/2000  

    Description of Research

    Summary Statement of Research Interests
    The general focus of my research group is environmental biogeochemistry. We are trying to elucidate how bioactive substances influence specific biological processes (e.g., carbon and nitrogen fixation) as well as phytoplankton dynamics (species composition and abundance) in different aquatic systems. To accomplish those research objectives, we study the cycling (e.g., sources, transport, fate, bioavailability) of various trace metals, B-vitamins and mineral nutrients in ecosystems. Another objective of my research group is to establish the impact of anthropogenic processes on environmental quality. We try to apply our results to environmental policy analysis, including issues related to public health.
    Research Specialties
    Trace metals, organic carbon and nitrogen cycling in aquatic systems Cycling of vitamins in aquatic systems Impact of phytoplankton blooms on metal geochemistry Impact of trace metals and nutrients on nitrogen fixation Impact of colloids on metals and organic carbon cycling in coastal environments Impact of groundwater seepage on coastal waters Isotope geochemistry (stable lead isotopes as tracers of anthropogenic sources)

    Affiliations with Research Centers, Labs, and Other Institutions

    • Wrigley Institute for Environmental Studies,


    Journal Article
    • Sanudo-Wilhelmy, S. A. (2006). A phosphate alternative. Nature. Vol. 439, pp. 25-26.
    • Sanudo-Wilhelmy, S. A., Gobler, C. J., Taylor, G. T., Okbamichael, M. (2006). Regulation of phytoplankton dynamics by vitamin B12. Geophysical Research Letters/American Geophysical Union. Vol. 33, pp. L04604, doi.
    • Sanudo-Wilhelmy, S. A., Tovar-Sanchez, A., Fu, F., Capone, D. G., Carpenter, E. J., Hutchins, D. A. (2004). The Impact of Surface-Adsorbed Phosphorus on Phytoplankton Redfield Stoichiometry. Nature. Vol. 432, pp. 897-900.
    • Sanudo-Wilhelmy, S. A., Kustka, A., Gobler, C. J., Hutchins, D. A., Capone, D. G., Raven, J. A., DiGiacomo, P. M. (2001). Phosphorus limitation of nitrogen fixation by Trichodesmium in the central Atlantic Ocean. Nature. Vol. 411, pp. 66-69.
    • Roditi, H. A., Fisher, N. S., Sanudo-Wilhelmy, S. A. (2000). Uptake of dissolved organic carbon and trace elements by Zebra Mussels. Nature. Vol. 407, pp. 78-80.

  • Department of Biological Sciences
  • University of Southern California
  • Allan Hancock Foundation Building
  • Los Angeles, CA 90089-0371