Education

• B.S., University of Miami, Coral Gables, FL
• Ph.D., University of Maryland, Horn Point Laboratory

Research Interests

I am interested in the fluxes of nitrogen in open-ocean, coastal, and estuarine environments with emphasis on the role of dissolved organic nitrogen (DON) in microbial food webs. My early work involved extensive method development with the goal of quantifying in situ rates of DON release and uptake using 15N tracer techniques. I now use these techniques to address a host of questions relating to the release of DON from phytoplankton and zooplankton and subsequent reincorporation of DON as a nitrogen source for phytoplankton and bacteria. More recently I have investigated photochemical processes as a mechanism that facilitates the uptake of organic nitrogen by both phytoplankton and bacteria. I continue to be intrigued by methods development, and I have most recently been working on linking flow cytometry with 15N-tracer techniques to quantify nitrogen flow into autotrophs versus heterotrophs in open-ocean systems.

Awards and Honors

• 2011-present  Treasurer, Council of Scientific Society Presidents
• 2010  Member-at-large, Council of Scientific Society Presidents
• 2009  Dean's Prize for the Advancement of Women in Science, VIMS.
• 2009-2011  Member, U.S. National Committee for the Intergovernmental Oceanographic Commission (IOC), UNESCO.
• 2008-2010  Member, U.S. Carbon Cycle Science Plan Working Group.
• 2008-2014  President, American Society of Limnology and Oceanography.  Two years each as president elect, president, and past-president.
• 2006-2009  Member, Ocean Carbon and Biogeochemistry (OCB) Scientific Steering Committee assembled by NSF, NOAA, and NASA.
• 2005  Krispy Kreme Award recipient. Award was given in recognition of effective use of a doughnut metaphor as applied to DON availability at the Significant Processes, Observations, and Transformation in Oceanic Nitrogen (SPOT ON) workshop, Warnemunde Germany ; )
• 199. Lindeman Award recipient. Award is given annually by the American Society of Limnology and Oceanography for the outstanding paper in aquatic sciences by a young scientist.
• 1995 Recipient of the Antarctic Service Medal.
• 1993 Selected for participation at the Dissertations Symposium on Chemical Oceanography (DISCO) meeting in March 1993, Honolulu, Hawaii

Current Projects

• Determining rates of group-specific phytoplankton and bacteria uptake of inorganic and organic nitrogen by means of stable isotope techniques.  Funded by NSF-BO.  2010-2013.  Bronk part $377,744.  Boris Wawrik (PI, U. Oklahoma) and Bronk (Co-PI).
• Does competition for nitrogen between autotrophs and heterotrophs control carbon fluxes in the western coastal Arctic?  Funded by NSF-OPP.  2009-2012. Bronk part $390,827.  Tish Yager (PI, UGA), Marc Frischer (Co-PI, SkIO), and Bronk (Co-PI).
• Bioavailability of effluent organic nitrogen in Virginia coastal waters. Funded by Virginia Sea Grant.  2009-2011.  Bronk part $130,000.  Bronk (PI) and Margie Mulholland (ODU)
• Chemical characterization of EON as it passes through a wastewater treatment plant.  Funded by the Hampton Roads Sanitation District. 2010-2011. $65,000. Rachel Sipler (PI) and Bronk (Co-PI).
• Combining flow cytometry and stable isotope techniques: A method to measure phytoplankton- and bacteria specific nitrogen uptake.  Funded by NSF-Biological Oceanography.  2008-2011.  Bronk part $232,237.  Bronk (PI, VIMS) and Mike Lomas (Co-PI, BIOS).
• Karenia nutrient dynamics in the Eastern Gulf of Mexico. Funded by EPA ECOHAB. 2006-2011. Bronk part $499,823. Cindy Heil (PI, FFWCC), Debbie Bronk (Co-PI VIMS), Margie Mulholland (Co-PI, ODU), and Judy O'Neil (Co-PI, UMd).

Past Projects

• Assessing the bioavailability of effluent organic nitrogen along a freshwater continuum.  Funded by NSF-CBET.  2008-2010.  Bronk part $194,353.  Bronk (PI, VIMS), Margie Mulholland (Co-PI, ODU), Liz Canuel (Co-PI, VIMS), Nancy Love (Co-PI, UMichigan), and Pat Hatcher (Co-PI, ODU).
• C-43 Water Quality Treatment Project.  Consulting for CH2MHill Engineering and the South Florida Water Management District.  2009. $65,550.  Bronk (PI)
• Biodiesel production from algae.  Funded by the Virginia Coastal Energy Research Consortium (VCERC).  Bronk part $25,657, $22,937, and $13,557 for 2007, 2008, and 2009.  Pat Hatcher (PI, ODU), Liz Canuel (Co-PI, VIMS), and others.
• Nitrogen Preferences and Uptake Kinetics in Cultures and Field Populations of the Florida Red Tide Dinoflagellate Karenia brevis. Funded by Florida Fish and Wildlife Conservation Commission.  2005-2006. Bronk, PI. $25,000.
• The Ecology and Genomics of CO2 Fixation in Oceanic River Plumes. Funded by DOE. 2005-2008.  Bronk part $117,039.  John Paul (PI, USF), Debbie Bronk (Co-PI, VIMS), and others.
• Molecular approaches for in situ study of nitrate utilization by marine bacteria. Funded by DOE. 2003-2006. Bronk part $186,160.  Marc Frischer (PI, SkIO), Peter Verity (Co-PI, SkIO), Debbie Bronk (Co-PI, VIMS), and others. 
• Quantification and modeling of DOC and DON release in marine systems: a study of increasing trophic complexity. Funded by NSF-Biocomplexity. 2002 to 2007. $1,699,000. Debbie Bronk (PI, VIMS), Walker Smith (Co-PI, VIMS), Debbie Steinberg (Co-PI, VIMS), Dave Malmquist (Co-PI, VIMS), Eric Wommack (Co-PI, University of Delaware), Craig Carlson (Co-PI, University of California at Santa Barbara), Raleigh Hood (Co-PI, University of Maryland, Horn Point Laboratory), and Dan Repeta (Co-PI, Woods Hole Oceanographic Institution).
• Geochemical Rate/RNA Integration Study (GRIST): A Pilot Field Experiment for Inter-Calibration of Biogeochemical Flux and Nucleic Acid Measurements. Funded by DOE. 2002-2003. ~$400,000. Lee Kerkhoff (PI, Rutgers), Debbie Bronk (PI, VIMS), and others.
• Fate of recently fixed nitrogen in the eastern Gulf of Mexico: Does the regeneration of nitrogen fixed by Trichodesmium support the growth development of G. breve blooms? Funded by NSF-Biological Oceanography. 2001-2004. ~$700,000. Cindy Heil (PI, University of South Florida), Debbie Bronk (Co-PI, VIMS), and Margie Mulholland (Co-PI, Old Dominion University)
• Molecular approaches for in situ study of nitrate utilization by marine bacteria. Funded by DOE. 2000-2003. Mark Frischer (PI, SkIO), Peter Verity (Co-PI, SkIO), Melissa Booth (Co-PI,SkIO), Deborah Bronk (Co-PI, VIMS) and Matt Gilligan (Co-PI, SSU).  
• Coastal eutrophication in the southeastern U.S.: Nitrogen versus phosphorus limitation and the role of organic nitrogen Funded by Georgia Sea Grant. Completed 3/02. Deborah A. Bronk (PI, UGA/VIMS)
• Coastal eutrophication: Organic versus inorganic nitrogen as a source of coastal productivity. Funded by Georgia Sea Grant.  Debbie Bronk (PI, UGA)
• Molecular approaches for in situ identification of nitrate utilization by marine bacteria and phytoplankton. Funded by DOE.  Mark Frischer (PI, SkIO), Peter Verity (Co-PI, SkIO), Melissa Booth (Co-PI,SkIO), Debbie Bronk (Co-PI, VIMS) and Matt Gilligan (Co-PI, SSU).
• New and regenerated production in the Southern Ocean: Ross Sea studies (U.S. JGOFS). Funded by NSF - Office of Polar Programs. Bill Cochlan (PI, SFSU) and Debbie Bronk (Co-PI, UGA)
• Inputs and fates of organic nitrogen in two land-margin ecosystems: Chesapeake Bay and Georgia coastal rivers.  Funded by NSF, Biological Oceanography and Environmental Geochemistry and Biogeochemistry.  PatGlibert (PI, UMd) and Debbie Bronk (Co-PI, UGA).

Publications (note papers may appear in more than one section)

DON Release and Nutrient Regeneration

• Condon, R. H., D. K. Steinberg, P. A. del Giorgio, T. C. Bourvier, H. Ducklow, and D. A. Bronk.  Submitted. The ‘jelly carbon pump’: Jellyfish blooms result in a major microbial respiratory sink of carbon in marine systems. Proceedings of the National Academy of Science.
• Saba, G., D. K. Steinberg, D. A. Bronk, and A. R. Place. In press. The effects of harmful algal species and food concentration on zooplankton grazer production of dissolved organic matter and inorganic nutrients. Harmful Algae.
• Condon, R. H., D. K. Steinberg, D. A. Bronk.  2010. Production of dissolved organic matter and inorganic nutrients by gelatinous zooplankton in the York River estuary, Chesapeake Bay. J. Plankton Res. 32 (2): 153-170.
• Saba, G. K., D. K. Steinberg, and D. A. Bronk. 2009. Effects of diet on release of dissolved organic and inorganic nutrients by the copepod Acartia tonsa. Marine Ecology Progress Series 386:147-161.
• Bronk, D. A. and D. Steinberg.  2008.  Nitrogen regeneration.  In: Nitrogen in the Marine Environment. Capone, D. G., Bronk, D. A., Mulholland, M. and Carpenter, E. (eds).  Elsevier Press.  pg. 385-468.
• Bronk, D. A. and B. B. Ward.  2005.  Inorganic and organic nitrogen cycling in the Southern California Bight. Deep Sea Research I.  52:  2285-2300.
• Mulholland, M. R., C. A. Heil, D. A. Bronk, J. M. O'Neil and P. Bernhardt.  2004.  Does nitrogen regeneration from the N2 fixing cyanobacteria Trichodesmium spp. fuel Karenia brevis blooms in the Gulf of Mexico?  In: Steidinger, K. A., J. H. Landsberg, C. R. Tomas and G. A. Vargo (Eds.), Harmful Algae 2002.  Florida Fish and Wildlife Conservation Commission, Florida Institute of Oceanography and Intergovernmental Oceanographic Commission of UNESCO, St. Petersberg, Florida, USA. pp. 47-49. (peer-reviewed book).
• Berman, T. and D. A. Bronk. 2003.  Dissolved Organic Nitrogen: a dynamic participant in aquatic ecosystems.  Aquatic Microbial Ecology.  31: 273-305. 
• Bronk, D. A. 2002.  Dynamics of dissolved organic nitrogen.  In Biogeochemistry of Marine Dissolved Organic Matter.  Eds.  Hansell, D. A. and Carlson, C. A.  pg. 153-247.
• Ward, B. B. and D. A. Bronk.  2001.  Net nitrogen uptake and DON release in surface waters: importance of trophic interactions implied from size fractionation experiments.  Marine Ecology Progress Series. 219: 11-24.
• Bronk, D. A. and B. B. Ward.  2000.  Magnitude of DON release relative to gross nitrogen uptake in marine systems. Limnology and Oceanography. 45: 1879-1883.
• Bronk, D. A. and B. B. Ward.  1999.  Gross and net nitrogen uptake and DON release in the euphotic zone of Monterey Bay, California. Limnology and Oceanography.  44: 573-585.
• Bronk, D. A. 1999.  Rates of NH4+ uptake, intracellular transformation and dissolved organic nitrogen release in two clones of marine Synechococcus spp. Journal Plankton Research. 21: 1337-1353.
• Bronk, D. A., P. M. Glibert, T. C. Malone, E. Sahlstenand and S. Banahan.  1998.  Inorganic and organic nitrogen cycling in Chesapeake Bay: autotrophic versus heterotrophic processes and relationships to carbon flux.  Aquatic Microbial Ecology. 15: 177-189.
• Bronk, D. A. and P. M. Glibert.  1994.  The fate of the missing 15N differs among marine systems. Limnology and Oceanography. 39: 189-194.
• Bronk, D. A. , P. M. Glibert and B. B. Ward.  1994.  Nitrogen uptake, dissolved organic nitrogen release and new production. Science. 265: 1843-1846.
• Bronk, D. A. and P. M. Glibert.  1993.  Application of a 15N tracer method to the study of dissolved organic nitrogen uptake during spring and summer in Chesapeake Bay. Marine Biology. 115: 501-508.
• Bronk, D. A. and P. M. Glibert.  1993.  Contrasting patterns of dissolved organic nitrogen release by two size fractions of estuarine plankton during a period of rapid NH4+ consumption and NO2- production. Marine Ecology Progress Series. 96: 291-299.
• Bronk, D. A. and P. M. Glibert.  1991.  A 15N tracer method for the measurement of dissolved organic nitrogen release by phytoplankton. Marine Ecology Progress Series. 77: 171-182.

Inorganic and Organic Nitrogen Uptake

• Wawrik, B., A. V. Callaghan, D. A. Bronk. 2009. Inorganic and organic nitrogen use by Synechococcus and diatoms on the West Florida Shelf measured using stable isotope probing. Applied Environmental Microbiology. 75: 6662-6670.

• Love, N.G., M. R. Mulholland, and D. A. Bronk  In press. Nutrients and their Effect on the Environment. In: Chemical and Biological Nutrient Removal.
• Sipler, R. E., S. P. Seitzinger, R.J. Lauck, L. M. McGuinness, G. J. Kirkpatrick, D. A. Bronk. C. A. Heil, L. J. Kerkhof, and O. M. Schofield.  Submitted. Relationship between dissolved organic matter, bacterial community composition and rapid growth of toxic red-tide Karenia brevis.  Marine Ecology Progress Series.
• Bradley, P. B., M. Lomas, and D. A. Bronk. 2010. Inorganic and organic nitrogen use by phytoplankton along Chesapeake Bay measured using a flow cytometric approach. Estuaries and Coasts. 33: 971-984.
• Bradley, P. B., M. P. Sanderson, J. C. Nejstgaard, A. F. Sazhin, M. E. Frischer, L. M. Killberg-Thoreson, P. G. Verity, L. Campbell, and D. A. Bronk.  2010. Nitrogen uptake by phytoplankton and bacteria during an induced Phaeocystis pouchetii bloom, measured using size fractionation and flow cytometric sorting approaches. Aquatic Microbial Ecology. 61: 89-104.
• Bradley, P. B., M. E. Frischer, J. Brofft, M. P. Sanderson, M. G. Booth, L. J. Kerkhof, and D. A. Bronk. 2010. Influence of summer stratification on phytoplankton and bacterial nitrogen uptake in a Mid-Atlantic Bight upwelling region. Estuarine, Coastal and Shelf Science. 88: 429-441.
• Sanderson, M. P., D. A. Bronk, J. C. Nejstagaard, A. F. Sazhin, P. G.Verity and M. E. Frischer. 2008.  Inorganic and organic nitrogen uptake during a Phaeocystis bloom in a Norwegian Fjord: A mesocosm study.  Aquatic Microbial Ecology.  51:  153-168.
• Bronk, D. A., J. H. See, P. Bradley, and L. Killberg.  2007.  DON as a source of bioavailable nitrogen for phytoplankton.  Biogeosciences. 4: 283-296.
• See, J. H, D. A. Bronk and A. Lewitus.  2006. Uptake of Spartina-derived humic nitrogen by estuarine phytoplankton. Limnology and Oceanography.
• Wiegner, T. N., S. P. Seitzinger, P. Glibert, and D. A. Bronk.  2006.  Influence of watershed land use on riverine dissolved organic matter composition and bioavailablility.  Aquatic Microbial Ecology.  43:  277-287.
• Nejstgaard, J. C., M. E. Fischer, P. G. Verity, J. T. Anderson, A. Jacobsen, M. J. Zirbel, A. Lersen, J. Martinez, A. F. Sazhin, T. Walters, S. J. Whipple, S. Borett, B. C. Patten, J. D. Long, D. A. Bronk.  2006.  Temporal patters in planktonic food web development in mesocosms with added nutrients and Phaeocystis.  Aquatic Microbial Ecology.
• Bronk, D. A. and K. J. Flynn.  2006.  Algal cultures as a tool to study the cycling of dissolved organic nitrogen.  In: Algal Cultures, Analogues of Blooms and Applications. Ed. S. R. V Durvasula. pp. 301-341.
• Wawrick, B. J., H. Paul, D. A. Bronk, D. John and M. Gray.  2004.  Preferential uptake of ammonium in the presence of elevated nitrate concentrations by phytoplankton in the offshore Mississippi plume. Aquatic Microbial Ecology. 35: 175-184.
• Bronk, D. A., M. P. Sanderson, M. R. Mulholland, C. A. Heil and J. M. O'Neil.  2004.  Organic and inorganic nitrogen uptake kinetics in field populations dominated by Karenia brevis.  In: Steidinger, K. A., J. H. Landsberg, C. R. Tomas and G. A. Vargo (Eds.), Harmful Algae 2002.  Florida Fish and Wildlife Conservation Commission, Florida Institute of Oceanography and Intergovernmental Oceanographic Commission of UNESCO, St. Petersberg, Florida, USA. pp. 80-82. (peer-reviewed book)
• Cochlan, W. P. and D. A. Bronk. 2003.  Effects of ammonium on nitrate utilization in the Ross Sea, Antarctica: Implications for f-ratio estimates.  In: Biogeochemistry of the Ross Sea.  DiTullio, G. R. and Dunbar, R. B. (eds). Antarctic Research Series.  78: 159-178.
• Berman, T. and D. A. Bronk.  2003.  Dissolved Organic Nitrogen: a dynamic participant in aquatic ecosystems.  Aquatic Microbial Ecology.  31: 273-305.
• Bronk, D. A. 2002.  Dynamics of dissolved organic nitrogen.  In Biogeochemistry of Marine Dissolved Organic Matter.  Eds.  Hansell, D. A. and Carlson, C. A.  pg. 153-247.
• Lomas, M. W., T. M. Trice, P. M. Glibert, D. A. Bronk, J. J. McCarthy.  2002.  Temporal and spatial dynamics of urea concentrations in Chesapeake Bay:  Biological versus physical forcing.  Estuaries.  25: 469-482.
• Allen, A.E., M. H. Howard-Jones, M. G. Booth, M. E. Frischer, P. G. Verity, D. A. Bronk, M. P. Sanderson.  2002.  Importance of heterotrophic bacterial assimilation of ammonium and nitrate in the Barents Sea during summer. Journal Marine Science. 38: 93-108.
• Cochlan, W. P., D. A. Bronk and K. H. Coale.  2002.  Trace metals and nitrogenous nutrition of Antarctic phytoplankton: experimental observations in the Ross Sea.  Deep-Sea Research. 49: 3365-3390.
• Cochlan, W. P. and D. A. Bronk. 2001.  Nitrogen uptake kinetics in the Ross Sea, Antarctica.  Deep-Sea Research II. 48: 4127-4153.

Nitrogen Cycle

• Voß, Maren, D. A. Bronk, B. Deutsch, R. Purvaja, R. Ramesh, T. Rixen, R. Sipler, and N. Wannicke. In press. Internal cycling of nitrogen and nitrogen transformations. In: Treatise on estuarine and coastal science.
• Love, N.G., M. R. Mulholland, and D. A. Bronk. In press. Nutrients and their Effect on the Environment. In: Chemical and Biological Nutrient Removal.
• Capone, D. G., D. A. Bronk,  M. R. Mulholland, and E. J. Carpenter (eds).  2008.  Nitrogen in the Marine Environment.  2nd edition.  Elsevier, Amsterdam.  pp. 1729.

Linking Nitrogen with Carbon and Phosphorus Cycling

• John, D. E., Z.A. Wang, X. Liu, R.H. Byrne, J.E. Corredor, J.M. López, A. Cabrera, D. A. Bronk, R. F. Tabita, and J.H. Paul.  2007.  Carbon fixation gene (RuBisCO) transcripts and CO2 flux in the Mississippi River plume. International Society of Microbial Ecology Journal.1: 517-531.
• Hoch, M. P. and D. A. Bronk.  2007.  Relative availability of nitrogen, phosphorus, and carbon to bacterioplankton in the Eastern Tropical North Pacific assessed by an enzymatic approach.  J. Env. Mar. Biol. Ecol. 349: 390-404.
• Nejstgaard, J. C., M. E. Fischer, P. G. Verity, J. T. Anderson, A. Jacobsen, M. J. Zirbel, A. Lersen, J. Martinez, A. F. Sazhin, T. Walters, S. J. Whipple, S. Borett, B. C. Patten, J. D. Long, D. A. Bronk.  2006.  Temporal patters in planktonic food web development in mesocosms with added nutrients and Phaeocystis.  Aquatic Microbial Ecology.
• Bronk, D. A., D. A., P. M. Glibert, T. C. Malone, E. Sahlstenand and S. Banahan.  1998.  Inorganic and organic nitrogen cycling in Chesapeake Bay: autotrophic versus heterotrophic processes and relationships to carbon flux.  Aquatic Microbial Ecology. 15: 177-189.

Effluent Organic Nitrogen

• Mesfioiui, R., P. G. Hatcher, M. R. Mulholland, D. A. Bronk, E. A. Canuel, and N. G. Love. In preparation. Bioavailability and chemical characterization of effluent organic nitrogen in freshwaters determined from Fourier transform ion cyclotron mass spectrometry (FT-ICR-MS).

• Love, N.G., M. R. Mulholland, and D. A. Bronk. In press. Nutrients and their Effect on the Environment. In: Chemical and Biological Nutrient Removal.

• Filippino, K.C., M. R. Mulholland, P. W. Bernhardt, G. E. Boniello, R. E. Morse, M. Semcheski, H. Marshall, N. G. Love, Q. Roberts, and D. A. Bronk. 2010. The bioavailability of effluent-derived organic nitrogen along an estuarine salinity gradient. Estuaries and Coasts. On line first - not sure if publication year will be 2010 or 2011.
• Bronk, D. A., Q. Roberts, N. Love, E. Canuel, P. Hatcher, R. Mesfioui, K. C. Filippino, and M. R. Mulholland. 2010.  Effluent organic nitrogen (EON): Bioavailability and photochemical and salinity-mediated release. Environmental Science and Technology. 44:  5830-5835.
• Mulholland, M. R., N. G. Love, D. A. Bronk, V. M. Pramanik, and H. D. Stensel.  2008.  Establishing a research agenda for assessing the bioavailability of wastewater treatment plant-derived effluent organic nitrogen in treatment systems and receiving waters.  WERF, STAC publication (not peer-reviewed).
• Mulholland, M. R., N. G. Love, V. M. Pattarkine, D. A. Bronk, and E. Canuel.  200y.  Bioavailability of organic nitrogen from treated wastewater. STAC publication 07-001 (not peer-reviewed).

Nitrogen fixation

• Mulholland, M.R., P. W. Bernhardt, C. A. Heil, D. A. Bronk and J. M. O’Neil.  2006.  Nitrogen fixation and release of fixed nitrogen in the Gulf of Mexico. Limnology and Oceanography.  51 (4): 1762-1776.
• Mulholland, M., D. A. Bronk and D. G. Capone.  2004.  Dinitrogen fixation and release of ammonium and dissolved organic nitrogen by Trichodesmium IMS101.  Aquatic Microbial Ecology. 37: 85-94.
• Glibert, P.M. and D. A. Bronk. 1994.  Release of dissolved organic nitrogen by marine diazotrophic cyanobacteria, Trichodesmium spp.  Applied Environmental Microbiology. 60: 3996-4000.

Harmful Algae

• Sipler, R. E., S. P. Seitzinger, R.J. Lauck, L. M. McGuinness, G. J. Kirkpatrick, D. A. Bronk, C. A. Heil, L. J. Kerkhof, and O. M. Schofield. Submitted. Relationship between dissolved organic matter, bacterial community composition and rapid growth of toxic red-tide Karenia brevis. Marine Ecology Progress Series.
• Saba, G., D. K. Steinberg, D. A. Bronk, and A. R. Place. In press. The effects of harmful algal species and food concentration on zooplankton grazer production of dissolved organic matter and inorganic nutrients. Harmful Algae.
• Glibert, P. M., R. Azanza, M. Burford, K. Furuya, E. Abal, A. Al-Azri, F. Al-Yamani, P. Anderson, J. Beardall, G. M. Berg, L. Brand, D. A. Bronk, J. Brookes, J. M. Burkholder, A. Cembella, W. Cochlan, J. Collier, Y. Collos, R. Diaz, M. Doblin, T. Drennen, S. Dyhrman, Y. Fukuyo, M. Furnas, J. Galloway, E. Graneli, D. V. Ha, J. Harrison, P. Harrison, C. A. Heil, K. Heimann, R. Howarth, C. Jauzein, A. A. Kana, T. M. Kana, H. Kim, R. Kudela, C. Legrand, M. Mallin, M. Mulholland, S. Murray, J. O'Neil, G. Pitcher, Y. Qi, N. Rabalais, R. Raine, S. Seitzinger, C. Solomon, D. K. Stoecker, G. Usup, J. Wilson, K. Yin, M. Zhou, and M. Zhu. 2008. Ocean urea fertilization for carbon credits poses high ecological risks. Marine Pollution Bulletin.  56: 1049-1056.
• Bronk, D. A., M. P. Sanderson, M. R. Mulholland, C. A. Heil and J. M. O'Neil.  2004.  Organic and inorganic nitrogen uptake kinetics in field populations dominated by Karenia brevis.  In: Steidinger, K. A., J. H. Landsberg, C. R. Tomas and G. A. Vargo (Eds.), Harmful Algae 2002.  Florida Fish and Wildlife Conservation Commission, Florida Institute of Oceanography and Intergovernmental Oceanographic Commission of UNESCO, St. Petersberg, Florida, USA. pp. 80-82. (peer-reviewed book)
• Heil, C. A., M. R. Mulholland, D. A. Bronk  P. Bernhardt and J. M. O'Neil.  2004.  Bacterial and size fractionated primary production within a large Karenia brevis bloom on the west Florida shelf.  In: Steidinger, K. A., J. H. Landsberg, C. R. Tomas and G. A. Vargo (Eds.), Harmful Algae 2002.  Florida Fish and Wildlife Conservation Commission, Florida Institute of Oceanography and Intergovernmental Oceanographic Commission of UNESCO, St. Petersberg, Florida, USA. pp. 38-40. (peer-reviewed book)
• Mulholland, M. R., C. A. Heil, D. A. Bronk, J. M. O'Neil and P. Bernhardt.  2004.  Does nitrogen regeneration from the N2 fixing cyanobacteria Trichodesmium spp. fuel Karenia brevis blooms in the Gulf of Mexico?  In: Steidinger, K. A., J. H. Landsberg, C. R. Tomas and G. A. Vargo (Eds.), Harmful Algae 2002.  Florida Fish and Wildlife Conservation Commission, Florida Institute of Oceanography and Intergovernmental Oceanographic Commission of UNESCO, St. Petersberg, Florida, USA. pp. 47-49. (peer-reviewed book)

Chemical Characterization and Methods

• Lomas, M. W., D. A. Bronk, and G. van den Engh. 2011. Use of Flow Cytometry to Measure Biogeochemical Rates and Processes in the Ocean. Annual Reviews of Marine Science. 3: 537-566.
• McCarthy, M. D. and D. A. Bronk   2008.  Analytical methods for nitrogen chemical characterization and flux rates.  In: Nitrogen in the Marine Environment. Capone, D. G., D. A. Bronk , Mulholland, M. and Carpenter, E. (eds).  Elsevier. Pg. 1219-1276.
• See, J. H. and D. A. Bronk.  2005.  Changes in molecular weight distributions, C:N ratios and chemical structures of estuarine humic substances with respect to season and age.  Marine Chemistry.  97:  334-346.
• Sharp, J. H. and others including D. A. Bronk.  2002.  A preliminary methods comparison for measurement of dissolved organic nitrogen in seawater.  Marine Chemistry.  78: 171-184.
• Bronk, D. A., M. W. Lomas, P. M. Glibert, K. J. Schukert and M. P. Sanderson.  2000.  Total dissolved nitrogen analysis:  comparison between the persulfate, UV and high temperature oxidation methods.  Marine Chemistry.  69: 163-178.
• Bronk, D. A. and P. M. Glibert.  1993.  Application of a 15N tracer method to the study of dissolved organic nitrogen uptake during spring and summer in Chesapeake Bay. Marine Biology. 115: 501-508.
• Bronk, D. A. and P. M. Glibert.  1991.  A 15N tracer method for the measurement of dissolved organic nitrogen release by phytoplankton. Marine Ecology Progress Series. 77: 171-182.

Photochemistry

• Bronk, D. A., M. P. Sanderson, and D. Koopmans.  In preparation. Contribution of photochemical production of labile nitrogen to plankton nutrition in an open ocean, continental shelf, and two riverine ecosystems. 

• Koopmans, D. J. and D. A. Bronk.  2002.  Photochemical production of inorganic nitrogen from dissolved organic nitrogen in waters of two estuaries and adjacent surficial groundwaters.  Aquatic Microbial Ecology.  26: 295-304.

• Bushaw, K. L., R. G. Zepp, M. A. Tarr, D. Schulz-Jander, R. A. Bourbonniere, R. E. Hodson, W. L. Miller, D. A. Bronk and M. A. Moran.  1996.  Photochemical release of biologically labile nitrogen from dissolved organic matter. Nature.  381: 404-407.

Groundwater

• Joye, S.B., D. A. Bronk, D. J. Koopmans, and W. S. Moore. 2006. Evaluating the potential importance of groundwater-derived carbon, nitrogen, and phosphorus inputs to South Carolina and Georgia coastal ecosystems. In: G.S. Keleppel, M.R. De Voe and M.V. Rawson (Editors), Changing Land Use Patterns in the Coastal Zone. Springer, New York, pp. 139-178.

Natural Abundance and Food Web Studies

• Hoffman, J. C., K.E. Limburg, D. A. Bronk, and J.E. Olney.  2008.  Overwintering habitats of migratory juvenile American shad in Chesapeake Bay.  Environmental Biology of Fishes.  81: 329-345.
• Hoffman, J. C., D. A. Bronk, and J.E. Olney.  2008.  Organic Matter Sources Supporting Lower Food Web Production in the Tidal Freshwater Portion of the York River Estuary, Virginia.  Estuaries and Coasts.  31: 898-911.
• Hoffman, J. C., D. A. Bronk, and J.E. Olney.  2007.  Contribution of allochthonous carbon to American shad production in the Mattaponi River, Virginia using stable isotopes.  Estuaries and Coasts.  30(6): 1034-1048.
• Hoffman, J. C., D. A. Bronk, and J.E. Olney.  2007.  Heterogeneous use of nursery habitat identified in young American shad using stable isotopes.  Transactions of the American Fisheries Society.  136 (5): 1285-1297.
• Hoffman, J. C. and D. A. Bronk.  2006. Interannual variation in stable carbon and nitrogen isotope biogeochemistry of the Mattaponi River, Virginia. Limnology and Oceanography.  51 (54): 2319-2332.

Lab Group

Current

• Marta Sanderson, Lab manager
• Quinn Roberts, Field manager
• Ed Keesee, Research technician
• Valerie Johnson, Lab technician
• Rachel Sipler, Post-doctoral researcher
• Lynn Killberg, Ph.D. student
• Steve Baer, Ph.D. student
• Carolina Funkey, M.S. student
• Jenna Spackeen, M.S. student

Past Students and Post-docs

• Gabrielle McIninch, High school intern 2010
  
• Genevieve Ho, REU student 2009
• Monica Poteat, REU student 2009
• Rob Condon, Post-doc completed August 2008 (VIMS)

• Paul Bradley, Ph.D. completed August 2008 (VIMS)
• Joel Hoffman, Ph.D. completed May 2006 (VIMS)
• Jason See, Ph.D. completed December 2004 (VIMS)
• Dirk Koopmans, Masters student at University of Georgia. M.S. completed December 2000.

Service on Student Committees

Graduate students

• 2010-present    Lori Price, M.S. student (SMS/VIMS)
• 2009-2010       Xiao Liu, M.S. student (SMS/VIMS)
• 2009-2011       Chris Hauser, M.S. student (SMS/VIMS)
• 2008-2009      Glaucia Moreira Fragoso, M.S. student (SMS/VIMS)
• 2004-2010   Sasha Tozzi, Ph.D. student (SMS/VIMS)
• 2004-2009       Grace Saba (Henderson), Ph.D. student (SMS/VIMS)
• 2002-2010    Frank Parker, Ph.D. student (SMS/VIMS)
• 2003-2008    Amanda Spivak, Ph.D  (SMS/VIMS)
• 2006-2008    Andre Buchheister, M.S. student (SMS/VIMS)
• 2003-2008    Rob Condon, Ph.D. (SMS/VIMS)
• 2006-2007    Azure Bevington, M.S. (SMS/VIMS)
• 2005-2007     Emily Chandler, M.S. (SMS/VIMS)
• 2001-2005    Jill Peloquin, Ph.D. (SMS/VIMS)
• 2000-2005    Oliver, Jacque, Ph.D. (SMS/VIMS)
• 2000-2003    Delizo, Lisa. M.S  (SMS/VIMS)
• 1999-2000    Burbage, Chris. Ph.D.  (UGA)
• 1998-2000    Sullivan, James. Ph.D.  (UGA)
• 1997-2002    Allen, Andrew. Ph.D.  (UGA)
• 1995-2001    Gibson, Deidre. Ph.D.  (UGA)
• 1996-1998    Wrona, Amanda. M.S.   (UGA)
• 1995-1998    Otero, Ernesto. Ph.D.  (UGA)

Undergraduate and High School Mentor  

• 2009    Genevieve Ho, Summer REU (SMS)
• 2009    Monica Poteat, Summer REU (SMS)
• 2007    Stephanie Henderson.  Summer REU student (SMS)
• 2003    Michael D'Amico.  Summer REU student (SMS)
• 2003    Cynthia Craig.  Summer REU student (SMS)
• 2001    Sara Harris.  Served as FIRST mentor during summer internship.
• 1998    Benjamin Wheeler.  Undergraduate senior thesis (UGA)
• 1998    Laura Wingate.  Undergraduate senior thesis (UGA)
• 1998    Mark Novak.  Undergraduate senior thesis (UGA)
• 1997    Jason Dempsey.  Undergraduate senior thesis (UGA)
• 1997    Chris Carter.  Undergraduate senior thesis (UGA)
• 1996    Kevin Morris.  Undergraduate senior thesis (UGA)
• 1995    John Belin.  Undergraduate senior thesis (UGA)

Recent Field Work

• 2010 (October) - R/V Pelican (LUMCON), scientist, 14-day cruise in the Gulf of Mexico to measure nitrogen flux rates as part of an ECOHAB project.

• 2010 (August) - 8-day trip to Barrow, Alaska as part of an NSF project
• 2010 (August) - R/V Hugh Sharp (U. Delaware), scientist, 7-day  cruise in Chesapeake Bay to measure nitrogen flux rates as part of an NSF project.
• 2010 (April) - 8-day trip to Barrow, Alaska as part of an NSF project
• 2008 (October) – R/V Pelican (LUMCON), Scientist, 14-day cruise in the Gulf of Mexico to measure nitrogen flux rates as part of a NOAA-ECOHAB-funded project.
• 2007 (October) – R/V Pelican (LUMCON), Scientist, 14-day cruise in the Gulf of Mexico to measure nitrogen flux rates as part of a NOAA-ECOHAB-funded project.
• 2006 (November) – R/V Pelican (LUMCON), Scientist, 10-day cruise from Trinidad to Puerto Rico to measure nitrogen flux rates as part of a DOE-funded project.
• 2006 (April) – R/V Point Sur (Moss Landing Marine Laboratory), Chief scientist, 9-day cruise in the Santa Barbara channel to measure carbon and nitrogen flux rates as part of the Biocomplexity project.
• 2005 (April) – Four week mesososm study in Bergen, Norway.
• 2005 (April) – R/V Cape Henlopen (University of Delaware), Chief scientist, 7-day cruise in Chesapeake Bay to measure carbon and nitrogen flux rates as part of the Biocomplexity project.
• 2004 (August) – R/V Cape Henlopen (University of Delaware), Scientist, 5-day cruise in Chesapeake Bay to measure nitrogen flux rates.
• 2004 (July) – R/V Cape Henlopen (University of Delaware), Chief scientist, 7-day cruise in Chesapeake Bay to measure carbon and nitrogen flux rates as part of the Biocomplexity project.
• 2003 (March) – Four week mesososm study in Bergen, Norway.
• 2003 (June) – R/V Pelican (LUMCON), Scientist, 14-day cruise in the Gulf of Mexico to quantify nitrogen fixation and organic nitrogen release rates by Trichodesmium

Courses Taught or Teaching

• Spring 2010 - MSCI 330: Introduction to Marine Science, W&M, 50%
• Summer 2009 - Guest instructor in Microbial Oceanography, Center for Microbial Oceanography, University of Hawaii, Honolulu, HI
• Fall 2008 - MSCI 698: Harmful Algal Blooms, SMS/VIMS, 50%
• Spring 2008 - MSCI 502: Coordinator and contributor to Coastal and Estuarine Processes and Issues, SMS/VIMS, 30%
• Summer 2008 - Guest instructor in Microbial Oceanography, Center for Microbial Oceanography, University of Hawaii, Honolulu, HI
• Spring 2007 - MSCI 502: Coordinator and contributor to Coastal and Estuarine Processes and Issues, SMS/VIMS, 48%
• Fall 2006 - MSCI 655: Stable Isotope Biogeochemistry, SMS/VIMS, 50%
• Fall 2006 - MSCI 501L: Fundamentals of Marine Sciences Lab, SMS/VIMS, 7%
• Spring 2006 - MSCI 502: Coordinator and contributor to Coastal and Estuarine Processes and Issues, SMS/VIMS, 48%.
• Spring 2005 - MSCI 502: Coordinator and contributor to Coastal and Estuarine Processes and Issues, SMS/VIMS, 20%
• Fall 2005 - MSCI 501L: Fundamentals of Marine Sciences Lab, SMS/VIMS, 7%
• Spring 2004 - MSCI 502: Coordinator and contributor to Coastal and Estuarine Processes and Issues, SMS/VIMS, 20%
• Fall 2004 - MS 501L: Fundamentals of Marine Sciences Lab, SMS/VIMS, 7%
• Fall 2004 - MS 698: Isotope Biogeochemistry, SMS/VIMS, 50%, 50%

Recent invited presentations

2010

• Bioavailability of DON in aquatic systems, University of Maine, Orono, ME.
• Ocean Acidification, Barrow, AK
• Ocean Acidification: What it means for Virginia, Environment Virginia Conference, Lexington, VA
• Ocean Acidification, Naro Theater, Norfolk, VA

2009     

• Role of DON in the Open and Coastal Ocean.  Talk presented at University of North Carolina, Morehead City, NC.
• Learning to do the splits - straddling systems, disciplines, and the applied versus basic divide.  Women in Science breakfast.  Coastal Estuarine Research Federation meeting, Portland, OR.
• Role of DON in the Open and Coastal Ocean.  Talk presented at Princeton University, Princeton, NJ.
• US OCB Interests and Needs.  Talk presented at the Observing Biogeochemical Cycles at Global Scales with Profiling Floats and Gliders Workshop, Monterey, CA.
•  The Need for Sustained Ocean Observations.  U.S. Carbon Cycle Scientific Steering Group meeting, Reston, VA.
•  Guest instructor and seminar speaker, Microbial Oceanography: Genomes to Biomes, University of Hawaii, Manoa, Honolulu, HI.

2008

• U.S. OCB Interests and Needs.  Talk presented at the Changing Times Workshop at Scripps Institute of Oceanography.  LaJolla, CA.
• Guest instructor and seminar speaker, Microbial Oceanography: Genomes to Biomes, University of Hawaii, Manoa, Honolulu, HI.
• The emerging role of DON in open ocean and coastal systems in a changing world.  Lamont Doherty Earth Observatory, Columbia University, Palisades, NY.  May 2008
• Stuff I think you might find interesting.  DOM Workshop on Florida Bay, Miami, FL

2007

• Transformations of DON in marine and aquatic systems. Establishing a Research Agenda for Assessing the Bioavailability of Wastewater-Derived Organic Nitrogen in Treatment Systems and Receiving Waters, Annapolis, MD.  
• The Marine Nitrogen Cycle: Who is doing what?  OCB workshop, Woods Hole, MA.
• DON as a source of bioavailable N for phytoplankton.  Rutgers University, Rutgers, NJ.  September 2007
• DON as a source of bioavailable N for phytoplankton.  Arizona State University, Tempe, AZ.

2006

• DON as a source of bioavailable N for phytoplankton.  University of Wisconsin, Milwaukee, WI.

2005

• How to be a successful marine scientist: Advice from the trenches. Graduate student symposium at the ASLO meeting in Santiago de Campostella, Spain.
• Dissolved organic nitrogen as a source of bioavailable nitrogen for phytoplankton.  SPOT-ON Workshop, Warnemunde Germany.  

Professional Service

• 2010-2011   Member, Nutrient Criteria Review Panel, Environmental Protection Agency

• 2011      Co-organizer and co-chair, special session, Advancing the science and ethics of plankton ecology: The legacy of Peter Verity, with M. Frischer,  ASLO meeting, San Juan, Puerto Rico.

• 2009-2011    Chair, Finance Committee, American Society of Limnology and Oceanography (ASLO). 
• 2008-2014   President, American Society of Limnology and Oceanography (ASLO).  Will serve two years as President-elect, two years as President, and two year as Past-President.

• 2010-present   Member, Ocean Time-Series Advisory Committee (OTSAC, NSF and OCB)

• 2008     Co-organizer and co-chair, special session, Taxon-specific Biogeochemistry in Aquatic Systems, with M. Lomas and M. Mulholland,  ASLO meeting, Orlando, FL.
• 2007     Mentor, MS PHDS (Minorities Striving and Pursuing Higher Degrees of Success in Earth System Science) program at the OCB meeting, Woods Hole, MA.
• 2007-2009   Chair, Ocean Time-Series Advisory Committee (OTSAC, NSF and OCB).
• 2007-2009   Chair, ASLO's Meeting Committee.
• 2006-2010   Member of ASLO's Education Committee's Sub-committee on web-based lectures.
• 2006-2008   Scientific advisor to the Chesapeake Bay's Scientific and Technical Advisory Committee on DON bioavailability in wastewater.
• 2005-2007   Co-chair of 2007 ASLO meeting in Santa Fe, NM.
• 2006   Co-organizer and co-chair of a special session, In search for allochthony, with my former student, Joel Hoffman, at the 2007 ASLO meeting in Santa Fe, NM.
• 2006-present   Invited member of the  Ocean Carbon and Biogeochemistry (OCB) Scientific Steering Committee (SSC) assembled by the National Science Foundation. The role of OCB SSC is to define goals and develop programs for research into ocean biogeochemistry.
• 2006   Invited participant in the State of the Research on Red Tide in the Gulf of Mexico workshop at Mote Marine Laboratory in Sarasota, FL.
• 2006   Invited participant in Ocean Carbon and Climate Change workshop in Woods Hole, MA.
• 2005   Invited participant and invited speaker at the Significant Processes, Observations, and Transformations in Ocean Nitrogen (SPOT-ON) in Warnemunde, Germany.
• 2003-2007   Member of ASLO's Publications Committee.
• 2003-2006   Elected to ASLO's Board of Directors as a Member-at-Large.
• Reviewer for: Acta Oecologica, Aquatic Microbial Ecology, Biogeochemistry, Critical Reviews in Environmental Science and Technology, Deep Sea Research I, Deep Sea Research II, Ecology, Environmental Science and Technology, Estuaries, Estuaries and Coasts, Estuarine Coastal and Shelf Science, Geochim Costochim Acta, Geophysical Research Letters, Hydrobiologia, Journal of Air and Waste Management Association, Journal of Experimental Marine Biology and Ecology Journal of Geophysical Research Ocean, Journal of Marine Research, Journal of Phycology, Journal of Plankton Research, Limnology and Oceanography, Limnology and Oceanography Methods, Marine Biology, Marine Chemistry, Marine Ecology Progress Series, Microbial Ecology, New Phytologist, Ophelia, Science, Water resources.
• Reviewer for: Environmental Protection Agency, National Environmental Research Council, National Underwater Research Council (NURC/UNCW), National Science Foundation (Biological Oceanography, Chemical Oceanography, Environmental Geochemistry and Biogeochemistry, Biocomplexity, Research Coordination Networks), National Oceanographic and Atmospheric Administration (ECOHAB, GOMEX, Sea Grant), US-Israel Binational Research Foundation, Water Resources Research Council.
• Panelist for: Environmental Protection Agency - STAR Fellowship, NSF Antarctic Oceans & Atmospheric Sciences, NSF Biocomplexity in the Environment – Coupled Biogeochemical Cycles (BE-CBC), NSF Chemical Oceanography, NOAA Ecology of Harmful Blooms (ECOHAB), NSF Environmental Geochemistry and Biogeochemistry, NSF Research Coordination Networks (RCN).

 

University Service

College-Wide Service

• 2005-2006    Participant in the William and Mary Teaching Project
• 2005-present   Moderator for qualifying exams: Kristen Brentro (M.S., 2005), Constance Sullivan (M.S., 2006), Yanxia Ma (Ph.D. 2006), Bryce Brylawski (Ph.D., 2007), Bethany Eden (M.S. 2007); Heidi Geiss (Ph.D. 2007), Patrick McGrath (Ph.D. 2008), Cielomar Rodriquez (M.S. 2008), Lynn Waterhouse (2009)
• Moderator for thesis and dissertation defenses: Elizabeth Waterson (M.S., 2005), Danielle Johnson (M.S. 2006), Constance Sullivan (M.S. 2006), Kristin France (Ph.D. 2007); Emily Chandler (M.S. 2007); Chris Long (Ph.D. 2007), Patrick Lynch (M.S. 2007), Vince Lovko (Ph.D. 2008), Brian Barnes (M.S. 2008)
• 2002-2003    Member, Search Committee for Dean/Director of the School of Marine Programs, VIMS, College of William and Mary
• 1995    Member, Search Committee for Director of the School of Marine Programs, University of Georgia
• 1994-2000      Originator and coordinator, Undergraduate Marine Sciences Program, Department of Marine Sciences, University of Georgia

SMS/VIMS Governance

• 2010   Member, Search Committee for Associate Dean of Graduate Studies, VIMS

• 2005-present      Chair, VIMS Vending Commissions Fund Committee and holiday party organizer!
• 2005-2007          Alternate, Faculty Council representing the Department of Physical Science, SMS/VIMS
• 2006-2008         Member, Seminar Committee, SMS/VIMS
• 2005-2006         Co-chair, Seminar Committee, SMS/VIMS
• 2004-2008         Elected departmental representative, Physical Sciences to Faculty Status and Tenure Review Committee, SMS/VIMS
• 2002-2004    Co-chair, Admissions Committee, SMS/VIMS
• 2001-2004    Member, Admissions Committee representing the Department of Physical Science, SMS/VIMS
• 2001-2002    Alternate, Academic Council representing the Department of Physical Science, SMS/VIMS
• 2000-2002    Member, Department of Physical Sciences Web Site Committee, SMS/VIMS
• 1997    Member, Search Committee for Assistant Professor position in Marine Science, Department of Marine Sciences, University of Georgia    
• 1995-1999    Member, Division of Biological Sciences Curriculum Committee, University of Georgia        
• 1995-2000    Academic advisor for the Division of Biological Sciences, University of Georgia.
• 1995-2000    Academic advisor for the Department of Marine Sciences, University of Georgia. Nominated for the 1998 Outstanding Faculty Advisor Award in the Franklin College of Arts and Sciences.
• 1994-2000    Co-Chair, Academic Affairs Committee, Department of Marine Sciences, University of Georgia
• 1994-2000    Chair, Subcommittee of Undergraduate Affairs, Department of Marine Sciences, University of Georgia