menu
VIMS Logo
search
Virginia Institute of Marine Science

Deborah A. Bronk

Professor of Marine Science

Email : [[bronk]]
Phone : (804) 684-7779
Office : Chesapeake Bay Hall N311
Department : Physical Sciences
Lab Website : {{http://www.vims.edu/research/departments/physical/programs/nitrogen/index.php}}

Research Interests

My research is all about NITROGEN!  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.  I continue to be intrigued by methods development, and I have been working on linking flow cytometry with 15N-tracer techniques to quantify nitrogen flow into autotrophs versus heterotrophs in open-ocean systems.  More recently I have started working on DON in effluent and its surprising how cool waste water treatment plants can be!

Education
  • B.S., University of Miami, Coral Gables, FL
  • Ph.D., University of Maryland, Horn Point Laboratory
Positions
  • 2012-present    Section Head, Ocean Science Section, National Science Foundation, Arlington, VA
  • 2011-2012         Federal Science and Research Liaison, Virginia Institute of Marine Science (VIMS)
  • 2007-present   Professor, VIMS, the College of William & Mary, Gloucester Point, VA
  • 2000-2006       Associate Professor, VIMS, the College of William & Mary, Gloucester Point, VA
  • 1999-2000        Associate Professor of Marine Sciences, University of Georgia, Athens, GA
  • 1994-1999         Assistant Professor of Marine Sciences, University of Georgia, Athens, GA
  • 1992-1993         Postgraduate Researcher, University of California, Santa Cruz, CA
  • 1988-1992         Graduate Research Assistant, University of Maryland, Cambridge, MD
  • 1987-1988         Sea Grant Trainee, University of Maryland, Cambridge, MD
  • 1988-1987         Horn Point Laboratory Graduate Fellow, University of Maryland
  • 1985-1986         Student Assistant in Marine Biology, University of Miami, Miami, FL
Awards and Honors
  • 2011                   Plumeri Award for Faculty Excellence, The College of William & Mary
  • 2011-2012        Treasurer, Council of Scientific Society Presidents
  • 2009-2010       Member-at-large, Council of Scientific Society Presidents
  • 2009                  Dean’s Prize for the Advancement of Women in Science
  • 2009-2012       Member, U.S. Nat'l Committee, Intergovernmental Oceanographic Commission (IOC), UNESCO
  • 2008-2011        Member, U. S. Carbon Cycle Science Plan Working Group
  • 2008-2010       President-elect, American Society of Limnology and Oceanography (ASLO)
  • 2010-2012        President, Association for the Sciences of Limnology and Oceanography (ASLO, new name)
  • 2012-2014        Past-president, Association for the Sciences of Limnology and Oceanography
  • 2006-2009       Member, Ocean Carbon and Biogeochemistry (OCB) Scientific Steering Committee (SSC)
  • 2005                  Krispy Kreme Award recipient for effective use of a doughnut metaphor, SPOT-ON workshop  : )
  • 1996                   Lindeman Award recipient for the outstanding paper in aquatic sciences by a young scientist, ASLO
  • 1995                   Recipient of the Antarctic Service Medal
  • 1993                   Selected for Dissertations Symposium on Chemical Oceanography (DISCO), Honolulu, HI
Current Projects

Note that during my service at NSF my name had to be removed from new federal grants or a substitute PI had to be names for existing federal grants.

  • Interdisciplinary Study Plan Integrating Across One or More Watersheds in the Alaska Portion of the ALCC.  Funded by US Fish and Wildlife Service, Arctic LCC.  ~2013-2015.  VIMS' part $~$265,000. Sipler, R. (PI), Bronk, D. (Co-PI), M. Frischer and J. Nejstgaard (Co-PIs, SkIO), and T. Sutton (Co-PI, UAlaska).  
  • How Will Marine Food Webs in the Coastal Arctic Respond to Increased Runoff Associated With Permafrost Melt?  Funded by US Fish and Wildlife Service, Arctic LCC.  2012-2013.  $33,211.  Bronk, D. (PI),Sipler, R. (Co-PI), M. Frischer and J. Nejstgaard (Co-PIs, SkIO), and T. Sutton (Co-PI, UAlaska). 
  • MRI:  Acquisition of a flow cytometer with high speed sorting to advance aquatic science research and education.  Funded by NSF-MRI.  2012-2014.  Bronk part $$580,393.  Bronk, D. (PI), A. Beck (Co-PI), and K. Reece (Co-PI).
  • Effluent organic nitrogen produced within wastewater treatment plants.  Funded by Water Environment Research Federation with in-kind support from Hampton Roads Sanitation District.  2012-2014.  ~$255,000.  Bronk part $377,744.  Bronk, D. (PI) and R. Sipler (Co-PI).
  • Synergistic effects of iron, carbon dioxide and temperature on the fate of nitrate: Implications for future changes in export production in the Southern Ocean.  Funded by NSF: Antarctic Ocean and Atmospheric Science. 2011-2014. Bronk part $476,668.   Allen, A. (PI, JCVI), D. Hutchin (Co-PI, USC), and D. Bronk (Co-PI).
  • 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).
Past Projects
  • 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).
  • 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

Refereed Publications, Chapters in Books:      
(* indicates work done by a student, technician, or post-doc in my laboratory or work that was done in my laboratory)

Submitted or in preparation:
*Baer, S. E and D. A. Bronk.  In preparation.  Nitrogen uptake rates of low- and high-nucleic acid bacterial subgroups from the coastal Chukchi Sea in the Arctic. 

*Baer, S. E., R. E. Sipler, Q. Roberts, P. L. Yager, M. E. Frischer, and D. A. Bronk.  In preparation.  Seasonal nitrogen uptake and regeneration in the western coastal Arctic.  For submission to Limnology and Oceanography.

*Baer, S. E., R. E. Sipler, T. L. Connelly, P. L. Yager, and D. A. Bronk.  In preparation.  The effect of temperature on rates of ammonium uptake and nitrification in the western coastal Arctic during winter, spring and summer.  For submission to Global Biogeochemical Cycles.

*Baer, S. E., T. L. Connelly, and D. A. Bronk.  In preparation. Nitrogen uptake dynamics in Arctic landfast ice.  For submission to Polar Biology.

*Sipler, R.E. and D. A. Bronk.  In preparation. Dynamics of dissolved organic nitrogen.  In Biogeochemistry of Marine Dissolved Organic Matter.  Eds.  Hansell, D. A. and Carlson, C. A.

Tait, Z. S., R. E. Sipler, A. Stubbins, V. D. Baylor, Q. N. Roberts, M. Thompson, D. A. Bronk, and M. E. Frischer.  Submitted.  Effect of photodegradation on bioavailability of Arctic terrestrial dissolved organic matter.

Tait, Z. S., R. E. Sipler, A. Stubbins, V. D. Baylor, Q. N. Roberts, P. Hoant, D. A. Bronk, and M. E. Frischer.  Submitted.  Increased terrestrial carbon flux from melting permafrost may stimulate bacterial nitrate uptake in the Arctic Ocean.  Limnology and Oceanography.

*Sipler, R. E., C. B. Bott, D. A. Bronk.  Submitted.  Chemical characterization of dissolved organic nitrogen present at different stages throughout the wastewater treatment process.  Water Research.

*Funkey, C. P., R. J. Latour, and D. A. Bronk.  Submitted.  Abiotic release of low molecular weight nitrogen from wastewater treatment plant effluent organic nitrogen.

*Killberg-Thoreson, L., Sipler, R. E., S. P. Seitzinger, R.J. Lauck, L. M. McGuinness, G. J. Kirkpatrick, Q. N. Roberts, M. P. Sanderson, M. Garrett, C. A. Heil, M. R. Mulholland, and D. A. Bronk. Submitted. Diel variability of nitrogen uptake by Karenia brevis in a field population and in cultures. Journal of Phycology.

Published or in press:

*Killberg-Thoreson, L.,M. R. Mulholland, C. A. Heil, M. P. Sanderson, J. M. O'Neil, and D. A. Bronk. In press. Nitrogen uptake kinetics in field populations and cultured strains of Karenia brevis. Harmful Algae.

Mulholland, M. R., P. W. Bernhardt, I. Ozmon, L. A. Procise, M. Garrett, J. O’Neil, C. Heil, and D. A. Bronk.  In press.  Contributions of N2 fixation to N inputs supporting Karenia brevis blooms in the Gulf of Mexico. Harmful Algae

Heil, C. D. Bronk, L. K. Dixon, G. Hitchcock, G. Kirkpatrick, M. Mulholland, J. O’Neil, J. Walsh, R. Weisberg, and M. Garrett.  In press.  The EOHAB: Karenia Program. Harmful Algae.

Bronk, D.A., L. Killberg-Thoreson, R. E. Sipler, Q. N. Roberts, M. R. Mulholland, P. Bernhardt, M. Garrett, and C. A. Heil. In press. Inorganic and organic nitrogen cycling on the West Florida shelf. Harmful Algae. 

*Killberg-Thoreson, L., R. E. Sipler, C. A. Heil, M. J. Garrett, Q. R. Roberts and D. A. Bronk. In press. Nutrients release from decaying fish support microbial growth in the eastern Gulf of Mexico. Harmful Algae.

Benavides, M., D. A. Bronk, N. S. R. Agawin, M. D. Pérez-Hernández, A. Hernández-Guerra, J. Arístegui. 2013. Longitudinal variability of size-fractionated N2 fixation and DON release rates along 24.5ºN in the subtropical North Atlantic.  Journal of Geophysical Research Oceans.  DOI: 10.1002/jgrc.20253.

*Sipler, R. E., D. A. Bronk, S. P. Seitziner, R. J. Lauck, L. R. McGuinness, G. J. Kirkpatrick, C. A. Heil, L. J. Kerkhof, O. M. Schofield. 2013.  Trichodemium sp. derived dissolved organic matter is a source of nitrogen capable of supporting the growth of toxic red tide Karenia brevis. Marine Ecology Progress Series.  483: 31-45.

*Killberg-Thoreson, L., R. E. Sipler, and D. A. Bronk. 2013. Anthropogenic nutrient sources supplied to a Chesapeake Bay tributary support algal growth: A bioassay and high-resolution mass spectrometry approach. Estuaries and Coasts. 10.1007/s12237-013-9604-5

Osborne, D. M., D. C. Podgorsk, D. A. Bronk, Q. Roberts, R. E. Sipler, D. Austin, J. S. Bays, and W. T. Cooper. 2013. Molecular-level characterization of reactive and refractory dissolved natural organic nitrogen compounds by atmospheric pressure photoinization coupled to Fourier transform-ion cyclotron resonance mass spectrometry.  Rapid Communications in Mass Spectrometry.  27 (8): 851-858, DOI: 10.1002/rcm.6521.

Mesfioui, R., N. G. Love, D. A. Bronk, M. R. Mulholland, and P. G. Hatcher.  2012.  Reactivity and chemical characterization of effluent organic nitrogen from wastewater treatment plants determined by Fourier transform ion cyclotron resonance mass spectrometry. Water Research. 46 (3): 622-634.

John, D.E., J. E. Corredor, J. M. López-Díaz, A. Cabrera, D. A. Bronk, N. Santiago, and J. H. Paul.  2012.  A day in the life in the dynamic marine environment: how nutrients shape diel patterns of phytoplankton photosynthesis and carbon fixation gene expression in the Mississippi and Orinoco River plumes.  Hydrobiologia. 679:155–173.

Wawrik, B., W. B. Boling, J. D. Van Nostrand, J. Xie, J. Zhou, and D. A. Bronk.  2012.  Assimilatory nitrate utilization by bacteria on the West Florida Shelf as determined by stable isotope probing and functional microarray analysis.  FEMS Microbiology Ecology.  79: 400-411.

Voß, Maren, D. Bronk, B. Deutsch, R. Purvaja, R. Ramesh, T. Rixen, R. Sipler, and N. Wannicke.  2011. Internal cycling of nitrogen and nitrogen transformations.  In: Treatise on Estuarine and Coastal Science.  Wolanski, E. and D.S. McLusky (eds). 5:  231-259.

*Condon, R. H., D. K. Steinberg, P. A. del Giorgio, T. C. Bourvier, H. Ducklow, and D. A. Bronk.  2011. 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. doi:10.1073/pnas.1015782108, 108: 10225-10230.

*Saba, G., D. K. Steinberg, and D. A. Bronk. 2011. The relative importance of sloppy feeding, excretion, and fecal pellet leaching in the release of dissolved carbon and nitrogen by Acartia tonsa copepods.  Journal of Experimental Marine Biology and Ecology.  404: 47-56.

Love, N.G., M. R. Mulholland, and D. A. Bronk.  2011. Nutrients and their Effect on the Environment.  In: Nutrient Removal.  WEF Manual of Practice No. 34.  WEF Press. pg. 2-33.

*Saba, G., D. K. Steinberg, D. A. Bronk, and A. R. Place. 2011. The effects of harmful algal species and food concentration on zooplankton grazer production of dissolved organic matter and inorganic nutrients. Harmful Algae.  10: 291-303.

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.

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.  2011.  The bioavailability of effluent-derived organic nitrogen along an estuarine salinity gradient.  Estuaries and Coasts.  34: 269-280.

*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.

Bronk, D. A., Q. Roberts, E. Canuel, P. Hatcher, R. Mefioui, K. C. Filippino, M. R. Mulholland, and N. Love.  2010. Effluent organic nitrogen (EON): Bioavailability and photochemical and salinity release.  Environmental Science and Technology.  44:  5830-5835.

*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. 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.

*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.

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.

*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.

*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.

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.

*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. 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.

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., Bronk, D. A., Mulholland, M. and Carpenter, E. (eds).  Elsevier Press.  Pg. 1219-1276.

*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.  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.

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.  Journal of Environmental Marine Biology and Ecology.  349: 390-404.

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.

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.

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.

Nejstgaard, J. C., M. E. Fischer, P. G. Verity, J. T. Anderson, A. Jacobsen, M. J. Zirbel, A. Lersen, J. Martinez-Martinez, A. F. Sazhin, T. Walters, D. A. Bronk, S. J. Whipple, S. Borett, B. C. Patten, and J. D. Long.  2006.  Plankton development and trophic transfer in seawater enclosures with nutrients and Phaeocystis pouchetii added.  Aquatic Microbial Ecology.  321:99-121.

*See, J. H, D. A. Bronk, and A. Lewitus.  2006. Uptake of Spartina-derived humic nitrogen by estuarine phytoplankton in nonaxenic and axenic culture. Limnology and Oceanography.  51 (5): 2290-2299.

*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.

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.

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.

*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.

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.

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)

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)

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)

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.

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.

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.

Allen, A.E., M. H. Howard-Jones, M. G. Booth, M. E. Frischer, P. G. Verity, D. A. Bronk and 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.

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.  2002.  Dynamics of dissolved organic nitrogen.  In Biogeochemistry of Marine Dissolved Organic Matter.  Eds.  Hansell, D. A. and Carlson, C. A.  pg. 153-247.

*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.

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.

Cochlan, W. P. and D. A. Bronk.  2001.  Nitrogen uptake kinetics in the Ross Sea, Antarctica.  Deep-Sea Research II. 48: 4127-4153.

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., 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 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. Sahlsten 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.

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.

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. Awarded the Lindeman Award by the American Society of Limnology and Oceanography  for the “outstanding paper in aquatic sciences by a young scientist”

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.

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.


Edited books and journals

Taylor, P., K. Tedesco, and D. A. Bronk (eds). 2010.  Oceanography Magazine: Celebrating 50 years of the Intergovernmental Oceanographic Commission. Volume 23.

Capone, D. G., D. A. Bronk, M. Mulholland and E. Carpenter (eds).  2008.  Nitrogen in the Marine Environment.  Elsevier Press.  Amersterdam. pp. 1729.

Lab Group
Current
  • Marta Sanderson, Lab manager
  • Quinn Roberts, Field manager
  • Valerie Johnson, Lab technician
  • Rachel Sipler, Research scientist
  • Steve Baer, Ph.D. student
  • Jenna Spackeen, M.S. student
Past Students and Post-docs
  • Lynn Killberg-Thoreson, Ph.D. completed 2011 (VIMS)
  • Carolina Funkey, M.S. completed 2012 (VIMS)
  • Gabrielle McIninch, High school intern 2010, 2011, 2012 (VIMS)
  • Genevieve Ho, REU student 2009 (VIMS)
  • Monica Poteat, REU student 2009 (VIMS)
  • 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
  • 2013-present      Jessica Lisa, Ph.D. student (VIMS)
  • 2012-present      Brandon J. Conroy, Ph.D. student (VIMS)
  • 2011-present      Michael Kong, Ph.D. (University of Alaska, Fairbanks, AK)
  • 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
  • 2013 (January) – Three week trip to McMurdo Station, Antarctica as part of an NSF project.
  • 2012 (January) – 8-day trip to Barrow, Alaska as part of an NSF project.
  • 2011 (April) – 8-day trip to Barrow, Alaska as part of an NSF project.
  • 2011 (January) – 8-day trip to Barrow, Alaska as part of an NSF project.
  • 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
  • Summer 2012 - Guest instructor in Microbial Oceanography, Center for Microbial Oceanography, University of Hawaii, Honolulu, HI
  • Spring 2012 - MSCI 330: Introduction to Marine Science, W&M, 50%
  • 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
2013   
  • Competition between phytoplankton and bacteria for nitrogen in the Arctic Ocean. Talk presented at the Crary Lab, McMurdo Station, Antarctica.
  • A Washington Perspective, VIMS Council.
2012
  • NSF – A view from the inside.  Physical Sciences Departmental Seminar, VIMS.
  • The problem of effluent organic nitrogen.  Physical Sciences Departmental Seminar, VIMS.
  • Research in the Arctic.  Talk presented to VIMS donors.
  • Bronk, D. A., R. Sipler, S. Baer, Q. Roberts, T. Connelly, K. Sines, Z. Tait, M. Frischer, and P. Yager. 2012. Competition between phytoplankton and bacteria for nitrogen in the coastal Chukchi Seat. ASLO meeting, Lake Biwa, Japan
  • Nitrogen cycling in the Arctic: shifting paradigms in a time of change. Microbial Oceanography: Genomes to Biomes, University of Hawaii, Manoa, Honolulu, HI.
  • How science is done in America.  Talk presented at the Saturday Science talks in Barrow, Alaska.
  • Challenges in Ocean Science: A view from many angles.  Talked presented at the National Science Foundation
2011
  • The problem of effluent organic nitrogen, invited talk in Science Serving Coastal Communities:  Research Translated to Management Actions, CERF meeting, Daytona, FL  (November 2011).
  • DON bioavailability – Breaking open black boxes.  Old Dominion University. 
  •  Contribution of organic nitrogen to eutrophication, 8th Baltic Sea Conference, St. Petersburg, Russia. 
  • Nitrogen use in aquatic systems, Stony Brook University, Stony Brook, NY.
  • ASLO's Future – Opportunities and Challenges, San Juan, Puerto Rico.
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.