Margaret Mulholland

Ph.D. in Biological Oceanography, University Of Maryland, (1998)

M.M. in Marine Affairs, University of Washington, (1992)

M.S. in Biological Oceanography, University of Washington, (1986)

B.S. in Geology/Biology, University of Notre Dame, (1984)

Expertise

Articles

Sedwick, P., Bernhardt, P. W., Mulholland, M. R., Najjar, R., Blumen, L., Sohst, B., Sookhdeo, C. and Widner, B. (2018). Assessing phytoplankton nutritional status and potential impact of wet deposition in seasonally oligotrophic waters of the Mid-Atlantic Bight. Geophysical Research Letters.

Mulholland, M. R., Morse, R. E., Egerton, T., Bernhardt, P. W. and Filippino, K. C. (2018). Blooms of dinoflagellate mixotrophs in a lower Chesapeake Bay tributary: Carbon and nitrogen uptake over diurnal, seasonal, and interannual timescales. Estuaries and Coasts.

Najjar, R., Herrman, M., Alexander, R., Boyer, E. W., Burdige, D. J., Butman, D. E., Cai, W. J., Canuel, E. A., Chen, R. F., Friedrichs, M. A., Feagin, R. A., Griffith, P. C., Hinson, A., Holmquist, J. R., Hu, X., Kemp, W. M., Kroeger, K. D., Mannino, A., McCallister, S. L., McGillis, W. R., Mulholland, M. R. and et al. (2018). Carbon budget of tidal wetlands, estuaries, and shelf waters of Eastern North America. Global Biogeochemical Cycles 32 , pp. 389-416.

Cao, X., Mulholland, M. R., Helms, J. R.., Bernhardt, P. W.., Duan, P., Mao, J. and Schmidt-Rohr, K. (2017). A major step in opening the black box of high-molecular-weight dissolved organic nitrogen by isotopic labeling of synechococcus and multibond two-dimensional NMR. Analytical Chemistry , pp. 9.

Jayakumar, A., Chang, B. X., Widner, B., Bernhardt, P., Mulholland, M. R. and Ward, B. B. (2017). Biological nitrogen fixation in the oxygen-minimum region of the eastern tropical North Pacific Ocean. ISME Journal 11 (10) , pp. 2356-2367.

Widner, B., Mordy, C. and Mulholland, M. R. (2017). Cyanate distribution and uptake above and within the Eastern Tropical South Pacific oxygen deficient zone. Limnology and Oceanography 63 , pp. S177-S192.

Widner, B. and Mulholland, M. R. (2017). Cyanate distribution and uptake in north Atlantic coastal waters. Limnology & Oceanography 62 (6) , pp. 2538-2549.

Tang, T., Filippino, K. C., Liu, Z., Mulholland, M. R. and Lee, C. (2017). Peptide hydrolysis and uptake of peptide hydrolysis products in the james river estuary and lower Chesapeake bay. Marine Chemistry 197 , pp. 52-63.

Sipler, R. E., Gong, D., Baer, S. E., Sanderson, M. P., Roberts, Q. N., Mulholland, M. R. and Bronk, D. A. (2017). Preliminary estimates of the contribution of Arctic nitrogen fixation to the global nitrogen budget. Limnol. Oceanogr. Letters.

Filippino, K. C., Egerton, T. A., Hunley, W. S. and Mulholland, M. R. (2017). The influence of storms on water quality and phytoplankton dynamics in the tidal James River. Estuaries and Coasts 40 , pp. 80-94.

Hu, Z., Mulholland, M. R., Xu, N. and Duan, S. (2016). Effects of temperature, irradiance and pCO2 on the growth of Prorocentrum donghaiense. Aquat. Microb. Ecol. 77 , pp. 155-166.

Rahay, E., Shun-Yan, C., Cui, G., Liu, H., Tsagaraki, T. M., Giannakourou, A., Tsiola, A., Pssara, S., Lagaria, A., Mulholland, M. R., Stathopoulou, E., Pitta, P., Herut, B. and Berman-Frank, I. (2016). Evaluating the impact of atmospheric depositions on springtime dinitrogen fixation in the Cretan Sea (Eastern Mediterranean) - A mesocosm approach. Frontiers in Marine Science 3 , pp. 180.

Widner, B. N., Mulholland, M. R. and Mopper, K. (2016). New insights into the marine nitrogen cycle: The role of cyanate. Environmental Science and Technology Letters.

Rahav, E., Herut, B., Mulholland, M. R., Belkin, N., Elifantz, H. and Berman-Frank, I. (2015). Heterotrophic and autotrophic contribution to dinitrogen fixation in the Gulf of Aqaba. Marine Ecology Progress Series (522) , pp. 67-77.

Glavovic, B. C., Limburg, K., Liu, K. K., Emeis, K. C., Thomas, H., Kremer, H., Avril, B., Zhang, J., Mulholland, M. R., Glaser, M. and Swaney, D. P. (2015). Living on the margin in the Anthropocene: Engagement arenas for sustainability research and action at the ocean-land interface. Current Opinion in Environmental Sustainability 2015.

Filippino, K. C., Mulholland, M. R. and Bott, C. B. (2015). Phycoremediation strategies for rapid tertiary nutrient removal in a waste stream. Algal Research 11 , pp. 125-133.

Wong, G. T., Ku, T. L., Liu, H. and Mulholland, M. R. (2015). The oceanography of the Northern South China Sea Shelf-Sea (NoSoCS) and its adjacent waters – overview and highlights. Deep-Sea Res. II 117 , pp. 3-9.

Heil, C. A.., Dixon, L. K.., Hall, E., Garrett, M., Lenes, J. M.., O'Neil, J. M.., Walsh, B. M.., Bronk, D. A.., Killberg-Thoreson, L., Hitchcock, G. L.., Meyer, K. A.., Mulholland, M. R., Procise, L., Kirkpatrick, G. J.., Walsh, J. J.. and Weisberg, R. W.. (2014). Blooms of Karenia brevis (Davis) G. Hansen & Ø. Moestrup on the West Florida Shelf: Nutrient sources and potential management strategies based on a multi-year regional study. Harmful Algae 38 , pp. 127-140.

Mulholland, M. R., Bernhardt, P. W., Ozmon, I., Procise, L. A., Garrett, M., O'Neil, J. M., Heil, C. A. and Bronk, D. A. (2014). Contribution of diazotrophy to nitrogen inputs supporting Karenia brevis blooms in the Gulf of Mexico. Harmful Algae 38 , pp. 20-29.

Morse, R. E., Mulholland, M. R., Egerton, T. E. and Marshall, H. G. (2014). Daily variability in phytoplankton abundance and nutrient concentrations in a tidally dominated eutrophic estuary. Mar. Ecol. Prog. Ser. 503 , pp. 59-74.

Hu, Z., Xu, N., Duan, S. and Mulholland, M. R. (2014). Growth and nitrogen uptake kinetics for Prorocentrum donghaiense acclimated to different nitrogen sources. PLOS ONE 9 (4) , pp. e94030.

Heil, C. A., Bronk, D. A., Mulholland, M. R., O'Neil, J. M., Bernhardt, P. W., Murasko, S., Havens, J. A. and Vargo, G. A. (2014). Influence of daylight surface aggregation behavior on nutrient cycling during a Karenia brevis (Davis) G. Hansen & Mo´ estrup bloom: Migration to the surface as a nutrient acquisition strategy. Harmful Algae (38) , pp. 86-94.

Boneillo, G. E. and Mulholland, M. R. (2014). Interannual differences in nutrient dynamics during brown tide (Aureococcus anophagefferens) blooms in a coastal embayment. Estuaries and Coasts 37 , pp. S147-S163.

Bronk, D. A., Killberg-Thoreson, L., Sipler, R. E., Mulholland, M. R., Roberts, Q. N., Bernhardt, P. W., Garrett, M., O'Neil, J. M. and Heil, C. A. (2014). Nitrogen uptake and regeneration (ammonium regeneration, nitrification and photoproduction) in waters of the West Florida Shelf prone to blooms of Karenia brevis. Harmful Algae 38 , pp. 50-62.

Killerg-Thoreson, L., Mulholland, M. R., Heil, C. A.., Sanderson, M. P.., O'Neil, J. M.. and Bronk, D. A.. (2014). Nitrogen uptake kinetics in field populations and cultured strains of Karenia brevis. Harmful Algae (38) , pp. 73-85.

Harding, L. W., Batiuk Jr, R. A., Fisher, T. R., Gallegos, C. L., Malone, T. C., Miller, W. D., Mulholland, M. R., Paerl, H., Perry, E. S. and Tango, P. (2014). Scientific bases for numerical chlorophyll criteria in Chesapeake Bay. Estuaries and Coasts 37 , pp. 134-148.

Egerton, T. A., Morse, R. E., Marshall, H. G. and Mulholland, M. R. (2014). The effects of short-term variability in water quality on phytoplankton abundance, diversity, and community composition in a tidal estuar. Microorganisms 2 , pp. 33-57.

Heil, C. A., Bronk, D. A., Dixon, L. K., Hitchcock, G. L., Kirkpatrick, G. J., Mulholland, M. R., O'Neil, J. M., Walsh, J. J., Weisberg, R. W. and Garrett, M. (2014). The Gulf of Mexico ECOHAB: Karenia Program 2006–2012. Harmful Algae 38 , pp. 3-7.

Garcia, N. S.., Fu, F. X.., Breene, C. L.., Yu, E. K.., Bernhardt, P. W.. and Mulholland, M. R. (2013). Combined effects CO2 and light on large and small isolates of the unicellular N2-fixing cyanobacterium Crocosphaera watsonii from the western tropical Atlantic Ocean. European Journal of Phycology 48 , pp. 128-139.

Rahav, E., Herut, B., Mulholland, M. R., Voß, B., Stazic, D., Steglich, C., Hess, W. R. and Berman-Frank, I. (2013). Contribution of dinitrogen fixation to bacterial and primary productivity in the Gulf of Aqaba (Red Sea). Biogeosciences 10 , pp. 10327-10361.

Morse, R. E., Mulholland, M. R., Hunley, W. S., Fentress, S., Wiggins, M. and Blanco-Garcia, J. L. (2013). Controls on the initiation and development of blooms of the dinoflagellate Cochlodinium polykrikoides Margalef in lower Chesapeake Bay and its tributaries. Harmful Algae 28 , pp. 71-82.

Widner, B., Mulholland, M. R. and Mopper, K. (2013). Determination of nanomolar cyanate concentrations in estuarine and sea waters by precolumn fluorescence derivatization. Analytical Chemistry 85 , pp. 6661-6666.

Rahav, E., Bar-Zeev, E., Ohayion, S., Elifantz, H., Belkin, N., Herut, B., Mulholland, M. R. and Berman-Frank, I. (2013). Dinitrogen fixation in aphotic oxygenated marine environments. Frontiers in Microbiology 4.

Boyd, P. W.., Fu, F., Hayashi, K., Hu, Z., Hutchins, D. A.., Kudela, R. M.., Litchman, E., Mulholland, M. R., Passow, U., Rynearson, T. A.., Strzepek, R. S.., Thomas, M. K.., Whittaker, K. A.. and Yu, E. (2013). Marine phytoplankton temperature versus growth curves from polar to tropical waters – Outcome of a scientific community-wide study. PLOS Biology .

Rahav, E., Herut, B., Levi, A., Mulholland, M. R. and Berman-Frank, I. (2013). Springtime contribution of dinitrogen fixation to primary production across the Mediterranean Sea. Ocean Science.

Rahav, E., Barak, H., Noga, S., Edo, B. Z., Mulholland, M. R. and Berman-Frank, I. (2013). Uncoupling between dinitrogen fixation and primary productivity in the eastern Mediterranean Sea. J. Geophys. Res.:Biogeosciences 118 , pp. 195-202.

Jayakumar, A. M., Al-Rshaidat, M., Ward, B. B. and Mulholland, M. R. (2012). Diversity and distribution of diazotrophs in the Arabian Sea oxygen minimum zone. FEMS Microbiology Ecology 82 , pp. 597-606.

Hu, Z., Mulholland, M. R., Duan, S. and Xu, N. (2012). Effect of nitrogen supply and its composition on the growth of Prorocentrum donghaiense. Harmful Algae 13 , pp. 72-82.

Garcia, N. S., Fu, F. X., Breene, C. L., Bernhardt, p. W., Mulholland, M. R., Sohm, J. A. and Hutchins, D. A. (2012). Interactive effects of irradiance and CO2 on carbon and dinitrogen fixation in the diazotrophic marine cyanobacterium Trichodesmium erythraeum (Cyanobacterium). J. Phycol. 47 , pp. 1292-1303.

Mulholland, M. R., Bernhardt, P. W., Blanco-Garcia, J. L., Mannino, A., Hyde, K., Mondragon, E., Turk, K., Moisander, P. H. and Zehr, J. P. (2012). Rates of dinitrogen fixation and the abundance of diazotrophs in North American coastal waters between Cape Hatteras and Georges Bank. Limnol. Oceanogr 57 , pp. 1067-1083.

Gobler, C. J., Burson, A., Koch, F., Tang, Y. and Mulholland, M. R. (2012). The role of nitrogenous nutrients in the occurrence of harmful algal blooms caused by Cochlodinium polykrikoides in New York estuaries (USA. Harmful Algae 17 , pp. 64-74.

Filippino, K. C., Mulholland, M. R., Bernhardt, P. W., Love, N. G., Canuel, E., Sanderson, M. and Bronk, D. A. (2011). Bioavailability of effluent-derived organic nitrogen to resident microbial communities along a natural estuarine salinity gradient. Estuaries and Coasts 34 , pp. 269-280.

Morse, R. E., Shen, J., Blanco-Garcia, J. L., Hunley, W. S., Fentress, S., Wiggins, M. and Mulholland, M. R. (2011). Environmental and physical controls on the formation and transport of blooms of the dinoflagellate Cochlodinium polykrikoides Margalef in lower Chesapeake Bay and its tributaries. Estuaries and Coasts 34 , pp. 1006-1025.

Yogev, T., Eyal, R., Bar Zeev, E., Aharonovich, D., Kress, N., Béjà, O., Mulholland, M. R., Herut, B. and Berman-Frank, I. (2011). Is dinitrogen fixation significant in the Levantine Basin, East Mediterranean Sea?. Environmental Microbiology.

Filippino, K. C., Mulholland, M. R. and Bernhardt, P. W. (2011). Nitrogen uptake and primary productivity rates in the Mid-Atlantic Bight (MAB). Estuarine, Coastal, and Shelf Science 91 , pp. 13-23.

Mesfioui, R., Love, N. G., Bronk, D. A., Mulholland, M. R. and Hatcher, P. G. (2011). Reactivity and chemical characterization of effluent organic nitrogen from wastewater treatment plants determined by Fourier transform ion cyclotron resonance mass spectrometry. Water Research 46 , pp. 622-634.

Pan, X., Mannino, A., Russ, M. E., Filippino, K. C. and Mulholland, M. R. (2011). Remote sensing of phytoplankton community composition along the North American Middle Atlantic Bight continental shelf. Remote Sensing of Environment 115 , pp. 3731-3747.

Mulholland, M. R., Rocha, A. and Boneillo, G. (2011). Thymidine and leucine incorporation by phytoplankton: implications for bacterial productivity estimates in coastal waters. Estuaries and Coasts 34 , pp. 310-325.

Bronk, D. A., Roberts, Q. N., Sanderson, M. P., Canuel, E. A., Hatcher, P. G., Mesfioui, R., Filippino, K. C., Mulholland, M. R. and Love, N. G. (2010). Effluent Organic Nitrogen (EON): Bioavailability and Photochemical and Salinity Release. Environmental Science and Technology 44 , pp. 5830-5835.

Najjar, R., Pyke, C. R., Adams, M. B., Breitburg, D., Hershner, C., Kemp, M. W., Howarth, R., Mulholland, M. R., Paolisso, M., Secor, D., Sellner, K., Wardrop, D. and Wood, R. (2010). Potential climate-change impacts on the Chesapeake Bay.. Estuarine, Coastal and Shelf Science 86 , pp. 1-20.

Liu, Z., Kobiela, M. E., McKee, G. A., Tang, T., Lee, C., Mulholland, M. R. and Hatcher, P. G. (2010). The effect of chemical structure on the hydrolysis of tetrapeptides along a river-to-ocean transect: AVFA and SWGA. Marine Chemistry 119 , pp. 108-120.

Mulholland, M. R., Boneillo, G. E., Bernhardt, P. W. and Minor, E. C. (2009). Comparison of nutrient and microbial dynamics over a seasonal cycle in a mid-Atlantic coastal lagoon prone to Aureococcus anophagefferens (brown tide) blooms. Estuaries and Coasts 32 , pp. 1176-1194.

Hutchins, D. A., Mulholland, M. R. and Fu, F. (2009). Nutrient cycles and marine microbes in a CO2-enriched ocean. Oceanography 22 , pp. 88-105.

Filippino, K. C., Bernhardt, P. W. and Mulholland, M. R. (2009). Nutrient dynamics and primary productivity in the Chesapeake Bay outflow plume during 2005 and 2006. Estuaries and Coasts 32 , pp. 410-424.

Mulholland, M. R. and Lee, C. (2009). Peptide hydrolysis and dipeptide uptake in cultures and natural communities dominated by phytoplankton mixotrophs. Limnol. Oceanogr 54 , pp. 856-868.

Mulholland, M. R., Morse, R. E., Boneillo, G. E., Bernhardt, P. W., Filippino, K. C., Procise, L. A., Blanco-Garcia, J. L., Marshall, H. G., Egerton, T. A., Hunley, W. S., Moore, K. A., Berry, D. L. and Gobler, C. J. (2009). Understanding causes and impacts of the dinoflagellate, Cochlodinium polykrikoides, blooms in the Chesapeake Bay. Estuaries and Coasts 32 , pp. 734-747.

Fu, F. X., Mulholland, M. R., Garcia, N., Beck, A., Bernhardt, P. W., Warner, M. E., Sañudo-Wilhelmy, S. A. and Hutchins, D. A. (2008). Interactions between changing pCO2, N2 fixation, and Fe limitation in the marine unicellular cyanobacterium Crocosphaera. Limnol. Oceanogr 53 , pp. 2472-2484.

Hutchins, D. A., Fu, F. X., Zhang, Y., Warner, M. E., Feng, Y., Portune, K., Bernhardt, P. W. and Mulholland, M. R. (2007). CO2 control of Trichodesmium N2 fixation, photosynthesis, growth rates and elemental ratios: Implications for past, present and future ocean biogeochemistry. Limnol. Oceanogr 52 , pp. 1293-1304.

Mulholland, M. R. (2007). The fate of nitrogen fixed by diazotrophs in the ocean. Biogeosciences 4 , pp. 37-51.

Wong, G. T., Ku, T. L., Mulholland, M. R., Tseng, C. M. and Wang, D. P. (2007). The South East Asian Time-series Study (SEATS) and the biogeochemistry of the South China Sea – An Overview. Deep-Sea Res. II 54 , pp. 1434-1447.

Mulholland, M. R., Heil, C. A., Bronk, D. A., O'Neil, J. M. and Bernhardt, P. W. (2006). Nitrogen fixation and regeneration in the Gulf of Mexico. Limnol. Oceanogr 51 , pp. 1762-1776.

Minor, E. C., Simjouw, J. P. and Mulholland, M. R. (2006). Seasonal variations in dissolved organic carbon concentrations and characteristics in a shallow coastal bay. Marine Chemistry 101 , pp. 166-179.

Mulholland, M. R. and Bernhardt, P. W. (2005). The effect of growth rate, phosphorus concentration and temperature on N2 fixation and N regeneration rates in continuous cultures of Trichodesmium IMS101. Limnol. Oceanogr 50 (3) , pp. 839-849.

Mulholland, M. R., Heil, C. A. and Minor, E. C. (2004). A comparison of N and C uptake during brown tide (Aureococcus anophagefferens) blooms from two coastal bays on the east coast of the USA. Harmful Algae 3 , pp. 361-376.

Lin, S., Mulholland, M. R., Zhang, H., Feinstein, T. N., Jochem, F. J. and Carpenter, E. J. (2004). Intense grazing and prey-dependent growth of Pfiesteria piscicida (Dinophyceae). J. Phycol. 40 , pp. 1062-1073.

Simjouw, J. P., Mulholland, M. R. and Minor, E. C. (2004). Molecular-level characteristics of dissolved organic matter in Chincoteague Bay prior to and during an Aureococcus anophagefferens bloom. Estuaries 27 (6) , pp. 986-998.

Mulholland, M. R., Bronk, D. A. and Capone, D. G. (2004). N2 fixation and regeneration of NH4+ and dissolved organic N by Trichodesmium IMS101. Aquat. Microb. Ecol. 37 , pp. 85-94.

Mulholland, M. R., Glibert, P. M. and Lee, C. (2003). Peptide hydrolysis, amino acid oxidation and N uptake along a nutrient and salinity gradient in the Pocomoke River, Maryland. Mar. Ecol. Prog. Ser. 258 , pp. 3-17.

Mulholland, M. R., Floge, S., Carpenter, E. J. and Capone, D. G. (2002). Alkaline phosphatase activity in relation to phosphorous nutrition in cultures and natural populations of Trichodesmium. Mar. Ecol. Prog. Ser. 239 , pp. 45-55.

Mulholland, M. R., Gobler, C. J. and Lee, C. (2002). Peptide hydrolysis, amino acid oxidation and N uptake in communities seasonally dominated by Aureococcus anophagefferens. Limnol. Oceanogr 47 , pp. 1094-1108.

Mulholland, M. R., Ohki, K. and Capone, D. G. (2001). Nutrient controls on nitrogen uptake and metabolism by natural populations and cultures of Trichodesmium (Cyanobacteria). J. Phycol. 37 , pp. 1001-1009.

Mulholland, M. R. and Capone, D. G. (2001). The stoichiometry of N and C utilization in cultured populations of Trichodesmium IMS101. Limnol. Oceanogr 46 , pp. 436-443.

Dupouy, C., Neveux, J., Subramaniam, A., Mulholland, M. R., Montoya, J. P., Campbell, L., Capone, D. G. and Carpenter, E. J. (2000). Satellite captures Trichodesmium blooms in the Southwestern Tropical Pacific. EOS 81 , pp. 13-16.

Mulholland, M. R. and Capone, D. G. (2000). The physiology of the marine N2 fixing cyanobacteria Trichodesmium. Trends in Plant Science 5 , pp. 148-153.

Carpenter, E. J., Montoya, J. P., Burns, J. and Mulholland, M. R. (1999). Extensive bloom of a N2-fixing symbiotic association in the tropical Atlantic Ocean. Mar. Ecol. Prog. Ser. 185 , pp. 273-283.

Mulholland, M. R. and Capone, D. G. (1999). Nitrogen fixation, uptake and metabolism in natural and cultured populations of Trichodesmium spp. Mar. Ecol. Prog. Ser. 188 , pp. 33-49.

Mulholland, M. R., Ohki, K. and Capone, D. G. (1999). Nitrogen utilization and metabolism relative to patterns of N2 fixation cultures of Trichodesmium NIBB1067. J. Phycol. 35 , pp. 977-988.

Mulholland, M. R., Shoemaker, C., Ohki, K. and Capone, D. G. (1999). Utilization of combined forms of N in cultures and field populations of Trichodesmium. Pp. 279-286. In: Marine cyanobacteria, Charpy L & Larkum AWD (eds). Bulletin de l'Institut Océanographique 19.

Mulholland, M. R., Gilbert, P. M., Berg, G. M., Van Heukelem, L., Pantoja, S. and Lee, C. (1998). Extracellular amino acid oxidation by phytoplankton and cyanobacteria: a cross-ecosystem comparison. Aquatic Microbial Ecology 15 (2) , pp. 141-152.

Miller, C. A., Gilbert, P. M., Berg, G. M. and Mulholland, M. R. (1997). Effects of grazer and substrate amendments on nutrient and plankton dynamics in estuarine enclosures. Aquatic Microbial Ecology 12 , pp. 251-261.

Conference Proceeding

Mulholland, M. R. and Capone, D. G. (2009). Dinitrogen Fixation in the Indian Ocean Indian Ocean Biogeochemical Processes and Ecological Variability (pp. 167-186) Washington D.C: AGU Geophysical Monograph Series 185.

(2006). New Nitrogen Sources in the Gulf of Aqaba, Red Sea; Estimates from DINex Fall Meet. Suppl. (pp. Abstract B23F-06) San Francisco, CA: Eos Trans. AGU.

Presentations

McGill, S., Hale, R. and Mulholland, M. R. ( 2018). Sediment Resuspension and its possible link to harmful algal bloom initiation in a shallow microtidal estuary. Oral Presentation American Geophysical Union Washington, D.C.

Macias Tapia, A., Mulholland, M. R. and Loftis, D. ( 2018). Water quality impacts from tidal flooding in the Southern Chesapeake Bay. Oral Presentation American Geophysical Union meeting Washington, D.C.

Mulholland, M. R., Echevarria, M., Bernhardt, P. W., Filippino, K. C., Blumen, L., Macias Tapia, A., Perez Vega, E. and Flefel, I. (December 10, 2018). Water quality impairments in the lower Chesapeake Bay: hot spots and hot times. Oral Presentation American Geophysical Union meeting Washington, D.C.

Fuchsman, C. A., Palevsky, H. I., Widner, B., Carlson, M. C., Neibauer, J. A., Mulholland, M. R., Keil, R., Devol, A. and Rocap, G. (February 12, 2018). Cyanobacteria fuel nitrogen loss in an oligotrophic oxygen deficient zone. Oral Presentation ASLO/AGU Ocean Sciences Meeting Portland, OR.

Mannino, A., Novak, M., Salisbury, J., Kim, W., Tzortziou, M. and Mulholland, M. R. (February 12, 2018). Diurnal variability in optical properties and carbon stocks as indicators of biogeochemical cycling. Oral Presentation ASLO/AGU Ocean Sciences Meeting Portland, OR.

Blumen, L. M. and Mulholland, M. R. (February 12, 2018). Micromixoplankton grazing measurements in the Lafayette River during a bloom. Oral Presentation ASLO/AGU Ocean Sciences Meeting Portland, OR.

Mulholland, M. R., Bernhardt, P. W., Hyde, K., Mannino, A., Widner, B., Chappell, D. and Selden, C. (February 12, 2018). Primary productivity and dinitrogen fixation on the North Atlantic continental shelf. Oral Presentation ASLO/AGU Ocean Sciences Meeting Portland, OR.

Selden, C. D., Chappell, D., Widner, B., Tapia, A. M., Bernhardt, P. W. and Mulholland, M. R. (February 12, 2018). Reconsidering coastal diazotrophy in the North Atlantic: High rates of N2 fixation along the U. S. Southeastern seaboard. Oral Presentation ASLO/AGU Ocean Sciences Meeting Portland, OR.

Hummel, M., McMahon, R., Harvey, H. R. and Mulholland, M. R. (February 12, 2018). Synthesis and cellular distribution of the neurotoxin β-N-methylamino-L-alanine (BMAA) by three cyanobacterial species under varying environmental conditions. Oral Presentation ASLO/AGU Ocean Sciences Meeting Portland, OR.

Widner, B., Macias Tapia, A., Ji, Z., Bernhardt, P. W., Jayakumar, A. and Mulholland, M. R. (July 24, 2017). Uptake and dissimilatory utilization of simple organic nitrogen compounds in the Eastern Tropical Pacific oxygen deficient zone. Oral Presentation Gorgon Research Conference Holderness, NH.

Jayakumar, A., Chang, B. X., Mulholland, M. R. and Ward, B. B. (February 27, 2017). Abundance, diversity and activities of diazotrophs in oxygen deficient waters. Oral Presentation ASLO Ocean Sciences meeting Honolulu, HI.

Mulholland, M. R., Widner, B., Bernhardt, P. W., Jayakumar, A. and Chang, B. (February 27, 2017). Dinitrogen fixation within and adjacent to oxygen deficient waters of the Eastern Tropical South Pacific Ocean. Oral Presentation ASLO Ocean Sciences meeting Honolulu, HI.

Selden, C. R., Mulholland, M. R., Widner, B., Bernhardt, P. W., Macias Tapia, A. and Jayakumar, A. (February 27, 2017). Significance of anoxic and aphotic diazotrophy in the Eastern Tropical North Pacific oxygen deficient zone. Oral Presentation ASLO Ocean Sciences meeting Honolulu, HI.

Bernhardt, P. W., Mulholland, M. R., Widner, B., Sookhdeo, C., Sedwick, P., St.-Laurent, P., Friedichs, M., Hermann, M., Najjar, R. and Sohst, B. (February 27, 2017). The effect of atmospheric nitrogen deposition on primary productivity and nitrogen uptake in seasonally oligotrophic waters off the eastern United States. Oral Presentation ASLO Ocean Sciences meeting Honolulu, HI.

Widner, B., Macias Tapia, A., Ji, Z., Bernhardt, P. W., Jayakumar, A. and Mulholland, M. R. (February 27, 2017). Uptake and dissimilatory utilization (N loss) of simple organic N compounds in the Eastern Tropical Pacific oxygen deficient zones. Oral Presentation ASLO Ocean Sciences meeting Honolulu, HI.

Sookhdeo, C., Bernhardt, P. W., Mendonca, I., Mulholland, M. R., Najjar, R., Sohst, B., Schwarzchild, A., Widner, B. and Sedwick, P. (February 22, 2017). Estimating Wet Deposition of Nutrients to Seasonally Oligotrophic waters off the U.S. East Coast using a Coastal Sampling Station. Oral Presentation ASLO Aquatic Sciences meeting Granada, Spain .

Price, L. M. and Mulholland, M. R. ( 2016). Method of measuring dinoflagellate grazing on flagellate and bacteria communities. Oral Presentation ASLO-AGU Ocean Sciences meeting New Orleans, LA.

Selden, C. R., Mulholland, M. R., Widner, B., Bernhardt, P. W., Macias Tapia, A. and Jayakumar, A. (December 12, 2016). Distribution and magnitude of dinitrogen fixation in the Eastern Tropical North Pacific oxygen deficient zone. Oral Presentation AGU Fall Meeting San Francisco, CA.

Jayakumar, A., Mulholland, M. R., Chang, B. X. and Ward, B. B. (December 2, 2016). Diversity, distribution and gene expression of diazotrophs (nifH) in oxygen deficient waters. Oral Presentation SCOR WG144 meeting and International Symposium on Microbial Responses to Ocean Deoxygenation, CSIR-NIO Goa, India.

Widner, B. N., Fuchsman, C., Babbin, A. R., Ji, Z. and Mulholland, M. R. (February 21, 2016). A Novel anoxic pathway for urea and cyanate in marine oxygen deficient zones revealed by combined microbiological and biogeochemical tools. Oral Presentation ASLO-AGU Ocean Sciences meeting New Orleans, LA.

Sedwick, P., Mulholland, M. R., Najjar, R., Bernhardt, P. W., Price, L. M., Sohst, B. M., Sookhdeo, C. and Widner, B. (February 21, 2016). Assessing the Roles of Iron, Macronutrients and Wet deposition in Controlling Phytoplankton Growth in Seasonally Oligotrophic Waters of the Mid-Atlantic Bight. Oral Presentation ASLO-AGU Ocean Sciences meeting New Orleans, LA.

Mulholland, M. R., Widner, B., Bernhardt, P. W., Jayakumar, A. and Chang, B. (February 21, 2016). Dinitrogen fixation within and adjacent to oxygen deficient waters of the Eastern Tropical South Pacific Ocean. Oral Presentation ASLO-AGU Ocean Sciences meeting New Orleans, LA.

Mannino, A., Novak, M., Tzortziou, M., Salisbury, J. and Mulholland, M. R. (February 21, 2016). Diurnal variability in carbon and nitrogen pools within Chesapeake Bay and northern gulf of Mexico: implications for future ocean color satellite sensors. Oral Presentation ASLO-AGU Ocean Sciences meeting New Orleans, LA.

Echevarria, M., Mulholland, M. R., Filippino, K. C. and Egerton, T. (February 21, 2016). Inter and intra-annual dynamics of dinoflagellate bloom species in the James River, an urban tidal estuary in Virginia, USA. Oral Presentation ASLO-AGU Ocean Sciences meeting New Orleans, LA.

Widner, B., Mopper, K. and Mulholland, M. R. (July 26, 2015). New insights into reduced nitrogen: the role of cyanate in the marine nitrogen cycle. Oral Presentation Chemical Oceanography Gordon Research Conference Holderness, NH.

Chang, B. X., Widner, B., Bernhardt, P. W. and Mulholland, M. R. (July 26, 2015). Nitrogen Fixation in the Eastern Tropical Pacific Oxygen Deficient Zones. Oral Presentation Chemical Oceanography Gordon Research Conference Holderness, NH.

Mulholland, M. R. (May 30, 2015). Blooming Microbes. ASM 2015 General Meeting .

Reece, K. S., Vogelbein, W. K., Egerton, T. and Mulholland, M. R. (May 30, 2015). Historic and Emerging Patterns of Microalgal Blooms in Chesapeake Bay. Oral Presentation ASM meeting New Orleans, LA.

Egerton, T. A., Reece, K., Semcheski, M., Filippino, K. C., Vogelbein, W. and Mulholland, M. R. (March 12, 2015). Expansion and toxicity of Cochlodinium polykrikoides and Alexandrium monilatum harmful algal blooms in Chesapeake Bay. Oral Presentation AERS meeting South Carolina.

Sedwick, P., Bernhardt, P., Kernisan, C., Mendonca, I., Mulholland, M. R., Najjar, R., Price, L., Sohst, B., Sookhdeo, C. and Widner, B. (February , 2015). Biological impact of wet deposition to seasonally oligotrophic waters off the U. S. Eastern Seaboard. Oral Presentation ASLO Aquatic Sciences meeting Granada, Spain .

Widner, B. A.., Mulholland, M. R., Mopper, K. and Post, A. (February , 2015). Combined biogeochemical and microbiological tools reveal cyanate to be a novel nitrogen source for marine phytoplankton. Oral Presentation ASLO Aquatic Sciences meeting Granada, Spain .

Sedwick, P., Bernhardt, P. W., Kernisan, C., Mendonca, I., Mulholland, M. R., Najjar, R., Price, L., Sohst, B., Sookhdeo, C. and Widner, B. (February 22, 2015). Biological impact of wet deposition to seasonally oligotrophic waters off the U. S. Eastern Seaboard. Oral Presentation ASLO Aquatic Sciences meeting Granada, Spain .

Widner, B., Post, A. F., Mopper, K. and Mulholland, M. R. (February 22, 2015). Combined biogeochemical and microbiological tools reveal cyanate to be a novel nitrogen source for marine phytoplankton. Oral Presentation ASLO Aquatic Sciences meeting Granada, Spain .

Mulholland, M. R., Widner, B. N., Bernhardt, P. W., Jayakumar, A. and Chang, B. (February 22, 2015). Dinitrogen fixation in oxygen deficient waters of the Eastern Tropical South Pacific Ocean. Oral Presentation ASLO Aquatic Sciences meeting Granada, Spain .

Filippino, K. C., Egerton, T. A., Hunley, W. S., Shen, J. and Mulholland, M. R. (February 22, 2015). Drivers of interannual variability of Cochlodinium polykrikoides blooms in a coastal urban estuary. Oral Presentation ASLO Aquatic Sciences meeting Granada, Spain .

Ellis, L. S., Carroll, K. R., Filippino, K. C., Bernhardt, P. W. and Mulholland, M. R. (February 22, 2015). Impacts of Storms on Phytoplankton Growth and Productivity. Oral Presentation ASLO Aquatic Sciences meeting Granada, Spain .

Price, L., Filippino, K. C. and Mulholland, M. R. (February 22, 2015). The Lafayette River: The species succession of phytoplankton communities in correlation to environmental and physical triggers. Lecture ASLO Aquatic Sciences meeting Granada, Spain .

Bernhardt, P. W., Mulholland, M. R., Mannino, A. and Hyde, K. (February 23, 2014). Impacts of climate variability on primary production in the Middle Atlantic Bight and Gulf of Maine. Oral Presentation ASLO/AGU Ocean Sciences meeting Honolulu, HI.

Widner, B., Mulholland, M. R. and Mopper, K. (February 23, 2014). New insights into reduced nitrogen: the role of cyanate in the marine nitrogen cycle. Oral Presentation ASLO/AGU Ocean Sciences meeting Honolulu, HI.

Chang, B. X., Widner, B., Bernhardt, P. W., Jayakumar, A., Ward, B. B. and Mulholland, M. R. (February 23, 2014). Nitrogen fixation in the Eastern Tropical Pacific oxygen minimum zones. Oral Presentation ASLO/AGU Ocean Sciences meeting Honolulu, HI.

Mulholland, M. R., Bernhardt, P. W., Mannino, A. and Hyde, K. (February 23, 2014). Seasonal and interannual variability in nitrogen utilization in the Middle Atlantic Bight and Gulf of Maine. Oral Presentation ASLO/AGU Ocean Sciences meeting Honolulu, HI.

Staryk, C., Mulholland, M. R. and Bernhardt, P. W. (February 23, 2014). Seasonal Variability of net community metabolism on the Eastern North American Continental Shelf (Mid-Atlantic Bight, George’s Bank, and Gulf of Maine). Oral Presentation ASLO/AGU Ocean Sciences meeting Honolulu, HI.

Widner, B., Mulholland, M. R., Bernhardt, P. W. and Mopper, K. (February 17, 2013). Distribution and uptake of cyanate in the Eastern Tropical North Pacific. Oral Presentation ASLO Aquatic Sciences meeting New Orleans, LA.

Mulholland, M. R., Chang, B., Jayakumar, A., Ward, B., Widner, B. and Bernhardt, P. W. (February 17, 2013). Distribution and uptake of cyanate in the Eastern Tropical North Pacific. Oral Presentation ASLO Aquatic Sciences meeting New Orleans, LA.

Lenes, J. M., Heil, C. A., O'Neil, J. M., Bronk, D. A., Mulholland, M. R., Virani, J. I. and Bryrne, R. H. (February 8, 2013). In situ Evidence of Photolysis of Refractory Iron. Poster 2003 American Society of Limnology and Oceanography (ASLO) Meeting Salt Lake City, UT.

Filippino, K. C., Mulholland, M. R., Bott, C., Katehis, D. and Wilson, C. (January , 2013). Bioreactors – A Cost-effective Approach for Enhanced Nutrient Removal. Oral Presentation WERF Forum Chicago, IL.

Mulholland, M. R., Bernhardt, P. W., Staryk, C. J., Mannino, A. and Hyde, K. (January 24, 2013). Primary productivity, dinitrogen fixation, and nitrogen uptake on the North Atlantic continental shelf. Oral Presentation IMBIZO III Gao, India.

Filippino, K. C., Morse, R. E., Egerton, T. and Mulholland, M. R. ( 2012). Storm chasing: Nutrient dynamics in the tidal James River before, during, and after Hurricane Irene and Tropical Storm Lee. Oral Presentation OCEANS12 meeting Norfolk, VA.

Filippino, K. C., Schweitzer, C., Mulholland, M. R. and Bott, C. B. ( 2012). Phycoremediation strategies for rapid nutrient removal in a wastestream. Oral Presentation WEFTEC 2012 .

Jayakumar, A. M., Al-Rshaidat, M. D., Ward, B. B. and Mulholland, M. R. (February , 2012). Diversity, distribution and expression of diazotrophs (nifH) in oxygen deficient waters of the Arabian Sea. Oral Presentation American Society for Microbiology .

Widner, B., Mopper, K., Filippino, K. C., Morse, R., Bernhardt, P. W. and Mulholland, M. R. (February 20, 2012). A Method for Cyanate Detection in Seawater. Oral Presentation AGU/ASLO 2012 Ocean Sciences meeting Salt Lake City, Utah.

Procise, L. and Mulholland, M. R. (February 20, 2012). Autotrophic, osmotrophic, phagotrophic carbon uptake by the red-tide dinoflagellate Karenia brevis. Oral Presentation AGU/ASLO 2012 Ocean Sciences meeting Salt Lake City, UT.

Bronk, D. A., Sipler, R. E., Killberg-Thoreson, L., Sanderson, M. P., Roberts, Q. N. and Mulholland, M. R. (February 20, 2012). Nitrogen fixation - a new source of nitrogen in the changing western Arctic? Oral Presentation AGU/ASLO 2012 Ocean Sciences meeting Salt Lake City, UT.

Garcia, N. S., Fu, F. X., Yu, E. K., Breene, C. L., Bernhardt, P. W., Mulholland, M. R., Sohm, A., Webb, A. and Hutchins, D. A. (February 20, 2012). Responses of marine N2 fixation to interactive global change effects: Trichodesmium and Crocosphaera compared and contrasted. Oral Presentation AGU/ASLO 2012 Ocean Sciences meeting Salt Lake City, UT.

Mulholland, M. R., Bernhardt, P. W., Staryk, C. J., Mannino, A. and Hyde, K. (February 20, 2012). Seasonal and interannual variability in primary productivity and N uptake along the northeastern U.S. continental margin. Oral Presentation AGU/ASLO 2012 Ocean Sciences meeting Salt Lake City, UT.

Mulholland, M. R. ( 2011). Harmful algal blooms in the Lower James River watershed. Virginia Commonwealth University, Richmond, VA .

Mulholland, M. R. ( 2011). Lecture Meeting of the Coastal and Estuarine Research Federation Daytona Beach, FL .

Mulholland, M. R. ( 2011). Oceanic dinitrogen fixation and new production. Lecture Santa Barbara, CA .

Rebuck, N. D., Hare, J. A., Mulholland, M. R., Bernhardt, P. W. and Staryk, C. J. (December 5, 2011). Variability in a Multi-Decadal Record of Ocean Acidification in Surface Waters of the U.S. Northeast Shelf. Oral Presentation Meeting of the American Geophysical Union San Francisco, CA.

Meyer, K. A., O'Neil, J. M., Mulholland, M. R. and Heil, C. A. (November 13, 2011). Microbial community dynamics surrounding Karenia brevis blooms along the West Florida Shelf. Oral Presentation National Symposium on Harmful Algal Blooms Austin, TX.

Schweitzer, S., Filippino, K. C. and Mulholland, M. R. (September 26, 2011). Light delivery strategies for rapid nutrient removal in a waste stream. Oral Presentation VA AWWA/VWEA Joint Meeting (WaterJAM) Virginia Beach, VA.

Filippino, K. C., Schweitzer, C. and Mulholland, M. R. (September 26, 2011). Phycoremediation strategies for rapid nutrient removal in a waste stream. Oral Presentation VA AWWA/VWEA Joint Meeting (WaterJAM) Virginia Beach, VA.

Najjar, R., Pyke, C. R., Adams, M. B., Breitburg, D., Hershner, C., Kemp, M. W., Howarth, R., Mulholland, M. R., Paolisso, M., Secor, D., Sellner, K., Wardrop, D. and Wood, R. (August 1, 2011). Potential climate-change impacts on the Chesapeake Bay. Oral Presentation The National Conference on Ecosystem Restoration Baltimore, MD.

Morse, R. E., Mulholland, M. R., Shen, J., Blanco, J. L. and Hunley, W. (April 7, 2011). Controls on the formation, development, and transport of Cochlodinium polykrikoides blooms in lower Chesapeake Bay and its tributarie. Oral Presentation Meeting of the Atlantic Estuarine Society Solomons, MD.

Morse, R. E., Mulholland, M. R., Shen, J., Blanco, J. L. and Hunley, W. (March 6, 2011). Physical controls on the formation, development, and transport of Cochlodinium blooms in lower Chesapeake Bay and its tributaries. Oral Presentation Virginia Lakes and Watershed Association (VLWA) Virginia Water Conference Richmond, VA.

Widner, B., Bernhardt, P. W. and Mulholland, M. R. (February 13, 2011). Cyanate as a nitrogen source for marine microbes: Cyanate uptake in the coastal North Atlantic Ocean. Oral Presentation Meeting of the American Society of Limnology and Oceanography San Juan, Puerto Rico.

Garcia, N. S., Breene, C. L., Fu, F. X., Bernhardt, P. W., Mulholland, M. R., Webb, E. A. and Hutchins, D. A. (February 13, 2011). Low CO2 requirement for growth, N2 and CO2 fixation rates in Crocosphaera watsonii near saturating irradiance. Oral Presentation Meeting of the American Society of Limnology and Oceanography San Juan, Puerto Rico.

Roberts, Q. N., Killberg-Thoreson, L. M., Sanderson, M. P., Mulholland, M. R., Bernhardt, P. W., Heil, C., Garrett, M., O'Neil, J. and Bronk, D. A. (February 13, 2011). Nitrogen uptake in the Eastern Gulf of Mexico during Karenia brevis blooms. Oral Presentation Meeting of the American Society of Limnology and Oceanography San Juan, Puerto Rico.

Mulholland, M. R., Bernhardt, P. W., Blanco, J., Zehr, J. P., Moisander, P. H., Turk, K., Hyde, K. and Mannino, A. (February 13, 2011). Primary productivity and dinitrogen fixation on the North Atlantic continental shelf. Oral Presentation Meeting of the American Society of Limnology and Oceanography San Juan, Puerto Rico.

Schweitzer, C. and Mulholland, M. R. (February 2, 2011). Estuarine Microbial Community Response to Dissimilar Nitrogen Sources. Poster the Virginia Sea Grant Project Participant’s Symposium Richmond, VA.

Mesfioui, R., Hatcher, P. G., Mulholland, M. R., Bronk, D. A., Canuel, E. A. and Love, N. G. ( 2010). Reactivity of Effluent Organic Nitrogen in Natural Waters. Oral Presentation Meeting of the American Chemical Society .

Mesfioui, R., Hatcher, P. G., Mulholland, M. R., Bronk, D. A., Canuel, E. A. and Love, N. G. (June 27, 2010). Reactivity and chemical characterization of effluent organic nitrogen in freshwaters determined from Fourier transform ion cyclotron mass spectrometry. Poster International Humic Substances Society Tenerife, Spain.

Bronk, D. A., Roberts, Q., Sanderson, M., Funkey, C., Mulholland, M. R. and Burbage, C. (February , 2010). Bioavailability of Effluent Organic Nitrogen to Virginia Coastal Waters. Poster Virginia Sea Grant Project Participant’s Symposium Richmond, VA.

Al-Rshaidat, M., Mulholland, M. R., Jayakumar, A. and Ward, B. B. (February 21, 2010). Abundance and Distribution of nifH phylotypes within the Arabian Sea-Oxygen Minimum Zone. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

Funkey, C. P., Sanderson, M. P., Roberts, Q. N., Mulholland, M. R., Love, N. G., Mesfioui, R., Brubage, C., Hatcher, P. G., Schweitzer, C. and Bronk, D. A. (February 21, 2010). Contribution of effluent organic nitrogen to coastal eutrophication via direct uptake, photochemical breakdown and salinity-mediated release. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

Bronk, D. A., Sanderson, M. P., Roberts, Q. N., Killberg-Thoreson, L., Mulholland, M. R., Bernhardt, P. W., O'Neil, J. M. and Heil, C. (February 21, 2010). Cross system comparison of the relative contribution of DIN and DON to plankton nitrogen nutrition. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

Sipler, R. E., Sanderson, M. P., Funkey, C. P., Roberts, Q. N., Mulholland, M. R., Love, N. G., Mesfioui, R., Burbage, C., Hatcher, P. G., Schweitzer, C., Fillipino, K. C. and Bronk, D. A. (February 21, 2010). Effect of photolysis on the composition of organic nitrogen in wastewater effluent. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

Procise, L. and Mulholland, M. R. (February 21, 2010). Grazing on Synechococcus by cultured and natural populations of Karenia brevis from the Gulf of Mexico. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

Garcia, N. S., Fu, F., Breene, C. L., Bernhardt, P. W., Mulholland, M. R., Sohm, J. A. and Hutchins, D. A. (February 21, 2010). Interactive Effects of Irradiance and CO2 Concentration on Oceanic N2- and CO2 -Fixation in the Diazotrophic Cyanobacterium Trichodesmium erythraeum. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

Liu, Z., Hatcher, P. G., Lee, C. and Mulholland, M. R. (February 21, 2010). Investigation on physical, chemical and biological pathways of short peptides in seawater. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

O'Neil, J. M., Meyer, K., Bronk, D. A., Heil, C. A. and Mulholland, M. R. (February 21, 2010). Microzooplankton grazing inside and outside blooms of the toxic dinoflagellate Karenia spp. using the dilution method. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

Bernhardt, P. W., Mulholland, M. R., Lee, C., Filippino, K. C. and Tang, T. (February 21, 2010). Peptide hydrolysis and dipeptide uptake in coastal and oceanic waters in the mid-Atlantic. Oral Presentation Meeting of the American Geophysical Union and the American Society of Limnology and Oceanography Portland, OR.

Mesfioui, R., Hatcher, P. G., Mulholland, M. R., Bronk, D. A., Canuel, E. A. and Love, N. G. ( 2009). Bioavailability of effluent organic nitrogen. Oral Presentation American Chemical Society meeting San Francisco, CA.

Heil, C. A., O'Neil, J. M., Mulholland, M. R., Bronk, D. A. and Hitchcock, G. (November 15, 2009). Shifts in nutrient sources and processing in coastal Karenia brevis blooms. Oral Presentation US Harmful Algal Bloom Symposium Ocean Shores, WA.

Mulholland, M. R., Bernhardt, P. W., Filippino, K. C., Blanco-Garcia, J. L., Mondragon, E., Moisander, P. H. and Zehr, J. P. (November 1, 2009). Unexpectedly high rates of N2 fixation and nifH gene diversity in the coastal mid-Atlantic Ocean. Oral Presentation at meeting of the Coastal and Estuarine Research Federation Portland, OR.

Bronk, D. A., Roberts, Q., Love, N. G., Canuel, E., Hatcher, P. G., Mesfioui, R., Filippino, K. C. and Mulholland, M. R. (November 1, 2009). Effluent organic nitrogen (EON): bioavailability and photochemical and salinity release. Oral Presentation meeting of the Coastal and Estuarine Research Federation Portland, OR.

Morse, R. E. and Mulholland, M. R. (November 1, 2009). Environmental controls on the formation and transport of Cochlodinium polykrikoides blooms in lower Chesapeake Bay and its tributaries. Oral Presentation meeting of the Coastal and Estuarine Research Federation Portland, OR.

Boneillo, G. E. and Mulholland, M. R. (November 1, 2009). Interannual, seasonal, and diel differences in nutrient dynamics during brown tide blooms (Aureococcus anophagefferens). Oral Presentation meeting of the Coastal and Estuarine Research Federation Portland, OR.

Najjar, R., Pyke, C. R., Adams, M. B., Breitburg, D., Hershner, C., Kemp, M. W., Howarth, R., Mulholland, M. R., Paolisso, M., Secor, D., Sellner, K., Wardrop, D. and Wood, R. (November 1, 2009). Potential climate-change impacts on the Chesapeake Bay. Oral Presentation meeting of the Coastal and Estuarine Research Federation Portland, OR.

Filippino, K. C., Mulholland, M. R., Bernhardt, P. W., Boneillo, G. E., Morse, R. E., Semcheski, M., Marshall, H., Love, N., Roberts, Q. and Bronk, D. A. (November 1, 2009). The bioavailability of effluent-derived organic nitrogen along an estuarine salinity gradient. Oral Presentation meeting of the Coastal and Estuarine Research Federation Portland, OR.

Ozmon, I., Bernhardt, P. W. and Mulholland, M. R. (November 1, 2009). The effects of carbon dioxide and nutrient enhancement on planktonic estuarine communities. Oral Presentation meeting of the Coastal and Estuarine Research Federation Portland, OR.

Morse, R. E., Mulholland, M. R., Love, N. G. and Blanco, J. L. (October 14, 2009). Controls on the formation and transport of Cochlodinium polykrikoides blooms in lower Chesapeake Bay. Oral Presentation the Virginia Water Resources Symposium Richmond, VA.

Filippino, K. C., Mulholland, M. R., Love, N. G., Bronk, D. A., Mesfioui, R. and Hatcher, P. G. (October 14, 2009). Wastewater treatment derived effluent organic nitrogen: bioavailability in the environment. Oral Presentation the Virginia Water Resources Symposium Richmond, VA.

Love, N. G., Roberts, Q., Bronk, D., Filippino, K. C., Mulholland, M. R., Mesfioui, R., Hatcher, P. G. and Canuel, E. (July 26, 2009). The Importance of Effluent Organic Nitrogen Bioavailability and its Contribution to Nitrogen Management in Nitrogen-Limited Regions. Oral Presentation a meeting of the Association of Environmental Engineering and Science Professors Iowa City, IA.

Bronk, D. A., Mulholland, M. R., Canuel, L. and Love, N. G. (June 28, 2009). Assessing the Bioavailability of Effluent Organic Nitrogen Using a Water quality-Based Bioassay. Oral Presentation Nutrient Removal Conference sponsored by the Water Environment Federation Washington, D.C.

Boneillo, G. A. and Mulholland, M. R. (March 22, 2009). Interannual, seasonal, and diel differences in nutrient dynamics during brown tide blooms (Aureococcus anophagefferens). Oral Presentation Chesapeake Research Consortium’s conference on Ecosystem Based Management: the Chesapeake and Other Systems Baltimore, MD.

Mulholland, M. R., Bernhardt, P. W. and Watson, A. M. (March 22, 2009). Nutritional flexibility of mixotrophic dinoflagellates in lower Chesapeake Bay tributaries. Oral Presentation Chesapeake Research Consortium’s conference on Ecosystem Based Management: the Chesapeake and Other Systems Baltimore, MD.

Morse, R. E., Blanco, J., Hunley, W. and Mulholland, M. R. (March 22, 2009). Physical controls on the formation, development, and transport of Cochlodinium blooms in lower Chesapeake Bay and its tributaries. Oral Presentation Chesapeake Research Consortium’s conference on Ecosystem Based Management: the Chesapeake and Other Systems Baltimore, MD.

Filippino, K. C., Mulholland, M. R., Bronk, D. A. and Love, N. G. (March 22, 2009). The bioavailability of effluent-derived organic nitrogen along an estuarine salinity gradient. Oral Presentation Chesapeake Research Consortium’s conference on Ecosystem Based Management: the Chesapeake and Other Systems Baltimore, MD.

Boneillo, G. E., Bernhardt, P. W. and Mulholland, M. R. (March 5, 2009). Interannual differences in nutrient dynamics during a brown tide bloom (Aureococcus anophagefferens). Oral Presentation Atlantic Estuarine Society Ocean City, MD.

King, A. L., Fu, F. X., Mulholland, M. R., Sanudo-Wilhelmy, S. A., Lohan, M. and Hutchins, D. A. (January 25, 2009). Culture and field-based experimental approaches to assess impacts of increased carbon dioxide on phytoplankton trace metal requirements. Oral Presentation Aquatic Sciences Meeting Nice, France.

Procise, L. A. and Mulholland, M. R. (January 25, 2009). Grazing by recently isolated and natural populations of Karenia brevis from the Gulf of Mexico on Synechococcus. Oral Presentation Aquatic Sciences Meeting Nice, France.

Berman-Frank, I., Yogev, T., Dikla, A., Edo, B. Z., Kress, N., Herut, B., Mulholland, M. R. and Oded, B. (January 25, 2009). Nitrogen fixation in the Eastern Mediterranean Sea. Oral Presentation Aquatic Sciences Meeting Nice, France.

Roberts, Q. N., Bronk, D. A., Sanderson, M. P., Funkey, C., Mulholland, M. R. and Love, N. G. (January 25, 2009). Variation in the bioavailability of effluent organic nitrogen in an estuarine system. Oral Presentation Aquatic Sciences Meeting Nice, France.

Filippino, K. C., Mulholland, M. R., Bernhardt, P. W., Mondragon, E. and Zehr, J. P. (March 2, 2008). Contrasting N2 fixation in the Chesapeake Bay outflow plume with surrounding coastal and shelf waters. Oral Presentation 14th Ocean Sciences Meeting Orlando, FL.

Egerton, T. A., Morse, R. E., Marshall, H. G. and Mulholland, M. R. (March 2, 2008). Daily variability in environmental conditions and phytoplankton composition during two bloom events in the Lafayette River, Virginia. Oral Presentation 14th Ocean Sciences Meeting Orlando, FL.

Morse, R. E., Mulholland, M. R., Egerton, T. A. and Marshall, H. G. (March 2, 2008). Dinoflagellate bloom dynamics and patterns of nutrient uptake in a shallow eutrophic estuary. Oral Presentation 14th Ocean Sciences Meeting Orlando, FL.

Mulholland, M. R., Bernhardt, P. W., Hutchins, D. A., Fu, F. X., Feng, Y., Warner, M. E., Zhang, Y. and Portune, K. (March 2, 2008). Does CO2 play a role in controlling N2 fixation across systems? Oral Presentation 14th Ocean Sciences Meeting Orlando, FL.

Bernhardt, P. W., Mulholland, M. R., Gobler, C., Morse, R., Boneillo, G., Filippino, K. C. and Procise, L. (March 2, 2008). Ecosystem impacts of a Cochlodinium polykrikoides bloom in a mid-Atlantic estuary. Lecture 14th Ocean Sciences Meeting Orlando, FL.

Heil, C. A., Bronk, D., Mulholland, M. R., O'Neil, J. M., Bernhardt, P. W., Murasko, S. and Havens, J. (March 2, 2008). Effects of daylight surface aggregation behavior on nutrient dynamics of a Karenia brevis bloom. Oral Presentation 14th Ocean Sciences Meeting Orlando, FL.

Procise, L. A. and Mulholland, M. R. (March 2, 2008). Grazing by the red tide dinoflagellate, Karenia brevis: Implications for bloom dynamics. Oral Presentation 14th Ocean Sciences Meeting Orlando, FL.

Boneillo, G. E., Lomas, M. W., Bernhardt, P. W. and Mulholland, M. R. (March 2, 2008). Interannual differences in nutrient dynamics during blooms of Aureococcus anophagefferens, a flow cytometry approach. Oral Presentation 14th Ocean Sciences Meeting Orlando, FL.

Bronk, D. A., Henderson, S., Roberts, Q., Killberg, L., Mulholland, M. R. and Love, N. G. (November 28, 2007). Photochemical release of labile nitrogen from natural and effluent organic nitrogen. Oral Presentation Virginia/West Virginia Water Research Blacksburg, VA.

Mulholland, M. R., Schafran, G., Gordon, A., Stubbins, A. and Hatcher, P. G. (November 28, 2007). Coupling nitrogen remediation in wastewater with production of biomass for biofuels. Oral Presentation Virginia/West Virginia Water Research Symposium Blacksburg, VA.

Mulholland, M. R., Filippino, K. C., Bernhardt, P. W., Boneillo, G., Morse, R. E., Procise, L., Bronk, D. A., Love, N. and Canuel, E. (November 28, 2007). Stimulation of algal growth by effluent organic nitrogen along a salinity gradient. Oral Presentation Virginia/West Virginia Water Research Symposium Blacksburg, VA.

Bronk, D. A., Mulholland, M. R., Love, N. and Canuel, E. (November 4, 2007). Bioavailability of effluent organic nitrogen. Oral Presentation ERF 2007 Meeting of the Estuarine Research Federation Providence, RI.

Mulholland, M. R., Bernhardt, P. W., Hutchins, D. A., Fu, F. X., Feng, Y., Warner, M. E., Zhang, Y. and Portune, K. (July 22, 2007). Does CO2 play a role in controlling oceanic N2 fixation? Oral Presentation Ocean Carbon Biogeochemistry meeting Woods Hole, MA.

Cutter, G. A., Cutter, L. S., Bernhardt, P. W. and Mulholland, M. R. (February 4, 2007). Hydrogen sulfide production by Trichodesmium and speculations on its relationship to iron cycling. Oral Presentation ASLO Aquatic Sciences Santa Fe, NM.

Hutchins, D. A., Fu, F. X., Zhang, Y., Warner, M. E., Feng, Y., Portune, K., Bernhardt, P. W. and Mulholland, M. R. (February 4, 2007). CO2 concentration controls Trichodesmium nitrogen and carbon fixation rates, growth rates, and elemental ratios. Oral Presentation ASLO Aquatic Sciences Meeting Santa Fe, NM.

Bernhardt, P. W., Mulholland, M. R., Cutter, G. A. and Cutter, L. S. (February 4, 2007). Hydrogen sulfide production by a cultured diatom and cyanobacteria. Oral Presentation ASLO Aquatic Sciences Meeting Santa Fe, NM.

Procise, L. A. and Mulholland, M. R. (February 4, 2007). Isotopic particle composition, biological and physical properties along the mainstem of the Chesapeake Bay. Oral Presentation ASLO Aquatic Sciences Meeting Santa Fe, NM.

Mulholland, M. R., Filippino, K. C., Bernhardt, P. W., Mondragon, L. and Zehr, J. P. (February 4, 2007). N2 fixation in mid-Atlantic coastal waters. Oral Presentation ASLO Aquatic Sciences Meeting Santa Fe, NM.

Filippino, K. C., Mulholland, M. R. and Bernhardt, P. W. (February 4, 2007). Nitrogen and carbon dynamics in the Chesapeake Bay outflow plume. Oral Presentation ASLO Aquatic Sciences Meeting Santa Fe, NM.

Morse, R. E., Egerton, T. E., Marshall, H. G. and Mulholland, M. R. (February 4, 2007). Timescales of variability in phytoplankton community structure and nutrient uptake dynamics. Oral Presentation ASLO Aquatic Sciences Meeting Santa Fe, NM.

Boneillo, G. E., Lomas, M. W., Bernhardt, P. W. and Mulholland, M. R. (February 4, 2007). Use of flow cytometry to determine nitrogen uptake rates of Aureococcus anophagefferens. Oral Presentation ASLO Aquatic Sciences Meeting Santa Fe, NM.

Stubbins, A., Gordon, A., Hatcher, P. G., Liu, Z., Mulholland, M. R. and Schafran, G. (February 4, 2007). Coupling Algal BioDiesel Production with Wastewater Nutrient Remediation. Oral Presentation Virginia Industry Energy Symposium Richmond, VA.

Cutter, G. A., Cutter, L. S., Bernhardt, P. W. and Mulholland, M. R. (February 20, 2006). Hydrogen Sulfide Production by Marine Phytoplankton: Field and Laboratory Results. Oral Presentation 13th Ocean Sciences Meeting Honolulu, HI.

Rocha, A. M., Mulholland, M. R., Watson, A. M. and Bernhardt, P. W. (February 20, 2006). Interactions among phytoplankton and bacteria in the uptake of organic compounds. Oral Presentation 13th Ocean Sciences Meeting Honolulu, HI.

Makinen, C. P., Moisan, T. A., Blanco, J. L., Ambler, J. W., Atkinson, L., Bernhardt, P. W., Filippino, K. C., Hooker, S. B., Mannino, A., Mulholland, M. R., Nolan, J., Russ, M. E., Swift, R. N., Sybrandy, A. L. and Yungle, J. (February 20, 2006). NASA WAllops Coastal Ocean Observing Laboratory [WA-COOL], the Integrated Ocean Observing System (IOOS) of the Southern Mid-Atlantic Bight. Oral Presentation 13th Ocean Sciences Meeting Honolulu, HI.

Jackson, J., Mulholland, M. R., Filippino, K. C. and Bernhardt, P. W. (February 20, 2006). The use of stable isotopic tracers in the study of nutrient uptake and cycling across the Chesapeake Bay plume. Oral Presentation 13th Ocean Sciences Meeting Honolulu, HI.

Mulholland, M. R. and Lee, C. (February 20, 2006). Uptake of peptide hydrolysis products and their significance in the environment. Oral Presentation 13th Ocean Sciences Meeting Honolulu, HI.

Watson, A. M., Mulholland, M. R., Bernhardt, P. W., Rocha, A., Salerno, M. and Stoecker, D. (October 21, 2005). Inorganic and organic N and C uptake in natural and cultured populations of Prorocentrum minimum. Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Watson, A. M., Mulholland, M. R., Bernhardt, P. W. and Rocha, A. (October 16, 2005). A comparison of inorganic and organic N and C uptake over seasonal time scales in two lower Chesapeake Bay tributaries. Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Filippino, K. C., Mulholland, M. R., Bernhardt, P. W., Austin, J. and Valle-Levinson, A. (October 16, 2005). Evaluation of Nutrient Distributions at the Chesapeake Bay mouth: Physical and Biological Implications. Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Rocha, A., Mulholland, M. R., Watson, A. M. and Bernhardt, P. W. (October 16, 2005). Incorporation of leucine and thymidine by phytoplankton versus bacteria using modified extraction techniques. Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Boneillo, G., Mulholland, M. R. and Bernhardt, P. W. (October 16, 2005). Interannual differences in nutrient dynamics during a brown tide bloom (Aureococcus anophagefferens). Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Mulholland, M. R., Watson, A. M., Rocha, A. and Bernhardt, P. W. (October 16, 2005). Nutritional flexibility of algal mixotrophs in the Chesapeake and coastal bays. Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Morse, R. E., Mulholland, M. R. and Bernhardt, P. W. (October 16, 2005). Peptide hydrolysis and uptake of Trichodesmium-derived dissolved organic nitrogen by Karenia brevis: a direct trophic link. Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Bernhardt, P. W., Mulholland, M. R. and Watson, A. M. (October 16, 2005). Rates of peptide hydrolysis in a lower Chesapeake Bay tributary during seasonal blooms and cultures of bloom-forming dinoflagellates. Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Mulholland, M. R., Watson, A. M., Bernhardt, P. W. and Lee, C. (October 16, 2005). Uptake of peptide hydrolysis products in marine and estuarine systems. Oral Presentation Estuarine Research Federation Biannual Meeting Norfolk, VA.

Mulholland, M. R., Watson, A. M., Rocha, A. and Bernhardt, P. W. (June 19, 2005). Interannual differences in the relative uptake rates of dissolved organic carbon and nitrogen by mixotrophic dinoflagellate species in the Lafayette River, Virginia, 2002-2003. Oral Presentation XIth International Conference on Harmful Algae Capetown, South Africa.

O'Neil, J. M., Albert, S., Osborne, N., Shaw, G., Heil, C. A., Mulholland, M. R. and Bronk, D. A. (November 15, 2004). Nitrogen acquisition by the toxic marine cyanobacterium Lyngbya majuscula from Moreton Bay, Australia and Tampa Bay, Florida. Oral Presentation XIth International Conference on Harmful Algae Capetown, South Africa.

Heil, C. A., Murasko, S., O'Neil, J. M., Mulholland, M. R. and Bronk, D. A. (November 15, 2004). Phosphorus Uptake and Regeneration Within Two Karenia brevis Blooms on the West Florida Shelf. Oral Presentation XIth International Conference on Harmful Algae Capetown, South Africa.

Mulholland, M. R., Boneillo, G., Bernhardt, P. W. and Minor, E. C. (October 4, 2004). Factors promoting brown tide blooms in Virginia’s coastal bays. Oral Presentation Virginia Water Research Symposium Blacksburg, VA.

Mulholland, M. R., Watson, A. M., Rocha, A. and Bernhardt, P. W. (October 4, 2004). Nutritional factors promoting harmful algal blooms in lower Chesapeake Bay tributaries: the advantages of mixotrophy. Oral Presentation Virginia Water Research Symposium Blacksburg, VA.

Simjouw, J. P., Mulholland, M. R. and Minor, E. C. (June 13, 2004). Comparison of dissolved organic matter concentration and characteristics during Aureococcus anophagefferens blooms in 2002 and 2003: a search for possible causes. Oral Presentation American Society of Limnology and Oceanography’s Summer Meeting Savannah, GA.

Rocha, A., Mulholland, M. R., Watson, A. M. and Bernhardt, P. W. (June 13, 2004). Incorporation of thymidine and leucine by marine phytoplankton: implications for bacterial productivity rate estimates. Oral Presentation American Society of Limnology and Oceanography’s Summer Meeting Savannah, GA.

Mulholland, M. R., Boneillo, G., Bernhardt, P. W. and Minor, E. C. (June 13, 2004). Interannual and inter-site differences in brown tide (Aureococcus anophagefferens) bloom physiology. Oral Presentation American Society of Limnology and Oceanography’s Summer Meeting Savannah, GA.

Watson, A. M., Mulholland, M. R., Bernhardt, P. W. and Rocha, A. (March 25, 2004). Photosynethesis and uptake of dissolved organic carbon by the mixotrophic dinoflagellates, Prorocentrum minimum and Akashiwo sanguinea, during blooms in the Lafayette River, Virginia. Oral Presentation Atlantic Estuarine Research Society Spring Meeting Salisbury, MD.

Lin, S., Mulholland, M. R., Zhang, H. and Carpenter, E. J. (February 15, 2004). A comparative study for Pfiesteria piscicida and its related dinoflagellate Cryptoperinidiopsis sp. Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Honolulu, HI.

Mulholland, M. R., Bernhardt, P. W., Bronk, D. A., O'Neil, J. M. and Heil, C. A. (February 15, 2004). Does nitrogen regeneration from the N2 fixing cyanobacteria Trichodesmium spp. fuel Karenia brevis blooms in the Gulf of Mexico? Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Honolulu, HI.

O'Neil, J. M., Heil, C. A., Mulholland, M. R. and Bronk, D. A. (February 15, 2004). Effect of copepod grazers on alkaline phosphatase activity in Trichodesmium spp. from the Gulf of Mexico. Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Honolulu, HI.

Bernhardt, P. W., Mulholland, M. R., O'Neil, J. M., Bronk, D. A. and Heil, C. A. (February 15, 2004). N2 fixation and N regeneration in Trichodesmium IMS101 grown in chemostats at various growth rates. Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Honolulu, HI.

Bronk, D. A., Sanderson, M. P., Mulholland, M. R., Heil, C. A. and O'Neil, J. M. (February 15, 2004). Organic and inorganic carbon and nitrogen uptake kinetics in field and culture populations of Karenia brevis. Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Honolulu, HI.

Heil, C. A., O'Neil, J. M., Mulholland, M. R. and Bronk, D. A. (February 15, 2004). Phosphorus uptake and regeneration on the West Florida shelf. Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Honolulu, HI.

Mulholland, M. R., Heil, C. A., Bronk, D. A., O'Neil, J. M. and Bernhardt, P. W. (December 9, 2003). Does nitrogen regeneration from the N2 fixing cyanobacteria Trichodesmium spp. fuel Karenia brevis blooms in the Gulf of Mexico? Oral Presentation Second Symposium on Harmful Algal Blooms Woods Hole, MA.

Watson, A. M., Mulholland, M. R., Bernhardt, P. W., Rocha, A., Reynolds, S. and Boneillo, G. (December 9, 2003). The relative importance of DOM uptake, grazing and photosynthesis over diel cycles in the mixotrophic dinoflagellate, Akashiwo sanguinea, in the Lafayette River, a tributary of the Chesapeake Bay. Oral Presentation Second Symposium on Harmful Algal Blooms Woods Hole, MA.

Lin, S., Mulholland, M. R., Zhang, H., Feinstein, T. N., Jochem, F. J. and Carpenter, E. J. (December 9, 2003). Intense grazing and non-cyclic prey-predator dynamics in Pfiesteria piscicida (Dinophyceae) cultures. Oral Presentation Second Symposium on Harmful Algal Blooms in the US Woods Hole, MA.

Boneillo, G. M., Mulholland, M. R., Bernhardt, P. W. and Minor, E. C. (December 9, 2003). Competition for organic resources: bacteria versus Aureococcus anophagefferens. Oral Presentation Second Symposium on Harmful Marine Algae in the U.S. Woods Hole, MA.

Mulholland, M. R., Boneillo, G., Bernhardt, P. W., Minor, E., Simjouw, J. P. and Lee, C. (September 14, 2003). Competition for organic resources: bacteria versus Aureococcus anophagefferens. Oral Presentation Estuarine Research Federation Annual Meeting Seattle, WA.

Rocha, A., Mulholland, M. R., Bernhardt, P. W., Watson, A. M., Boneillo, G. and Reynolds, S. (September 14, 2003). Uptake of thymidine and leucine phytoplankton: implications for bacterial productivity estimates. Oral Presentation Estuarine Research Federation Annual Meeting Seattle, WA.

Heil, C. A., Mulholland, M. R., Bernhardt, P. W., Bronk, D. A., O'Neil, J. M., Vargo, G. A., Walsh, J. J. and Fanning, K. A. (February 10, 2003). Spatial and temporal patterns of DON concentration on the central West Florida Shelf: contributions from offshore nitrogen fixation and estuarine outflows. Oral Presentation American Society of Limnology and Oceanography Meeting Salt Lake City, UT.

O'Neil, J. M., Lenes, J., Heil, C. A., Bernhardt, P. W., Mulholland, M. R. and Bronk, D. A. (February 10, 2003). Dissolved iron uptake by the cyanobacterium Trichodesmium in surface waters of the Gulf of Mexico. Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Salt Lake City, UT.

Simjouw, J. P., Minor, E. C. and Mulholland, M. R. (February 10, 2003). Molecular-level characteristics of dissolved organic matter in Chincoteague Bay prior to and during an Aureococcus anophagefferens bloom. Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Salt Lake City, UT.

Mulholland, M. R. and Lee, C. (February 10, 2003). Peptide hydrolysis and dipeptide uptake in marine environments. Oral Presentation American Society of Limnology and Oceanography’s Ocean Sciences Meeting Salt Lake City, UT.

Henry, A., Mulholland, M. R., Bernhardt, P. W., Watson, A. M. and Boneillo, G. (December 6, 2002). Nutrient Uptake Kinetics in Two Virginia Estuaries. Exhibit AGU Fall Meeting San Francisco, CA.

Mulholland, M. R., Boneillo, G., Bernhardt, P. W., Cornfeld, E., Watson, A. M. and Minor, E. (October 21, 2002). A comparison of photosynthetic and heterotrophic carbon acquisition by Aureococcus anophagefferens. Oral Presentation Xth International Conference on Harmful Algae St. Petersburg, FL.

Heil, C. A., Mulholland, M. R., Bronk, D. A., Bernhardt, P. W. and O'Neil, J. M. (October 21, 2002). Bacterial and size-fractionated primary production within the 2001 Karenia brevis bloom on the West Florida Shelf. Oral Presentation Xth International Conference on Harmful Algae St. Petersburg, FL.

Mulholland, M. R., Heil, C. A., Bronk, D. A., O'Neil, J. M. and Bernhardt, P. W. (October 21, 2002). Does nitrogen regeneration from the N2 fixing cyanobacteria, Trichodesmium spp., fuel Karenia brevis blooms in the Gulf of Mexico? Oral Presentation Xth International Conference on Harmful Algae St. Petersburg, FL.

Bronk, D. A., Sanderson, M. P., Mulholland, M. R., Heil, C. A. and O'Neil, J. M. (October 21, 2002). Organic and inorganic nitrogen uptake kinetics in field populations dominated by Karenia brevis. Oral Presentation Xth International Conference on Harmful Algae St. Petersburg, FL.

Watson, A. M., Mulholland, M. R., Bernhardt, P. W., Rocha, A., Cornfeld, E. and Boneillo, G. (October 21, 2002). Uptake and degradation of organic compounds by bloom-forming dinoflagellates in the lower Chesapeake Bay and its tributaries. Oral Presentation Xth International Conference on Harmful Algae St. Petersburg, FL.

Bronk, D. A., Mulholland, M. R., Sanderson, M., Bernhardt, P. W., Heil, C. A. and O'Neil, J. (February 11, 2002). Fate of recently fixed nitrogen by Trichodesmium in the eastern Gulf of Mexico: results from dialysis experiments. Oral Presentation American Society of Limnology and Oceanography and American Geophysical Union’s Ocean Sciences Meeting Honolulu, HI.

Capone, D. G., Burns, J., Carpenter, E. J., Furnas, M., Sprague, L., Montoya, J. and Mulholland, M. R. (February 11, 2002). High rates of N2 fixation in coastal waters of northern Australia. Oral Presentation American Society of Limnology and Oceanography and American Geophysical Union’s Ocean Sciences Meeting Honolulu, HI.

Mulholland, M. R., Bronk, D. A., Heil, C. A., O'Neil, J., Bernhardt, P. W. and Sanderson, M. (February 11, 2002). N2 fixation and N regeneration by Trichodesmium in the Gulf of Mexico and in cultures. Oral Presentation American Society of Limnology and Oceanography and American Geophysical Union’s Ocean Sciences Meeting Honolulu, HI.

Sanderson, M. D., Bronk, D. A., Mulholland, M. R., Bernhardt, P. W. and Heil, C. A. (February 11, 2002). Nitrogen nutrition of Trichodesmium in the eastern Gulf of Mexico. Oral Presentation American Society of Limnology and Oceanography and American Geophysical Union’s Ocean Sciences Meeting Honolulu, HI.

Mulholland, M. R., Gobler, C. and Lee, C. (February 12, 2001). Amino acid oxidation and peptide hydrolysis in populations seasonally dominated by Aureococcus anophagefferens: pathways of DOM mobilization. Oral Presentation American Society of Limnology and Oceanography Albuquerque, NM.

Mulholland, M. R., Gobler, R. C. and Lee, C. (December 4, 2000). Amino acid oxidation and peptide hydrolysis in populations seasonally dominated by Aureococcus anophagefferens: pathways of DOM mobilization. Oral Presentation Symposium on Harmful Marine Algae in the U.S. Woods Hole, MA.

Mulholland, M. R., Lee, R. C. and Glibert, P. M. (January 24, 2000). Amino acid oxidation and peptide hydrolysis in the Pocomoke River, a tributary of the Chesapeake Bay. Oral Presentation Ocean Sciences Meeting of the American Society of Limnology and Oceanography and the American Geophysical Union San Antonio, TX.

• Secretary, Biological Oceanography, Ocean Sciences Section, American Geophysical Union ,