Marine Microbial Diversity

Francis, C. A., G. D. O’Mullan and B. B. Ward. Diversity of ammonia monooxygenase (amoA) genes across environmental gradients in Chesapeake Bay sediments. Geobiology, 1: 129-140 (2003).

Song, B. and B. B. Ward. Nitrite reductase genes in halobenzoate degrading denitrifyng bacteria and related species. FEMS Microbial Ecology, 34: 349-357. (2003)

Ward, B. B. and G. D. O'Mullan. Worldwide distribution of marine ammonia-oxidizing Gamma-Proteobacteria detected in seawater by PCR and sequencing of 16S rRNA and AmoA genes, Applied and Environmental Microbiology, 68: 4153-4157 (2002).

Ward, B. B. How many species of prokaryotes are there? Proceedings of the National Academy of Sciences, US. 99:10234-10236 (2002).

Ward, B. B., D. P. Martino, M. C. Diaz and S. B. Joye. Analysis of ammonia-oxidizing bacteria from hypersaline Mono Lake, California on the basis of 16s rRNA sequences. Applied and Environmental Microbiology, 67: 2873-2881 (2000).

Functional Diversity and Biogeochemistry

O'Mullan, G.D. and B. B. Ward. Comparison of temporal and spatial variability of ammonia-oxidizing bacteria to nitrification rates in Monterey Bay, CA (in press, Applied and Environmental Microbiology).

Casciotti, K. L. and B. B. Ward. Nitric oxide reductase (norB) genes identified in ammonia-oxidizing bacteria. (in press, FEMS Microbial Ecology).

Allen, A. E., B. Song and B. B. Ward. Characterization of diatom (Bacillariophyceae) nitrate reductase genes and detection of eukaryotic nitrate reductase genes from marine waters (in press, Journal of Phycology).

Song, B. and B. B. Ward. Molecular characterization of the assimilatory nitrate reductase gene and its expression in the marine green algae Dunaliella tertiolecta. Journal of Phycology, 40: 721-731 (2004).

Granger, J. and B. B. Ward. Accumulation of nitrogen oxides in copper-limited cultures of denitrifying bacteria. Limnology and Oceanography, 48: 313-318 (2003).

Casciotti, K. A. and B. B. Ward. Nitrite reductase genes in ammonia-oxidizing bacteria. Applied and Environmental Microbiology, 67: 2213-2221 (2001).

Casciotti, K. L., D. M. Sigman and B. B. Ward. Linking diversity and biogeochemistry in ammonia-oxidizing bacteria. Geomicrobiology, 20: 335-353. (2003)

Jayakumar, D.A., C. A. Francis, S. W. A. Naqvi, and B. B. Ward. Diversity of nitrite reductase genes (nirS) in the denitrifying water column of the coastal Arabian Sea . Aquatic Microbial Ecology, 34:69-78 (2004).

Ward, B. B., K. J. Courtney and J. H. Langenheim. Inhibition of Nitrosomonas europaea by monoterpenes from coastal redwood (Sequois sempervirens) in whole cell studies. Journal of Chemical Ecology, 23: 2583-2598. (1997).

Microarrays to study Functional Diversity

Jenkins, B. D., G. F. Steward, S. M. Short, B. B. Ward and J. P. Zehr. Fingerprinting diazotroph communities in the Chesapeake Bay by using a DNA macroarray. Applied and Environmental Microbiology, 70: 1767-1776 (2004).

Steward, G.F., B. D. Jenkins, B. B. Ward and J. P. Zehr. Development and testing of a DNA macroarray to assess nitrogenase (nifH) gene diversity. Applied and Environmental Microbiology, 70: 1455-1465 (2004).

Taroncher-Oldenburg, G, E. Griner, C. A. Francis and B. B. Ward. Oligonucleotide microarray for the study of functional gene diversity of the nitrogen cycle in the environment. Applied and Environmental Microbiology, 69: 1159-1171 (2003).

Antarctic Microbiology

Ward, B. B., J. Granger, M. T. Maldonado, K. L. Casciotti, S. Harris and M. L. Wells. Denitrification in the hypolimnion of permanently ice-covered Lake Bonney, Antarctica (in press, Aquatic Microbial Ecology).

Ward, B. B., J. Granger, M. T. Maldonado and M. L. Wells. What limits bacterial production in the suboxic region of permanently ice-covered Lake Bonney, Antarctica? Aquatic Microbial Ecology, 31: 33-47 (2003).

Ward, B.B. and J.C. Priscu. Detection and characterization of denitrifying bacteria in an ice-covered Antarctic Lake. Hydrobiologia, 347: 57-68. (1997)

Voytek, M. A., B. B. Ward and J. C. Priscu. The abundance of ammonia-oxidizing bacteria in Lake Bonney, Antarctica determined by immunofluorescence, PCR and in situ hybridization. Antarctic Research Series, The McMurdo Dry Valleys, pp. 217-228. (1998)

Nitrification, Denitrification, Dissolved Organic Nitrogen

Ward, B. B. Temporal variability in nitrification rates and related biogeochemical factors in Monterey Bay (in press, Marine Ecology-Progress Series).

Caffrey, J. M., N. E. Harrington, I. P. Solem and B. B. Ward. Biogeochemical Processes in a Small California Estuary, Elkhorn Slough, CA.: 2. Nitrification Activity, Community Structure and Role in Nitrogen Budgets, Marine Ecology Progress Series, 248: 27-40 (2003)

Caffrey, J. M., N. E. Harrington and B. B. Ward. Biogeochemical Processes in a Small California Estuary: 1. Benthic Fluxes and Pore Water Constituents Reflect High Nutrient Freshwater Inputs, Marine Ecology Progress Series, 233: 39-53 (2002).

Ward, B. B. Nitrification in Aquatic Systems. Encyclopedia of Environmental Microbiology, D. A Capone, Ed., Wiley & Sons, New York, Pp. 2144-2167 (2002).

Zehr, J. P, and B. B. Ward. Nitrogen cycling in the ocean: new perspectives on processes and paradigms. Applied and Environmental Microbiology, 68: 1015-1024 (2002).

Ward, B. B. and D. A. Bronk. Net nitrogen uptake and DON release in surface waters: Size fraction experiments implicate grazing and community structure in DON release. Marine Ecology Progress Series, 219: 11-24. (2001).

Golet, D. S. and B. B. Ward. Vertical distribution of denitrification potential, denitrifying bacteria and benzoate utilization in intertidal microbial mat communities. Microbial Ecology, 42: 22-34 (2001).

Bronk, D. A. and B. B. Ward. Gross and net nitrogen uptake and DON release in the euphotic zone of Monterey Bay, California. Limnology and Oceanography, 44:573-585 (1999).

Diaz, C. M. and B. B. Ward. Sponge mediated nitrification in tropical benthic communities. Marine Ecology Progress Series, 156: 97-107. (1997) .