Deborah Repert


Deb Repert has worked with the USGS since 1998 as a microbiologist focusing on nitrogen cycling processes in aquatic environments. She is interested in the physical, chemical and microbiological processes controlling the transport and fate of nutrients in both pristine and contaminated environments.

She received an undergraduate degree in Biology from Clarkson University and a Master's degree in Zoology with an emphasis in microbiology and stream ecology from Michigan State University.



M.S. - Zoology, emphasis in microbiology and stream ecology, Michigan State University, 1992

B.S. - Biology, Clarkson University, 1988


Microbiologist, National Research Program, US Geological Survey, Boulder, CO, 1998-present

Research Technician, The Louis Calder Center, Fordham University, Armonk, NY, 1993-1997

Stream Research Coordinator, Arctic LTER Project, The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA ,1992-1993

Laboratory Technician, Clarkson University, Potsdam, NY, 1988-1989



Stoliker, D.L., Repert, D.A., Smith, R.L., Song, B., LeBlanc, D.R., McCobb, T.M., Conaway, C.H., Hyun, S.P., Koh, D.-C., Moon, H.S., Kent, D.B., 2016, Hydrologic controls on nitrogen cycling processes and functional gene abundance in sediments of a groundwater flow-through lake: Environmental Science and Technology, in press, doi:10.1021/acs.est.5b06155. 

Repert, D.A., Smith, R.L., Underwood, J.C., and Song, B., 2014, Nitrogen cycling processes and microbial community composition in bed sediments in the Yukon River at Pilot Station: Journal of Geophysical Research: Biogeosciences, v. 119, p. 2328-2344, doi:10.1002/2014JG002707.

Smith, R.L., Repert, D.A., Barber, L.B., and LeBlanc, D.R., 2013, Long-term groundwater contamination after source removal—The role of sorbed carbon and nitrogen on the rate of reoxygenation of a treated-wastewater plume on Cape Cod, MA, USA: Chemical Geology v. 337-338, p. 38-47. 

Byrne, M.J., Sr., Smith, R.L., and Repert, D.A., 2012, Potential for denitrification near reclaimed water application sites in west Orange County, Florida, 2009: U.S. Geological Survey Open-File Report 2012-1123, 54 p. 

Savoie, J.G., LeBlanc, D.R., Fairchild, G.M., Smith, R.L., Kent, D.B., Barber, L.B., Repert, D.A., Hart, C.P., Keefe, S.H., and Parsons, L.A., 2012, Groundwater-quality data for a treated-wastewater plume near the Massachusetts Military Reservation, Ashumet Valley, Cape Cod, Massachusetts, 2006-2008: U.S. Geological Survey Data Series 648, 11 p. 

Underwood, J.C., Harvey, R.W., Mete, D.W., Repert, D.A., Baumgartner, L.K., Smith, R.L., Roane, T.M., and Barber, L.B., 2011, Effects of the antimicrobial sulfamethoxazole on groundwater bacterial enrichment: Environmental Science and Technology, v. 45, p. 3096-3101.

Smith, R.L., Bohlke, J.K., Repert, D.A., and Hart, C.P., 2009, Nitrification and denitrification in a Midwestern stream containing high nitrate: In situ assessment using tracers in dome-shaped incubation chambers: Biogeochemistry, v. 96, p.189-208.

Smith, R. L., Repert, D. A., and Hart, C. P., 2009. Geochemistry of inorganic nitrogen in waters released from coal-bed methane supply wells in the Powder River Basin, Wyoming, Environ. Sci. Technol. 43:2348-2354. 

Repert, D.A., Barber, L.B., Hess, K.B., Keefe, S.H., Kent, D.B., LeBlanc, D.H. and Smith, R.L., 2006. Long-term natural attenuation of carbon and nitrogen within a groundwater plume after removal of the treated wastewater source. Environ. Sci. Technol., 40, p. 1154-1162.

Smith, R.L., Baumgartner, L.K., Miller, D.N., Repert, D.A. and Bohlke, J-K., 2006. Assessment of Nitrification Potential in Ground Water Using Short Term, Single-Well Injection Experiments.  Microbial Ecology, 51, p. 22-35. doi:10.1007/s00248-004-0159-7.

Smith, R.L., Buckwalter, S.P., D.A. Repert and D.N. Miller, 2005. Small-scale, hydrogen-oxidizing-denitrifying bioreactor for treatment of nitrate-contaminated drinking water.  Water Research, v.39, p.2014-2023.

Sinsabaugh, R.L., Carreiro, M.M., Repert, D.A. 2002. Allocation of extracellular enzymatic activity in relation to litter composition, M deposition, amd mass loss. Biogeochemistry 60(1):1-24. 

Carreiro, M., Sinsabaugh, R., Repert, D., Parkhurst, D. 2000. Microbial enzyme shifts explain litter decay responses to simulated nitrogen deposition. Ecology 81(9):2359-2365. 

Smith, R.L., Bohlke, J.K., Revesz, K., Yoshinari, T., Hatzinger, P.B., Penarrieta, C.T., and Repert, D.A., 1999, In situ assessment of the transport and microbial consumption of oxygen in ground water, Cape Cod, Massachusetts, In: Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999-- Volume 3 of 3—Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, pp 317-322.           

Sinsabaugh, R.L., Antibus, R.K., Rayburn. L., Repert, D., and Weiland, T. 1993. Wood decomposition over a first-order watershed: Nitrogen and phosphorus dynamics in relation to extracellular enzyme activities. Ecology 74(5):1586-1593. 

Repert, Deborah A. 1993. Aquatic hyphomycetes and aquatic oomycetes as decomposers of leaves in a northern Michigan stream. Master’s Thesis. 

Sinsabaugh, R.L., Antibus, R.K., Likens, A.E., McClaugherty, C.A., Rayburn, L., Repert, D., and Weiland, T. 1992. Wood decomposition over a first-order watershed: Mass loss as a function of lignocellulase activity. Soil Biology and Biochemistry 24(8):743-749. 

Sinsabaugh, R.L., Repert, D., Weiland, T., Golladay, S.W., and Likens, A.E. 1991. Exoenzyme accumulation in epilithic biofilms. Hydrobiologia. 222:29-37.