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Richard Smith

Hydrologist

Contact Info


Short Biography

Education

BS (Biology) Western Michigan University, 1974

MS (Biology) Western Michigan University, 1976

PhD (Microbial Ecology) Michigan State University, 1981 

 

Employment

Postdoc        NRC Postdoctoral Fellow, US Geological Survey, Menlo Park, CA 1981-1983. 

Hydrologist   National Research Program, US Geological Survey, Arvada, CO, 1983-1988. 

Hydrologist   National Research Program, US Geological Survey, Boulder, CO, 1988-present 



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Publications

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. [Link]

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. [Link]

Barnes, R. T., Smith, R.L., and Aiken, G. R., 2012, Linkages between denitrification and dissolved organic matter quality, Boulder Creek watershed, CO: Journal of Geophysical Research, v. 117, G01014, doi:10.1029/2011JG001749. [Link]

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. Geologicial Survey Data Series 648, 11 p. [Link]

Smith, R.L., Repert, D.A., Barber, L.B., and LeBlanc, D.R., 2012, 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: Chemical Geology, doi.org/10.1016/j.chemgeo.2012.11.007. [Link]

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. [Link]

Mueller, R. S., Denef, V. J., Kalnejais, L. H., Suttle, K. B., Thomas, B. C., Wilmes, P., Smith, R.L., Nordstrom, D. K., Shah, M. B., VerBerkmoes, N. C., Hettich, R. L., and Banfield, J. F., 2010, Ecological distribution and population physiology defined by proteomics in a natural microbial community: Molecular Systems Biology, v. 6, no. 374, doi:10.1038/msb.2010.30. [Link]

Smith, R.L., Böhlke, 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. [Link]

Smith, R.L., Repert, D. A., and Hart, C. P., 2009, Geochemistry of inorganic nitrogen in waters released from coal-bed natural gas production wells in the Powder River Basin, Wyoming: Environmental Science and Technology, v. 43, p. 2348-2354. [Link]

Harris, S. H., and Smith, R.L., 2009, In situ measurements of microbially-catalyzed nitrification and nitrate reduction rates in an ephemeral drainage channel receiving coalbed natural gas discharge, Powder River Basin, Wyoming, USA: Chemical Geology, v. 267, p. 77-84. [Link]

Böhlke, J. K., Antweiler, R., Harvey, J. W., Laursen, A., Smith, L. K., Smith, R.L., and Voytek, M. A., 2009, Multi-scale measurements and modeling of denitrification in streams with varying flow and nitrate concentrations in the upper Mississippi River basin, USA: Biogeochemistry, v. 93, p. 117-141. [Link]

Miller, D. N., and Smith, R.L., 2009, Microbial characterization of nitrification in a shallow, nitrogen-contaminated aquifer, Cape Cod, Massachusetts and detection of a novel cluster associated with nitrifying Betaproteobacteria: Journal of Contaminant Hydrology, v. 103, p. 182-193. [Link]

Smith, R.L., and Yoshinari, T., 2008, Occurrence and turnover of nitric oxide in a nitrogen-impacted sand and gravel aquifer: Environmental Science and Technology, v. 42, p. 8245-8251. [Link]

Harris, S. H., Smith, R.L., and Barker, C. E., 2008, Microbial and chemical factors influencing methane production in laboratory incubations of low-rank subsurface coals: International Journal of Coal Geology, v. 76, p. 46-51. [Link]

Sahl, J. W., Schmidt, R., Swanner, E. D., Mandernack, K. W., Templeton, A. S., Kieft, T. L., Smith, R.L., Sanford, W. E., Callaghan, R. L., Mitton, J. B., and Spear, J. R., 2008, Subsurface microbial diversity in deep-granitic fracture water in Colorado: Applied and Environmental Microbiology, v. 71, p. 143-152. [Link]

Böhlke, J. K., Smith, R.L., Hannon, J. E., 2007, Isotopic analysis of N and O in nitrite and nitrate by sequential selective bacterial reduction to N2O: Analytical Chemistry, v. 79, p. 5888-5895. [Link]

Harris, S. H., Smith, R.L., and Suflita, J. M., 2007, In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity: FEMS Microbiology Ecology, v. 60, p. 220-228. [Link]

Smith, R.L., and Harris, S. H., 2007, Determining the terminal electron-accepting reaction in the saturated subsurface, In: C. J. Hurst, R. L. Crawford, J. L. Garland, D. A. Lipson, A. L. Mills, and L. D. Stetzenbach, eds., Manual of Environmental Microbiology, 3nd Edition, ASM Press, Washington, DC, pp. 860-871.

Savoie, Jennifer G.; Smith, Richard L.; Kent, Douglas B.; Hess, Kathryn M.; LeBlanc, Denis R.; Barber, Larry B., 2006. Ground-Water-Quality Data for a Treated-Wastewater Plume Undergoing Natural Restoration, Ashumet Valley, Cape Cod, Massachusetts, 1994-2004. Data Series 198, CD-ROM [Link]

Repert, D. A., Barber, L. B., Hess, K. H., Keefe, S. H., Kent, D. B., LeBlanc, D. R., and Smith, R.L., 2006, Long-term natural attenuation of carbon and nitrogen within a groundwater plume originating from treated wastewater: Environ. Sci. Tech., v. 40, p. 1154-1162. [Link]

Baeseman, J., Silverstein, J., and Smith, R.L., 2006, Denitrification in streams impacted by acid mine drainage: Effects of pH, various electron donors and iron: Microbial Ecology, v. 51, p. 232-241. [Link]

Böhlke, J. K., Smith, R.L., and Miller, D. N., 2006, Ammonium transport and reaction in contaminated groundwater: Application of isotope tracers and isotope fractionation studies: Water Resources Research, v. 42, W05411, doi:10.1029/2005WR004349. [Link]

Smith, R.L., Baumgartner, L. K., Miller, D. N., Repert, D. A., and Böhlke, J. K., 2006, Assessment of nitrification potential in ground water using short-term single-well injection experiments: Microbial Ecology, v. 51, p. 22-35. [Link]

Antweiler, R. C., Smith, R.L., Voytek, M. A., Böhlke, J. K., and Dupre, D. H., 2005, Water-quality data from two agricultural drainage basins in northwestern Indiana and northeastern Illinois: III. Biweekly data, 2000-2002: U.S. Geological Survey Open-File Report 2005-1197, 66 pp. [Link]

Antweiler, R. C., Smith, R.L., Voytek, M. A., Böhlke, J. K., 2005, Water-quality data from two agricultural drainage basins in northwestern Indiana and northeastern Illinois: II. Diel data, 1999-2001: U.S. Geological Survey Open-File Report 2005-1053, 114 pp. [Link]

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

Holloway, J. M., and Smith, R.L., 2005, Nitrogen and carbon flow from rock to water: Regulation through soil biogeochemical processes, Mokelumne River watershed, California and Grand Valley, Colorado: Journal of Geophysical Research, v. 110, F01010, doi:10.1029/2004JF000124. [Link]

Savoie, Jennifer G.; Kent, Douglas B.;S mith, Richard L.; LeBlanc, Denis R.; Hubble, David W., 2004. Changes in Ground-Water Quality near Two Granular-Iron Permeable Reactive Barriers in a Sand and Gravel Aquifer, Cape Cod, Massachusetts, 1997-2000. Water-Resources Investigations Report 2003-4309, 84 p. [Link]

Antweiler, R. C., Smith, R.L., Voytek, M. A., Böhlke, J. K., and Richards, K. D., 2004, Water-quality data from two agricultural drainage basins in northwestern Indiana and northeastern Illinois: I. Lagrangian data, 1999-2002: U.S. Geological Survey Open-File Report 2004-1317, 206 pp. [Link]

Holloway, J.M., Smith, R.L., and Nordstrom, D.K., 2004, Nitrogen transformations in hot spring runoff, Yellowstone National Park, USA: Proceedings of the 11th International Symposium on Water-Rock Interaction, WRI-11, Saratoga Springs, NY, USA, p. 145-148.

Smith, R.L., Böhlke, J. K., Garabedian, S. P., Revesz, K. M., Yoshinari, T., 2004, Assessing denitrification in ground water using natural gradient tracer tests with 15N: In situ measurement of a sequential multistep reaction: Water Resources Research, v. 40, W07101, doi:10.1029/2003WR002919. [Link]

Savoie, J.G., Kent, D.B., Smith, R.L., LeBlanc, D.R., and Hubble, D.W., 2004, Changes in ground-water quality near two granular-iron permeable reactive barriers in a sand and gravel aquifer, Cape Cod, Massachusetts, 1997-2000: U.S. Geological Survey Water-Resources Investigations Report 03-4309, 77 pp. [Link]

McCobb, T.D., LeBlanc, D.R., Walter, D.A., Hess, K.M., Kent, D.B., and Smith, R.L., 2003, Phosphorus in a ground-water contaminant plume discharging to Ashumet Pond, Cape Cod, Massachusetts, 1999: U.S. Geological Survey Water-Resources Investigations Report 02-4306, 69 pp. [Link]

Hatzinger, P.B., Palmer, P., Smith, R.L., Penarrieta, C., and Yoshinari, T., 2003, Applicability of tetrazolium salts for measurement of respiratory activity and viability of groundwater bacteria: Journal of Microbiological Methods, v. 52, p. 47-58. [Link]

Killingstad, M.W., Widdowson, M.A., and Smith, R.L., 2002, Modeling enhanced in situ denitrification in ground water: Journal of Environmental Engineering, v. 128, p. 491-504. [Link]

Smith, R.L., 2002, Determining the terminal electron-accepting reaction in the saturated subsurface, In: C. J. Hurst, R. L. Crawford, G. R. Knudsen, M. J. McInerney, and L. D. Stetzenbach, eds., Manual of Environmental Microbiology, 2nd Edition, ASM Press, Washington, DC, pp. 743-752.

Smith, R.L., Miller, D.N., Brooks, M.H., Widdowson, M.A., and Killingstad, M.A., 2001, In situ stimulation of groundwater denitrification with formate to remediate nitrate contamination: Environmental Science and Technology, v. 35, p. 196-203. [Link]

Oremland, R.S., Dowdle, P.R., Hoeft, S., Sharp, J.O., Schaefer, J.K., Miller, L.G., Switzer Blum, J., Smith, R.L., Bloom, N.S., and Wallschlaeger, D., 2000, Bacterial dissimiliatory reduction of arsenate and sulfate in meromictic Mono Lake, California: Geochimica et Cosmochimica Acta, v. 64, p. 3073-3084. [Link]

Smith, R.L., Kumler, B.A., Peacock, T.R., and Miller, D.N., 1999, Evolution of a ground water sewage plume after removal of the 60-year-long source, Cape Cod, Massachusetts: Inorganic nitrogen species, 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 285-292.

Smith, R.L., Böhlke, 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.

Revesz, K., Böhlke, J.K., Smith, R.L., and Yoshinari, T., 1999, Stable isotope composition of dissolved O2 undergoing respiration in a ground water contaminant plume, 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 323-328.

Miller, D.N., Smith, R.L., and Böhlke, J.K., 1999, Nitrification in a shallow, nitrogen-contaminated aquifer, 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 329-336.

LeBlanc, D.R., Hess, K.M., Kent, D.B., Smith, R.L., Barber, L.B., Stollenwerk, K.G., and Campo, K.W., 1999, Natural restoration of a sewage plume in a sand and gravel aquifer, 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 245-260.

Böhlke, J.K., Smith, R.L., Coplen, T.B., Busenberg, E., and LeBlanc, D.R., 1999, Recharge conditions and flow velocities of contaminated and uncontaminated ground waters at Cape Cod, Massachusetts: Evaluation of d2H, d18O, and dissolved gasses, 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 337-348.

Bekins, B.A., Baehr, A.L., Cozzarelli, I.M., Essaid, H.I., Haack, S.K., Harvey, R.W., Smith, J.A., and Smith, R.L., 1999, Capabilities and challenges of natural attenuation in the subsurface: Lessons from the U.S. Geological Survey Toxics Substances Hydrology Program, 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 37-56.

Krueger, C.J., Radakovich, K.M., Sawyer, T.E., Barber, L.B., Smith, R.L., and Field, J.A., 1998, Biodegradation of the surfactant linear alkylbenzenesulfonate in sewage-contaminated groundwater: A comparison of column experiments and field tracer tests: Environmental Science and Technology, v. 32, p. 3954-3961. [Link]

Smith, R.L., and Garabedian, S. P., 1998, Using transport model interpretations of tracer tests to study microbial processes in groundwater, in: A.L. Koch, J. A. Robinson and G. A. Milken, eds., Mathematical Models: Applications to Microbial Ecology. Chapman and Hall, pp 94-123.

Smith, R.L., 1997, Determining the terminal electron-accepting reaction in the saturated subsurface, in C. J. Hurst, G. Knudsen, M. McInerney, L. D. Stetzenbach, and M. Walter, eds., Manual of Environmental Microbiology, ASM Press, Washington, D.C., p. 577-585.

Smith, R.L., Garabedian, S.P., and Brooks, M. L., 1996, Comparison of denitrification activity measurements in ground water using cores and natural gradient tracer tests: Environmental Science and Technology, v. 30, p. 3448-3456. [Link]

Reilly, T.E., LeBlanc, D.L., Bussey, K.W., Councell, T.B., Smith, R.L., and Böhlke, J.K., 1996, Chemical and stable-isotope data from an experiment to examine temporal variability in water samples from screened wells on Cape Cod, Massachusetts, 1994, U.S. Geological Survey Open-File Report 95-734.

Smith, R.L., Ceazan, M. L., and Brooks, M. H., 1994, Autotrophic, hydrogen-oxidizing denitrifying bacteria in groundwater, potential agents for bioremediation of nitrate contamination: Applied and Environmental Microbiology, v. 60, p. 1949-1955. [Link]

Spaulding, S. A., McKnight, D. M., Smith, R.L., and Dufford, R., 1994, Phytoplankton population dynamics in perennially ice-covered Lake Fryxell, Antarctica: Journal of Plankton Research, v. 16, p. 527-541.

Thiem, S. M., Krumme, M. L., Smith, R.L., and Tiedje, J. M., 1994, Use of molecular techniques to evaluate the survival of a microorganism injected into an aquifer: Applied and Environmental Microbiology, v. 60, p. 1059-1067. [Link]

Krumme, M. L., Smith, R.L., Egestorff, J., Thiem, S. M., Tiedje, J. M., Timmis, K. N., and Dwyer, D., 1994, Behavior of pollutant-degrading microorganisms in aquifers: Predictions for genetically engineered organisms: Environmental Science and Technology, v. 28, p. 1134-1138. [Link]

Metge, D. W., Brooks, M. H., Smith, R.L., and Harvey, R. W., 1993, Effect of organic contamination upon bacterial energy charge, adenylates, and DNA in a shallow, sandy aquifer on Cape Cod: Applied and Environmental Microbiology, v. 59, p. 2304-2310. [Link]

McKnight, D. M., Smith, R.L., Harnish, R. A., Miller, C. L., and Bencala, K. E., 1993, Seasonal relationships between planktonic microorganisms and dissolved organic material in an alpine stream: Biogeochemistry, v. 21, p. 39-59. [Link]

Smith, R.L., Miller, L. G., and Howes, B. L., 1993, The geochemistry of methane in Lake Fryxell, an amictic, permanently ice-covered, antarctic lake: Biogeochemistry, v. 21, p. 95-115. [Link]

Oremland, R. S., Miller, L. G., Culbertson, C. W., Robinson, S. W., Smith, R.L., Lovley, D. R., Whiticar, M. J., King, G. M., Kiene, R. P., Iversen, N., and Sargent, M., 1993, Aspects of the biogeochemistry of methane in Mono Lake and the Mono Basin of California, in R. S. Oremland, ed., Biogeochemistry of Global Change: Radiatively Active Trace Gases. Chapman and Hall, New York, p. 704-741.

Brooks, M. H., Smith, R.L., and Garabedian, S. P., 1993, Small-scale tracer tests applied to the measurement of in situ denitrification rates in a sewage-contaminated aquifer, Cape Cod, Massachusetts, in G. E. Mallard, ed., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations 94-4015, p. 243-248.

Brooks, M. H., Smith, R.L., and Macalady, D. L., 1992, Inhibition of existing denitrification enzyme activity by chloramphenicol: Applied and Environmental Microbiology, v. 58, p. 1746-1753. [Link]

Smith, R.L., Brooks, M. H., and Ceazan, M. L., 1992, The use of natural gradient tracer tests to identify and quantify microbial processes occurring in groundwater, in J. A. Stanford and J. J. Simon (eds.) Proceedings of the First International Conference on Ground Water Ecology: American Water Resources Association, p. 59-65.

McKnight, D. M., Aiken, G. R., and Smith, R.L., 1991, Aquatic fulvic acids in microbially-based ecosystems: Results from two antarctic desert lakes: Limnology and Oceanography, v. 36, p. 998-1006. [Link]

Smith, R.L., Howes, B.L., and Garabedian, S.P., 1991, In situ measurement of methane oxidation in groundwater using natural gradient tracer tests: Applied and Environmental Microbiology, v. 57, p. 1997-2004. [Link]

Smith, R.L., Howes, B.L., and Duff, J.H., 1991, Denitrification in nitrate-contaminated groundwater: Occurrence in steep vertical geochemical gradients. Geochimica et Cosmochimica Acta, v. 55, p. 1815-1826. [Link]

Smith, R.L., Harvey, R.W., and LeBlanc, D.R., 1991, Importance of close-interval vertical sampling in delineating chemical and microbiological gradients in groundwater studies: Journal of Contaminant Hydrology, v. 7, p. 285-300. [Link]

Krumme, M.L., Smith, R.L., and Dwyer, D.F., 1991, Survival of a model pollutant-degrading microorganism in a sand and gravel aquifer and in microcosms, in G.E. Mallard, ed., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Monterey, California, March 11-15, 1991: U.S. Geological Survey Water-Resources Investigations. 91-4034. pp 144-147.

Smith, R.L., and Ceazan, M.L., 1991, Isolation and characterization of autotrophic, hydrogen-oxidizing denitrifying bacteria from groundwater as potential agents for bioremediation of nitrate contamination, in G.E. Mallard, ed., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Monterey, California, March 11-15, 1991: U.S. Geological Survey Water-Resources Investigations. 91-4034. pp 123-127.

Smith, R.L., Howes, B.L., and Duff, J.H., 1991, The effect of denitrification on nitrogen geochemistry in a nitrate-contaminated sand and gravel aquifer, Cape Cod, Massachusetts, in G.E. Mallard, ed., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Monterey, California, March 11-15, 1991: U.S. Geological Survey Water-Resources Investigations, 91-4034, pp 128-134.

Krumme, M.L., Smith, R.L., and Dwyer, D.F., 1991, Development of microcosms designed to evaluate the effects of adding microorganisms to aquifers as bioremediation agents, in C.B. Fliermans and T.C. Hazen (eds.), Proceedings of the First International Symposium on Microbiology of the Deep Subsurface, WSRC Information Services, Aiken, SC, p. 7-117 to 7-128.

Smith, R.L., and Harvey, R. W., 1991, Development of sampling techniques to measure in situ rates of microbial processes in a contaminated sand and gravel aquifer, in C. B. Fliermans and T. C. Hazen (eds.), Proceedings of the First International Symposium on Microbiology of the Deep Subsurface: WSRC Information Services, Aiken, SC, p. 2-19 to 2-33.

Howes, B.L., and Smith, R.L., 1990, Sulfur cycling in a permanently ice covered amictic antarctic lake, Lake Fryxell: Antarctic Journal of the U.S., v. 25, p. 230-233.

Smith, R.L., and Howes, B.L., 1990, Bacterial biomass and heterotrophic activity in the water column of an amictic antarctic lake: Antarctic Journal of the U.S., v. 25, p. 233-235.

McKnight, D.M., Smith, R.L., Bradbury, J.P., Baron, J.J., and Spaulding, S., 1990, Phytoplankton dynamics in Rocky Mountain lakes, Colorado, U.S.A.: Arctic and Alpine Research, v. 22, p. 264-274. [Link]

Ceazan, M.L., Thurman, E.M., and Smith, R.L., 1989, Cation exchange as a retardation mechanism in an ammonium and nitrate-contaminated sand and gravel aquifer: Environmental Science and Technology, v. 23, p. 1402-1408. [Link]

Harvey, R.W., George, L.H., Smith, R.L., and LeBlanc, D.R., 1989, Transport of microspheres and indigenous bacteria through a sandy aquifer: Results of natural and forced-gradient groundwater tracer experiments: Environmental Science and Technology, v, 23, p. 51-56. [Link]

Brooks, M.H., and Smith, R.L., 1989, Total adenylate and adenylate energy charge measurements from bacterial communities in ground water, in G.E. Mallard and S.E. Ragone, ed., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Phoenix, Arizona, September 26-30, 1988: USGS Water-Resources Investigations Report 88-4220, pp. 541-545.

Smith, R.L., Howes, B.L., and Duff, J.H., 1989, The use of tracer tests to measure the transport and consumption of methane in a contaminated aquifer, in G.E. Mallard and S.E. Ragone, eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Phoenix, Arizona, Sept. 26-30, 1988: U.S. Geological Survey Water-Resources Investigations Report 88-4220, pp. 167-175.

McKnight, D.M., Aiken, G.R., Andrews, E.D., Bowles, E.C., and Smith, R.L., 1988, Dissolved organic material in desert lakes in the McMurdo Dry Valleys: Antarctic Journal of the U.S., v. 23, p. 152-153.

McKnight, D.M., Miller, C., Smith, R.L., Baron, J., and Spaulding, S., 1988, Phytoplankton populations in lakes in Loch Vale, Rocky Mountain National Park, Colorado: Sensitivity to acidic conditions and nitrate enrichment: U.S. Geological Survey Water-Resources Investigations Report, 88-4115.

Smith, R.L., and Duff, J.H., 1988, Denitrification in contaminated groundwater: Applied and Environmental Microbiology, v. 54, p. 1071-1078. [Link]

Oremland, R.S., Cloern, J.E., Sofer, Z., Smith, R.L., Culbertson, C.W., Zehr, J., Miller, L., Cole, B., Harvey, R., Iversen, N., Klug, M., DesMarais, D.J., and Rau, G., 1988, Biogeochemistry and microbial processes of Big Soda Lake, Nevada, in K. Kelts, ed., Lacustrine Petroleum Source Rocks: Geologic Society of London.

Tarafa, M.E., Whelan, J.K., Oremland, R.S., and Smith, R.L., 1987, Evidence for microbiological activity in Leg 95 (New Jersey Transect) sediments, in C.W. Poag, A.B. Watts, et al., eds., Initial Reports of the Deep Sea Drilling Project, v. 95, p. 635-640.

Smith, R.L., and Oremland, R.S., 1987, Bacterial activities in the water column of Big Soda Lake. II. Sulfate reduction: Limnology and Oceanography, v. 32, p. 794-803. [Link]

Smith, R.L., and Klug, M.J., 1987, Flow-through flasks to study microbial metabolism in whole sediments: Applied and Environmental Microbiology, v. 53, p. 371-374. [Link]

Whelan, J.K., Oremland, R.S., Tarafa, M., Smith, R.L., Howarth, R., and Lee, C., 1986. Evidence for sulfate reducing and methane-producing microorganisms in sediments from sites 618, 619, and 622, in A.H. Bowman, J.M. Coleman, and A.W. Meyer, eds., Initial Reports of the Deep Sea Drilling Project, v. 96, p. 767-775.

McKnight, D. M., Brenner, M., Smith, R.L., and Baron, J., 1986, Seasonal changes in phytoplankton populations and related chemical and physical characteristics in lakes in Lock Vale, Rocky Mountain National Park, Colorado: U.S. Geological Survey Water-Resources Investigations Report 86-4101.

Oremland, R.S., Smith, R.L., and Culbertson, C., 1985, Aspects of the biogeochemistry of Big Soda Lake, Nevada, in D.E. Caldwell, J.A. Brierley, and C.L. Brierley, eds., Planetary Ecology, Van Nostrand Reinhold Co., New York, pp. 81-88.

Smith, R.L., Strohmaier, F.E., and Oremland, R.S., 1985, Isolation of anaerobic oxalate-degrading bacteria from freshwater lake sediments: Archive for Microbiology, v. 141, p. 8-13. [Link]

Harvey, R.W., Smith, R.L., and George, L., 1984, Effect of organic contaminants upon microbial distribution and heterotrophic uptake in a Cape Cod Massachusetts aquifer: Applied and Environmental Microbiology, v. 48, p. 1197-1202. [Link]

Oremland, R.S., Umberger, C., Culbertson, C.W., and Smith, R.L., 1984, Denitrification in San Francisco Bay Intertidal Sediments: Applied and Environmental Microbiology, v. 47, p. 1106-1112. [Link]

Harvey, R.W., Smith, R.L., and George, L., 1984, Microbial distribution and heterotrophic uptake in sewage-contaminated groundwater, in D.R. LeBlanc, ed., Movement and fate of solutes in a plume of sewage-contaminated groundwater, Cape Cod, Massachusetts: U.S. Geological Survey Toxic Waste Groundwater Contamination Program. U.S. Geological Survey Open-File Report 84-475, pp. 137-152.

Smith, R.L., and Duff, J.H., 1984, A preliminary study of denitrification in a plume of sewage-contaminated groundwater, in D.R. LeBlanc, ed., Movement and fate of solutes in a plume of sewage-contaminated groundwater, Cape Cod, Massachusetts: U.S. Geological Survey Toxic Waste Groundwater Contamination Program. U.S. Geological Survey Open-File Report 84-475, pp. 153-175.

Smith, R.L., and Oremland, R.S., 1983, Anaerobic oxalate degradation: Widespread natural occurrence in aquatic sediments: Applied and Environmental Microbiology, v. 46, p. 106-113. [Link]

Herrick, C.J., Goodman, E.D., Guthrie, C.A., Blythe, R.H., Hendrix, G.A., Smith, R.L., and Galloway, J.E., 1982, A model of mercury contamination in a woodland stream: Ecological Modeling, v. 15, p. 1-28.

Smith, R.L., and Klug, M.J., 1981, Electron donors utilized by sulfate-reducing bacteria in eutrophic lake sediments: Applied and Environmental Microbiology, v. 42, p.116-121. [Link]

Smith, R.L., and Klug, M.J., 1981, Reduction of sulfur compounds in the sediments of a eutrophic lake basin: Applied and Environmental Microbiology, v. 41, p. 1230-1237. [Link]






                           

My Science Topics


Science Topic
Subtopic
Water Resourcesaquifers
Water Resourcesground water
Water Resourcesground-water quality
Water Resourcessurface water quality
Water Resourceswater quality
Ecology and Environmentaquatic ecosystems
Ecology and Environmentfreshwater ecosystems
Environmental Issuescontamination and pollution
Environmental Issuesground-water quality
Environmental Issuessurface water quality
Environmental Issueswaste treatment and disposal
Environmental Issueswater quality



My USGS Science Strategy Areas

Climate Variability & Change

Energy & Minerals for America's Future

Biogeochemistry of Carbon and Nitrogen in Aquatic Environments

Biogeochemical processes control the cycling and flux of carbon, nitrogen and energy in aquatic environments.  My research characterizes and quantifies processes mediated by microorganisms within the context of the in situ environment, delineating the physical, geochemical, and biological factors that dictate and determine the extent to which a process functions within a given set of conditions.  The approach integrates field and laboratory studies to examine biogeochemical processes affecting C and N cycling, the interaction between these processes, and the impact the processes have upon aqueous geochemistry.  The objectives are to study the mechanisms, pathways, and rates of transformation of carbon and nitrogen compounds (natural and contaminant) mediated by microorganisms; to identify some of the factors controlling these transformations; and to examine the effect that these transformations have upon other biogeochemical processes.  I study both pristine and human-impacted environments and utilize a range of analytical, microbiological and tracer-based techniques.  Current areas of investigation include: fate and transport of inorganic nitrogen cycling in groundwater at the Cape Cod Toxics Substances Hydrology field site; mineralization of organic nitrogen and turnover of inorganic nitrogen in stream channels of the Yukon River Basin and the relationship between N cycling and carbon flux; release and fate of inorganic nitrogen in coal bed methane production water into stream drainage channels; and processes affecting inorganic nitrogen loads in Midwestern streams that have been heavily impacted by agricultural practices.


Contact Information

Richard Smith
3215 Marine Street, Suite E-127
Boulder, CO 80303
rlsmith@usgs.gov
303-541-3032
303-541-3084 - Fax
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