My research interests fall into two basic categories: 1) biogeochemical cycling and 2) soils. With regard to the former, my interests include effects of both regional and global phenomena (such as atmospheric pollution, increased carbon dioxide and climate change) as well as more localized influences (such as harvesting, fire, fertilization) on biochemical cycling, primarily in forest ecosystems. With regard to the latter, my interests include soil-soil solution chemical interactions, factors affecting organic carbon accumulation and loss, nitrogen, sulfur, phosphorus transformations, and trace gas emission from soils.

Oak Ridge National Laboratory:

Eugene P. Wigner Fellowship, 1977-1979
Annual Scientific Achievement Award, Environmental Sciences Division, 1983
Publication Award, Martin Marietta Energy Systems, May 1985

Oak Ridge National Laboratory:

Technical Achievement Award, Martin Marietta Energy Systems, May 1986
Publication Award, Martin Marietta Energy Systems, May 1987

Desert Research Institute/University of Nevada, Reno:

Dandini Medal of Science, October 1993

Outstanding Faculty Member, Board of Regents, University and Community College System of Nevada, March 1997

Regents Researcher Award, Board of Regents, University and Community College System of Nevada, 1999

Outstanding Faculty Member, Board of Regents, University and Community College System of Nevada, March 2000

Caldwell. T.G., D. W. Johnson, W. W. Miller, and R. G. Qualls. 2002. Forest Floor Carbon and Nitrogen Losses Due to Prescription Fire. Soil Sci. Soc. Amer. J. 66:262-267

Johnson, D.W., J.D. Knoepp, W.T. Swank, J. Shan, L.A. Morris, D.H. Van Lear and P.R. Kapeluck. 2002. Effects of Forest Management on Soil Carbon: Results of Some Long-term Resampling Studies. Env. Pollut. 116: S201-S208.

Norby, R.J., D.E. Todd, J. Fults, and D.W. Johnson. 2001. Allometric determination of tree growth in a CO2-enriched sweetgum stand. New Phytol. 150: 477-487.

Johnson, D.W., R.B. Susfalk, R.A. Dahlgren, T.G. Caldewell and W.W. Miller. 2001. Nutrient fluxes in a snow-dominated, semi-arid forest: Spatial and temporal patterns. Biogeochemistry 55:219-245

Johnson, D.W., B.A. Hungate, P. Dijkstra, G. Hymus, and B. Drake. 2001. Effects of Elevated CO2 on Soils in a Florida Scrub Oak Ecosystem. J. Environ. Qual. 30: 501-507.

Johnson, D.W., R.B. Susfalk, H.L. Gholz, and P.J. Hanson. 2001. Simulated effects of temperature and precipitation change in several forest ecosystems. J. Hydrology 235: 183-204.

Johnson, D.W., W. Cheng, and I.C. Burke. 2000. Biotic and Abiotic Nitrogen Retention in a Variety of Forest Soils. Soil Sci. Soc. Amer. J. 64: 1503-1514.

Johnson, D.W., T. Sogn, and S. Kvindesland. 2000. The Nutrient Cycling Model (NuCM): Lessons learned. For. Ecol. Managem. 138: 91-106.

Johnson, D.W., and P.S. Curtis. 2001. Effects of forest management on soil carbon and nitrogen storage: Meta Analysis. For. Ecol. Managem. 140: 227-238.

Shawel, H-M., W. Cheng, D.W. Johnson, J.T. Ball, and E.A. Paul. 2000. Use of carbon-13 and carbon-14 to measure the effects of carbon dioxide and nitrogen fertilization on carbon dynamics in ponderosa pine. Soil Sci. Soc. Amer. J. 64: 1984-1993.

Johnson, D.W., W. Cheng, and J.T. Ball. 2000c. Effects of CO2 and N fertilization on decomposition and N immobilization in ponderosa pine litter. Plant Soil 224: 115-122.

Johnson, D.W., W. Cheng, and J.T. Ball. 2000a. Effects of [CO2] and nitrogen fertilization on soils planted with ponderosa pine. Plant Soil 224: 99-113

Johnson, D.W. 1999. Simulated effects of elevated CO₂ on nitrogen cycling using the NuCM model. Tree Physiol. 19: 321-327.

Johnson, D.W., and D.E. Todd. 1998. The effects of harvesting on long-term changes in nutrient pools in a mixed oak forest. Soil Sci. Soc. Amer. J.62: 1725-1735.

Johnson, D.W., R.B. Thomas, K.L. Griffin, D.T. Tissue, J.T. Ball, B.R. Strain, and R.F. Walker. 1998. Effects of CO₂ and N on growth and N uptake in ponderosa and loblolly pine. J. Environ. Qual. 27: 414-425.

Johnson, D.W., R.B. Susfalk, R.A. Dahlgren, and J.M. Klopatek. 1998. Fire is more important than water for nitrogen fluxes in semi-arid forests. Environ. Sci. Pol. 1: 79-86.

Johnson, D.W., R. B. Susfalk, and R.A. Dahlgren. 1997. Nutrient fluxes in forests of the eastern Sierra Nevada Mountains, USA. Global Biogeochem. Cy. 11: 673-681.

Johnson, D.W., J.T. Ball, and R.F. Walker. 1997. Effects of CO₂ and nitrogen fertilizaton on vegetation and soil nutrient content in juvenile ponderosa pine. Plant Soil 190: 20-40.