Michael Keller
Complex Systems Research Center
Morse Hall
University of New Hampshire
Durham, NH 03824, USA
Telephone: 603-862-4193
Facsimile: 603-862-0188
E-mail: lba.ecology@unh.edu
Recent Employment
Visiting Research Associate Professor, University of New Hampshire, October 1997 to present.
Research Physical Scientist, International Institute of Tropical Forestry, USDA Forest Service, April 1992 to present.
Post-Doctoral Fellow, National Center for Atmospheric Research, June 1990 to April 1992.
Post-Doctoral Fellow, Botany Department, University of Wyoming, December 1989 to June 1990.
Education
Ph.D. June 1990. Department of Geological and Geophysical Sciences, Princeton University.
---Dissertation Title: Biological Sources and Sinks of Methane in Tropical Habitats and Tropical Atmospheric Chemistry.
A.B. summa cum laude, June 1982. Harvard College. Geology.
Languages: English, Spanish, and Portuguese
Selected Publications
Keller, M. and Lerdau, M.T. In press. Isoprene Emission from Tropical Canopy Leaves. Global Biogechemical Cycles
Veldkamp, E., E.A. Davidson, H.E. Erickson, M. Keller, and A. Weitz. In press. Soil nitrogen cycling and nitrogen oxide emissions along a pasture chronosequence in the humid tropics of Costa Rica. Soil Biology and Biochemistry.
Mosier, A.R., J.A. Delgado, and M. Keller. 1998. Methane and nitrous oxide fluxes in an acid oxisol in Western Puerto Rico: Impact of tillage, liming, and fertilization. Soil Biology and Biochemistry. 30:2087-2098.
Reiners, W.A., M. Keller, and K. Gerow. 1998. Estimating rainy season nitrous oxide and methane fluxes across forest and pasture landscapes in Costa Rica. Water Air and Soil Pollution. 105:117-130.
Veldkamp, E., Keller, M. and Nuñez, M., 1998. Effects of pasture management on N2O and NO emissions from soils in the humid tropics of Costa Rica. Global Biogeochemical Cycles. 12: 71-79.
Weitz, A.M., Veldkamp, E., Keller, M., Neff, J. and Crill, P.M. 1998. Nitrous oxide, nitric oxide, and methane fluxes from soils following clearing and burning of tropical secondary forest. Journal of Geophysical Research 103:28047-28058.
Veldkamp E. and Keller, M., 1997. Nitrogen oxide emissions from a banana plantation in the humid tropics. Journal of Geophysical Research. 102:15,889-15,898.
Weitz, A.M, Grauel W.T., Keller, M., and Veldkamp, E. 1997. Calibration of time domain reflectometry technique using undisturbed soil samples from humid tropical soils of volcanic origin. Water Resources Research, 33:1241-1249.
Erickson, H.E., and Keller, M., 1997. Tropical land use change and soil emission of nitrogen oxides. Soil Use and Management. 13:278-287.
Keller, M, Clark, D.A, Clark D.B., Weitz, A.M. and Veldkamp, E., 1996. If a tree falls in the forest... Science, 273:201.
Neff, J., Keller, M., Holland, E., Weitz, A., and Veldkamp, E., 1995. Fluxes of nitric oxide following clearing and burning of a tropical rain forest. Journal of Geophysical Research, 100:25913-25922.
W. F. J. Parsons and Keller, M. 1995. Controls on nitric oxide emissions from tropical pasture and rain forest soils. Biology and Fertility of Soils, 20:151-156.
M. Keller and Stallard, R.F. 1994. Methane emission by bubbling from Gatun Lake, Panama.Journal of Geophysical Research , 99: 8307-8319.
M. Keller and Matson, P. A. 1994. Evaluating the effects of tropical land use changes on atmospheric composition. pp. 103-118 in R. G. Prinn (ed.) Global Atmospheric-Biospheric Chemistry, Plenum Publishing Company, New York.
M. Keller and Reiners, W. A. 1994 Soil-atmosphere exchange of nitrous oxide, nitric oxide, and methane under secondary succession of pasture to forest in the Atlantic lowlands of Costa Rica. Global Biogeochemical Cycles, 8:399-409.
Keller, M. 1994. Controls on soil-atmosphere fluxes of nitrous oxide and methane: Effects of tropical deforestation. pp. 121-138 in R.G. Zepp (ed.) Climate Biosphere Interaction: Biogenic Emissions and Environmental Effects of Climate Change, John Wiley and Sons, New York.
W. A. Reiners, Bouwman, A. F., Parsons, W. F. J., and Keller, M. 1994. Tropical rain forest conversion to pasture: Changes in vegetation and soil properties. Ecological Applications, 4: 363-377.
M. Keller, Veldkamp, E., Weitz, A.M., and Reiners, W.A. 1993. Pasture age effects on soil-atmosphere trace gas exchange in a deforested area of Costa Rica. Nature, 365: 244-246.
W. F. J. Parsons, Mitre, M. E., Keller, M. and Reiners, W. A. 1993. Nitrate limitation of N2O production and denitrification from tropical pasture soils. Biogeochemistry, 22: 179-193.
Keller, M., Jacob, D.J., Wofsy, S.C., and Harriss, R.C. 1991. Effects of tropical deforestation on global and regional atmospheric chemistry. Climatic Change, 19:139-158.
Keller, M., Mitre, M.E., and Stallard, R.F., 1990. Consumption of atmospheric methane in tropical soils: Effects of agricultural development. Global Biogeochemical Cycles, 4:21-27.
Revised 981202