Peter M. Groffman
City University of New York
Advanced Science Research Center
85 St. Nicholas Terrace
New York, NY 10031
Ph.D., University of Georgia, Ecology, 1984;
B.A., University of Virginia, Environmental Science, 1980.
Professor, City University of New York Advanced Science Research Center and Brooklyn College Department of Earth and Environmental Sciences;2015 - current; Assistant (1992), Associate (1993), Full (1996), Senior (2004) Scientist, Senior Research Fellow (2015), Cary Institute of Ecosystem Studies; Assistant Professor, Department of Natural Resources Science, University of Rhode Island, 1987-1991; Postdoctoral Research Associate, Departments of Crop and Soil Science and Microbiology and Public Health, Michigan State University, 1984-1987; Graduate Research Assistant and Graduate Teaching Assistant, Institute of Ecology, University of Georgia, 1984-1987.
Research Interests and Activities:
Peter M. Groffman has worked at the Hubbard Brook Experimental Forest since 1992. His research interests are in soil microbial ecology and carbon and nitrogen dynamics. Specific research efforts include long-term monitoring of soil microbial biomass and activity, investigation of snow depth as a regulator of soil freezing and nitrogen dynamics, the effects of atmospheric nitrogen deposition on nitrogen gas fluxes, and effects of a whole watershed calcium addition on soil nitrogen and carbon cycling.
Distinguished Awards and Memberships:
Groffman is current Chair of the U.S. Long Term Ecological Research network Science Council and was/is a lead author for the 2013 U.S. National Climate Assessment and a member of the U.S. National Committee for Soil Science, the National Science Foundation Long Term Ecological Research Network Executive Board, the NOAA Gulf of Mexico Hypoxia Nutrient Reduction Workgroup and the Working Group on Aquatic Terrestrial Biogeochemistry at the National Center for Ecological Analysis and Synthesis. He was a lead author for the Second (Wetlands) and Third (North America) Assessment Reports of the Intergovernmental Program on Climate Change (IPCC). He currently serves on the editorial boards of Ecology and Ecosystems, and was chair of the Soil Ecology section of the Ecological Society of America from 1997 – 98 and the Wetland Soils Section of the Soil Science Society of America from 2002 - 2003.
Morse, J. L., J. Durán, and P. M. Groffman. 2015. Denitrification and greenhouse gas fluxes in a northern hardwood forest: the importance of snowmelt and implications for ecosystem N budgets. Ecosystems 18:520-532.
Christenson, L.M., M.J. Mitchell, P.M. Groffman and G.M. Lovett. 2014. Cascading effects of climate change on forest ecosystems: Biogeochemical links between trees and moose in the Northeast USA. Ecosystems 17:442-457.
Durán, J., J.L. Morse, P.M. Groffman, J.L. Campbell, L.M. Christenson, C.T. Driscoll, T.J. Fahey, M.C. Fisk, M.C. Fisk and P.H. Templer. 2014. Winter climate change affects growing-season soil microbial biomass and activity in northern hardwood forests. Global Change Biology 20:3568-3577.
Kulkarni, M.V., A.J. Burgin, P.M. Groffman and J.B. Yavitt. 2014. Direct flux and 15N tracer methods for measuring denitrification in forest soils. Biogeochemistry 117:359–373.
Morse, J.L., S.F. Werner, C. Gillin, S.W. Bailey, K.J. McGuire and P.M. Groffman. 2014. Searching for biogeochemical hotspots in three dimensions: soil C and N cycling in hydropedologic units in a northern hardwood forest. Journal of Geophysical Research Biogeosciences. 119:1596-1607.
Morse, J.L., J. Durán, F. Beall, E., I.F. Creed, I.J. Fernandez and P.M. Groffman. 2014. Soil denitrification fluxes from three northeastern North American forests ranging in nitrogen availability. Oecologia 177:17-27.
Wexler, S.K., C.L. Goodale, K.J. McGuire, S.W. Bailey, P.M. Groffman. 2014. Isotopic signals of summer denitrification in a northern hardwood forested catchment. Proceedings of the National Academy of Sciences 111:16413-16418.
Groffman, P.M., L.E. Rustad, P.H. Templer, J.L. Campbell, L.M. Christenson, N.K. Lany, A.M. Socci, M.A. Vadeboncoeur, P.G. Schaberg, G.F. Wilson, C.T. Driscoll, T.J. Fahey, M.C. Fisk, C.L. Goodale, M.B. Green, S.P. Hamburg, C.E. Johnson, M.J. Mitchell, J.L. Morse, L.H. Pardo and N.L. Rodenhouse. 2012. Climate change effects are manifest in complex and surprising ways in the northern hardwood forest. BioScience 62:1056-1066.
Groffman, P.M. and M.C. Fisk. 2011. Calcium constrains plant control over forest ecosystem nitrogen cycling. Ecology 92:2035-2042.
Groffman, P.M. and M.C. Fisk. 2011. Phosphate additions have no effect on microbial biomass and activity in a northern hardwood forest. Soil Biology and Biochemistry 43:2441-2449.
Groffman, P.M., J.P. Hardy, S. Fashu-Kanu, C.T. Driscoll, N.L. Cleavitt, T.J. Fahey and M.C. Fisk. 2010. Snow depth, soil freezing and nitrogen cycling in a northern hardwood forest landscape. Biogeochemistry 102:223-238.
Groffman, P.M., J.P. Hardy, M.C. Fisk, T.J. Fahey and C.T. Driscoll. 2009. Climate variation and nitrogen and carbon cycle processes in a northern hardwood forest. Ecosystems 12: 927-943. DOI: 10.1007/s10021-009-9268-y.
Kulkarni, MV, P.M. Groffman and J.B. Yavitt. 2008. Solving the global nitrogen problem: It's a gas! Frontiers in Ecology and Environment 4:199-206.
Groffman, P.M., M.C. Fisk, C.T. Driscoll, G.E. Likens, T.J. Fahey, C. Eagar and L.H. Pardo. 2006. Calcium additions reduce nitrogen cycling in a northern hardwood forest. Ecosystems 9:1289-1305.
Groffman, P.M., J.P Hardy, C.T. Drisoll and T.J. Fahey. 2006. Snow depth, soil freezing and trace gas fluxes in a northern hardwood forest. Global Change Biology 12:1748-1760.
Groffman, P.M., C.T. Driscoll, G.E. Likens, T.J. Fahey, R.T. Holmes, C. Eagar and J.D. Aber. 2004. Nor gloom of night: A new conceptual model for the Hubbard Brook ecosystem study. BioScience 54:139-148.
Groffman, P.M., C.T. Driscoll, C. Eagar, M.C. Fisk, T.J. Fahey, R.T. Holmes, G.E. Likens and L. Pardo. 2004. A new governance structure for the Hubbard Brook Ecosystem Study. Bulletin of the Ecological Society of America 85:5-6.
Groffman, P.M., C.T. Driscoll, T.J. Fahey, J.P. Hardy, R.D. Fitzhugh and G.L. Tierney. 2001. Colder soils in a warmer world: A snow manipulation study in a northern hardwood forest ecosystem. Biogeochemistry 56:135-150.
Groffman, P.M., C.T. Driscoll, T.J. Fahey, J.P. Hardy, R.D. Fitzhugh and G.L. Tierney. 2001. Effects of mild winter freezing on soil nitrogen and carbon dynamics in a northern hardwood forest. Biogeochemistry 56:191-213.
Bohlen, P.J., P.M. Groffman, T.J. Fahey, C.T. Driscoll and T.G. Siccama. 2001. Plant-soil-microbial interactions in a northern hardwood forest. Ecology 82:965-978.
Role at the Hubbard Brook:
I participate in research on nitrogen gas fluxes, winter climate change, the effects of calcium on watershed processes and long-term monitoring of soil microbial biomass and activity and soil to atmosphere fluxes of nitrous oxide, methane and carbon dioxide. I was Chair of the Hubbard Brook Committee of Scientists Scientific Coordinating Committee from 2003 to 2011.
Title at Hubbard Brook: