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Robert G Wagner

Forestry and Natural Resources 

  • Head and Professor, Department of Forestry & Natural Resources
PFEN Room 125B
715 W. State Street
West Lafayette, IN 47907-2061

Robert Wagner, head and professor, comes to Purdue from the University of Maine, where he was the Henry W. Saunders Distinguished Professor in Forestry and the Director of the Center for Research on Sustainable Forests and Cooperative Forestry Research. He received his bachelor's degree in forest management from Utah State University, his master’s in forest ecology/silviculture from the University of Washington, and his PhD in silviculture/vegetation management from Oregon State University. He served as a program leader and senior scientist at the Ontario Forest Research Institute in Ontario Canada before joining the faculty in the School of Forest Resources at the University of Maine. At Maine he served as Director of the Cooperative Forestry Research Unit, Associate Director of the Forest Bioproducts Research Institute, and Director of the School of Forest Resources prior to his appointment as Distinguished Professor and Director of the Centers.

Dr. Wagner's research career has focused on improving the success of forest regeneration following harvesting, as well as improving the productivity, composition, and quality of young stands. His work in this field has focused on forest ecosystems in the Pacific Northwest, Canada, and New England. Dr. Wagner’s recent efforts have focused on understanding patterns of natural regeneration following partial harvesting of forest stands, the economics and stand dynamics associated with thinning spruce-fir stands, how to improve the quality of hardwood regeneration in diseased beech-dominated stands, and the effects of silvicultural intensity and compositional objectives on stand productivity and dynamics. 

Selected Publications

Wagner, R. G., Dunning, J. B., Farlee, L., Jackson, E. A., Jenkins, M. A., MacGowan, B., . . . Zollner, P. A. (2018). Addressing concerns about management of Indiana’s forests. Department of Forestry and Natural Resources, Purdue University. Retrieved from

Bose, A. K., Weiskittel, A., Kuehne, C., Wagner, R. G., Turnblom, E., & Burkhart, H. E. (2018). Does commercial thinning improve stand-level growth of the three most commercially important softwood forest types in North America? FOREST ECOLOGY AND MANAGEMENT, 409, 683-693. doi:10.1016/j.foreco.2017.12.008

Bose, A. K., Wagner, R. G., Roth, B. E., & Weiskittel, A. R. (2018). Influence of browsing damage and overstory cover on regeneration of American beech and sugar maple nine years following understory herbicide release in central Maine. NEW FORESTS, 49(1), 67-85. doi:10.1007/s11056-017-9605-5

Bose, A. K., Weiskittel, A., & Wagner, R. G. (2017). A three decade assessment of climate-associated changes in forest composition across the north-eastern USA. JOURNAL OF APPLIED ECOLOGY, 54(6), 1592-1604. doi:10.1111/1365-2664.12917

Hiesl, P., Crandall, M. S., Weiskittel, A., Benjamin, J. G., & Wagner, R. G. (2017). Evaluating the long-term influence of alternative commercial thinning regimes and harvesting systems on projected net present value of precommercially thinned spruce-fir stands in northern Maine. CANADIAN JOURNAL OF FOREST RESEARCH, 47(2), 203-214. doi:10.1139/cjfr-2016-0228

Bose, A. K., Weiskittel, A., & Wagner, R. G. (2017). Occurrence, pattern of change, and factors associated with American beech-dominance in stands of the northeastern USA forest. FOREST ECOLOGY AND MANAGEMENT, 392, 202-212. doi:10.1016/j.foreco.2017.03.003

Bose, A. K., Weiskittel, A., Wagner, R. G., & Kuehne, C. (2016). Assessing the factors influencing natural regeneration patterns in the diverse, multi-cohort, and managed forests of Maine, USA. JOURNAL OF VEGETATION SCIENCE, 27(6), 1140-1150. doi:10.1111/jvs.12433

Kuehne, C., Weiskittel, A. R., Wagner, R. G., & Roth, B. E. (2016). Development and evaluation of individual tree- and stand-level approaches for predicting spruce-fir response to commercial thinning in Maine, USA. FOREST ECOLOGY AND MANAGEMENT, 376, 84-95. doi:10.1016/j.foreco.2016.06.013

Nelson, A. S., Wagner, R. G., Day, M. E., Fernandez, I. J., Weiskittel, A. R., & Saunders, M. R. (2016). Light absorption and light-use efficiency of juvenile white spruce trees in natural stands and plantations. FOREST ECOLOGY AND MANAGEMENT, 376, 158-165. doi:10.1016/j.foreco.2016.06.019

Nelson, A. S., Wagner, R. G., Weiskittel, A. R., & Saunders, M. R. (2015). Effects of species composition, management intensity, and shade tolerance on vertical distribution of leaf area index in juvenile stands in Maine, USA. EUROPEAN JOURNAL OF FOREST RESEARCH, 134(2), 281-291. doi:10.1007/s10342-014-0850-2

Forestry and Natural Resources, 715 West State Street, West Lafayette, IN 47907-2061 USA, (765) 494-3590

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