Current Research

• My primary personal research focus is NED, a set of decision-support tools for forest management for multiple benefits. Other research interests include biotic disturbances in forests, regeneration dynamics, stand development, and the roles of humans in the ecosystem.
• I have active studies examining the effects of various silvicultural practices on several different components of the forest, including the trees, vascular flora, deer browsing, and salamanders.
• I am participating in several studies of beech bark disease, focusing on its effects on the composition and structure of the residual forest.
• I have ongoing work addressing public participation in forest planning activities.
• I am active in working with educators to develop environmental literacy components to public school curricula. I have collaborative studies working with managers of reservoirs and city parks to develop forest management plans for their properties.

Research Interests

• Develop integrated decision-support systems for forest management for multiple benefits.
• Investigate relative effects of different silvicultural systems for a variety of forest benefits.
• Provide tools for urban forest managers to evaluate alternative management activities on their forested properties

Education

• Yale University, School of Forestry & Environmental Studies, Ph.D. Silviculture 1987
• University of Massachusetts at Amherst, M.S. Forest Ecology 1983
• Oberlin College, A.B. Theater Arts 1972

Featured Publications & Products

• Twery, Mark J.; Weiskittel, Aaron R. 2013. Forest-management modelling.
• Twery, Mark J.; Olson, Elizabeth; Wade, Gary L.; Rechlin, Michael. 2013. Changes in abundance of vascular plants under varying silvicultural systems at the Forest Ecosystem Research and Demonstration Area, Paul Smiths, New York.
• Twery, Mark J.; Knopp, Peter D.; Thomasma, Scott A.; Nute, Donald E. 2012. NED-2 reference guide.
• Twery, Mark J.; Knopp, Peter D.; Thomasma, Scott A.; Nute, Donald E. 2011. NED-2 User's Guide.
• Meador, Cassie; Twery, Mark; Leatherbury, Meagan. 2011. Moving Field Guides.
• Twery, Mark J.; Hildreth, Sandra J.; Evans, Celia A. 2008. Bringing the northern forest to your classroom.
• Janowiak, Maria K.; Swanston, Christopher W.; Nagel, Linda M.; Webster, Christopher R.; Palik, Brian J.; Twery, Mark J.; Bradford, John B.; Parker, Linda R.; Hille, Andrea T.; Johnson, Sheela M. 2011. Silvicultural decisionmaking in an uncertain climate future: a workshop-based exploration of considerations, strategies, and approaches.
• Evans, Celia A.; Lucas, Jennifer A. ; Twery, Mark J. 2005. Beech Bark Disease: Proceedings of the Beech Bark Disease Symposium.
• Knopp, Peter D.; Twery, Mark J. 2006. NEDLite user's manual: forest inventory for Palm OS handheld computers.

Publications

• Zald, Harold S.J.; Spies, Thomas A.; Harmon, Mark E.; Twery, Mark J. 2016. Forest carbon calculators: a review for managers, policymakers, and educators.
• Hennigar, Chris; Amos-Binks, Luke; Cameron, Ryan; Gunn, John; MacLean, David A.; Twery, Mark. 2013. ForGATE - A Forest Sector Greenhouse Gas Assessment Tool for Maine: Calibration and Overview.
• Garnas, Jeffrey R.; Houston, David R.; Twery, Mark J.; Ayres, Matthew P.; Evans, Celia. 2013. Inferring controls on the epidemiology of beech bark disease from spatial patterning of disease organisms.
• Berven, Kate; Kenefic, Laura; Weiskittel, Aaron; Twery, Mark; Wilson, Jeremy. 2013. The lost research of early northeastern spruce-fir experimental forests: a tale of lost opportunities.
• McIntosh, B. S.; Ascough II, J. C.; Chen, S.; Chew, J.; Cuddy, S.; Elmahdi, A.; Haase, D.; Harou, J.; Hepting, D.; Jakeman, A. J.; Kassahun, A.; Lautenbach, S.; Matthews, K.; Merritt, W.; Quinn, N. W. T.; Rodriguez-Roda, I.; Sieber, S.; Stavenga, M.; Sulis, A.; Ticehurst, J.; Twery, M. J.; Volk, M.; Wrobel, M.; van Delden, H.; El-Sawah, S.; Rizzoli, A.; Voinov, A. 2011. Environmental decision support systems (EDSS) development - Challenges and best practices.
• Dennis, Donald F.; Twery, Mark J. 2007. Choice modeling: public preferences for enhancing benefits from private forests in the Adirondacks.
• Nute, Donald; Potter, Walter D.; Cheng, Zhiyuan; Dass, Mayukh; Glende, Astrid; Maierv, Frederick; Routh, Cy; Uchiyama, Hajime; Wang, Jin; Witzig, Sarah; Twery, Mark; Knopp, Peter; Thomasma, Scott; Rauscher, H. Michael. 2005. A method for integrating multiple components in a decision support system.
• Kenefic, Laura S.; Twery, Mark J., eds. 2005. Changing Forests - Challenging Times: Proceedings of the New England Society of American Foresters 85th Winter Meeting.
• Twery, Mark J.; Knopp, Peter D.; Thomasma, Scott A.; Rauscher, H. Michael; Nute, Donald E.; Potter, Walter D.; Maier, Frederick; Wang, Jin; Dass, Mayukh; Uchiyama, Hajime; Glende, Astrid; Hoffman, Robin E. 2005. NED-2: A decision support system for integrated forest ecosystem management.
• Twery, Mark J.; Knopp, Peter D.; Thomasma, Scott A.; Rauscher, H. Michael; Nute, Donald E.; Potter, Walter D.; Maier, Frederick; Wang, Jin; Dass, Mayukh; Uchiyama, Hajime; Glende, Astrid; Hoffman, Robin E. 2005. NED-2: a decision support system for integrated forest ecosystem management.
• Houston, David R.; Rubin, Benjamin D.; Twery, Mark J.; Steinman, James R.; Steinman, James R. 2005. Spatial and Temporal Development of Beech Bark Disease in the Northeastern United States.
• Dennis, Donald F.; Twery, Mark J.; Rechlin, Michael A.; Hansen, Bruce. 2005. Survey Techniques for Assessing Public Preferences for Alternate Silvicultural Treatments in the Adirondacks.
• Evans, Celia; Ayres, Matthew; Twery, Mark; Houston, David R.; Liebhold, Andrew; Liebhold, Andrew. 2005. Using Models to Identify Forests at Risk of Major Structure and Compositional Change due to Beech Bark Disease.
• Ward, Jeffrey S.; Twery, Mark J., eds. 2004. Forestry Across Borders: Proceedings of the New England Society of American Foresters 84th Winter Meeting.
• Twery, Mark J. 2004. Modelling in forest management.
• Knopp, Peter D.; Twery, Mark J. 2004. NED Software for Sustainable Forest Management: New Developments.
• Twery, Mark; Northrop, Robert. 2004. Watershed forest management using decision support technology.
• Nute, Donald; Potter, Walter D.; Dass, Mayukh; Glende, Astrid; Maier, Frederick; Uchiyama, Hajime; Wang, Jin; Twery, Mark; Knopp, Peter; Thomasma, Scott; Rauscher, H. Michael. 2003. An agent architecture for an integrated forest ecosystem management decision support system.
• Dennis, Donald F.; Twery, Mark J.; Rechlin, Michael A.; Hansen, Bruce. 2003. Public attitudes toward programs designed to enhance forest related benefits on private lands.
• Guldin, James M.; Cawrse, David; Graham, Russell; Hemstrom, Miles; Joyce, Linda; Kessler, Steve; McNair, Ranotta; Peterson, George; Shaw, Charles G.; Stine, Peter; Twery, Mark; Walter, Jeffrey. 2003. Science Consistency Reviews A Primer for Application.
• Knopp, Peter D.; Twery, Mark J. 2003. Stewplan: software for creating forest stewardship plans (Version 1.3).
• Guldin, James M.; Cawrse, David; Graham, Russell; Hemstrom, Miles; Joyce, Linda; Kessler, Steve; McNair, Ranotta; Peterson, George; Shaw, Charles G.; Stine, Peter; Twery, Mark; Walter, Jeffrey. 2003. The Science Consistency Review A Tool To Evaluate the Use of Scientific Information in Land Management Decisionmaking.
• Wade, Gary L.; Myers, Jonathan A.; Martin, Cecilia R.; Detmar, Kathie; Mator, William, III; Twery, Mark J.; Rechlin, Mike. 2003. Vascular Plant Species of the Forest Ecology Research and Demonstration Area, Paul Smith's, New York.
• Nute, Donald; Potter, Walter D.; Maier, Frederick; Wang, Jin; Twery, Mark; Rauscher, H. Michael; Knopp, Peter; Thomasma, Scott; Dass, Mayukh; Uchiyama, Hajime. 2002. Intelligent Model Management in a Forest Ecosystem Management Decision Support System.
• Twery, Mark J.; Rauscher, H. Michael. 2002. NED Software for Forest Management: Much More Than Cruising.
• Rauscher, H. Michael; Spearman, John E., Jr..; Fout, C. Preston; Giles, Robert H.; Twery, Mark J. 2001. Talking high-tech turkey: USDA uses new software to analyze habitat management scenarios.
• More, Thomas A.; Twery, Mark J. 2001. The forest service's recreation agenda: comments on the roles of research and state and private forestry in the Northeast.
• Rauscher, H. Michael; Lloyd, F. Thomas; Loftis, David L.; Twery, Mark J. 2000. A Practical Decision-Analysis Process for Forest Ecosystem Management.
• Rauscher, H. Michael; Plant, Richard E.; Thomson, Alan J.; Twery, Mark J. 2000. Foreword.
• Twery, Mark J.; Rauscher, H. Michael; Bennett, Deborah J.; Thomasma, Scott A.; Stout, Susan L.; Palmer, James F.; Hoffman, Robin E.; DeCalesta, David S.; Gustafson, Eric; Cleveland, Helene; Grove, J. Morgan; Nute, Donald; Kim, Geneho; Kollasch, R. Peter. 2000. NED-1: integrated analyses for forest stewardship decisions.
• Twery, Mark J. ; Rauscher, H. Michael; Bennett, Deborah J.; Thomasma, Scott A.; Stout, Susan L.; Palmer, James F.; Hoffman, Robin E.; DeCalesta, David S.; Gustafson, Eric; Grove, J. Morgan; Nute, Donald; Kim, Geneho; Kollasch, R. Peter. 2000. NED-1: integrated analyses for forest stewardship decisions.
• Nute, Donald; Kim, Geneho; Potter, Walter D.; Twery, Mark J.; Rauscher, H. Michael; Thomasma, Scott; Bennett, Deborah; Kollasch, Peter. 1999. A Multi-criterial Decision Support System for Forest Management.
• Reynolds, Keith; Bjork, Jennifer; Hershey, Rachel Riemann; Schmoldt, Dan; Payne, John; King, Susan; DeCola, Lee; Twery, Mark J.; Cunningham, Pat. 1999. Decision Support for Ecosystem Management (Chapter 28).
• Hoffman, Robin E.; Twery, Mark J.; Alban, Laura M.; Nyland, Ralph D. 1999. Forests and People.
• Thomasma, Scott A.; Thomasma, Linda Ebel; Twery, Mark J. 1998. NEWILD (version 1.0) user's manual Computer program.
• Yanai, Ruth D.; Twery, Mark J.; Stout, Susan L. 1998. Woody understory response to changes in overstory density: thinning in Allegheny hardwoods.
• Mowrer, H. Todd; Barber, Klaus; Campbell, Joe; Crookston, Nick; Dahms, Cathy; Day, John; Laacke, Jim; Merzenich, Jim; Mighton, Steve; Rauscher, Mike; Sojda, Rick; Thompson, Joyce; Trenchi, Peter; Twery, Mark. 1997. Decision support systems for ecosystem management: An evaluation of existing systems.
• Alban, Laura Miller; Thomasma, Scott A.; Twery, Mark J. 1995. Forest Stewardship Planning Guide (version l.00) user's manual (Computer Program).
• Simpson, Brian T.; Kollasch, R. Peter; Twery, Mark J.; Schuler, Thomas M. 1995. NED/SIPS user's manual: Northeast decision model stand inventory processor and simulator (Version 1.00) (Computer program).
• Muzika, R. M.; Twery, M. J. 1995. Regeneration in defoliated and thinned hardwood stands of north-central West Virginia.
• Feicht, David L.; Fosbroke, Sandra L. C.; Twery, Mark J. 1993. Forest stand conditions after 13 years of gypsy moth infestation.
• Gottschalk, Kurt W.; Twery, Mark J.; [Editors], . 1992. Proceedings U. S. Department of Agriculture Interagency gypsy moth research forum 1992; 1992 January 13-16; Annapolis, MD..
• Gottschalk, Kurt W.; Twery, Mark J.; [Editors], . 1992. Proceedings U.S. Department of Agriculture interagency gypsy moth research forum 1991; 1991 January 14-17; Annapolis, MD..
• Twery, Mark J.; Wargo, Philip M. 1991. Development of a sampling system for Armillaria rhizomorphs in mixed oak stands: a progress report.
• Twery, Mark J. 1991. Effects of defoliation by gypsy moth.
• Hollenhorst, S.J.; Brock, S.M.; Freimund, W.A.; Twery, M.J. 1991. Effects of gypsy moth infestation on near-view aesthetic preferences and recreation behavior intentions.
• Twery, Mark J.; Elmes, Gregory A. 1991. Hazard rating for gypsy moth on a Macintosh computer: a component of the GypsES system.
• Gottschalk, Kurt W.; Twery, Mark J.; Smith, Shirley I.; [Editors], . 1991. Proceedings, U. S. Department of Agriculture interagency gypsy moth research review 1990.
• Twery, M.J. 1991. Understory composition of hardwood stands in north central West Virginia.
• Twery, Mark J.; Mason, Garland N.; Wargo, Philip M.; Gottschalk, Kurt W. 1990. Abundance and distribution of rhizomorphs of Armillaria spp. in defoliated mixed oak stands in western Maryland.
• Gottschalk, Kurt W.; Twery, Mark J. 1989. Gypsy moth impacts in pine-hardwood mixtures.
• Twery, Mark J.; Patterson, W.A., III. 1983. Effects of species composition and site factors on the severity of beech bark disease in western Massachusetts and the White Mountains of New Hampshire: a preliminary report.

Research Highlights

Highlight	Title	Year
NRS-2011-17	Moving Field Guides: Learning ecology through dance Children in Baltimore, MD, are working with Forest Service researchers and the Dance Exchange, a professional dance company, to turn their obser ...	2011