Scientists & Staff

Susan Crocker

Research Forester
1992 Folwell Avenue
St. Paul, MN, 55108
Phone: 651-649-5136

Contact Susan Crocker


Current Research

I am a Research Forester in the Northern Research Station's Forest Inventory and Analysis (NRS-FIA) program; NRS-FIA conducts annual inventories of forest land across all ownerships in the 24-state region that encompasses the Northeast, Midwest and Upper Great Plains. I serve as the lead FIA analyst for New Jersey and Illinois, evaluating and reporting on state-level forest conditions and trends. I also serve as regional lead for insect and disease analyses. My current research utilizes a landscape-scale approach to identify the mechanisms that influence insect spread and to assess the impacts of forest insect pests on forest resources. To date, I have focused particularly on the study of the exotic emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), using landscape-level models and geospatial approaches to categorize risk and predict patterns of EAB dispersal.

Research Interests

· Landscape and spatial ecology of forest insects

· Mapping and analyzing forest insect disturbance

· Predicting and preventing establishment of insect pests

· Monitoring impacts of insects pests on plant hosts

Why This Research is Important

Comprehensive forest resource information provides the basis for sound forest policy and management strategies. It also offers a synoptic view of insect activity and the resulting impacts on the structure and composition of forest resources. Landscape-scale approaches that incorporate ground-level forest inventory data can improve our understanding of the influence of forest ecosystems on insect dispersal patterns and subsequent impacts to forest land. This research will provide more effective means of detecting and managing insect pests like EAB, and will inform mitigation strategies designed to slow insect spread and reduce impacts to forest resources.

Professional Organizations

  • Entomological Society of America (2012 - Current)
  • Ecological Society of America (2010 - Current)

Featured Publications & Products

  • Crocker, Susan J.; Meneguzzo, Dacia M.; Liknes, Greg C. 2010. Patterns among the ashes: Exploring the relationship between landscape pattern and the emerald ash borer. In: Michler, Charles H.; Ginzel, Matthew D., eds. 2010. Proceedings of symposium on ash in North America; 2010 March 9-11; West Lafayette, IN. Gen. Tech. Rep. NRS-P-72. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 32-40.
  • Crocker, Susan J.; Liknes, Greg C.; Meneguzzo, Dacia M. 2011. Retrospective analysis of EAB spread: understanding the effect of landscape pattern on invasion and propagation. In: Parra, Gregory; Lance, David; Mastro, Victor; Reardon, Richard; Benedict, Chuck, comps. 2011 emerald ash borer national research and technology development meeting; 2011 October 12-13; Wooster, OH. FHTET-2011-06. Morgantown, WV; U.S. Department of Agriculture, Forest Service, State and Private Forestry, Forest Health Protection, Forest Health Technology Enterprise Team: 122-124.
  • Crocker, Susan J.; Nelson, Mark D.; Barnett, Charles J.; Brand, Gary J.; Butler, Brett J.; Domke, Grant M.; Hansen, Mark H.; Hatfield, Mark A.; Lister, Tonya W.; Meneguzzo, Dacia M.; Perry, Charles H.; Piva, Ronald J.; Wilson, Barry T.; Woodall, Christopher W.; Zipse, Bill. 2011. New Jersey's forests, 2008. Resour. Bull. NRS-59. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 52 p. [DVD included].

Publications & Products

  • Albright, Thomas A.; McWilliams, William H.; Widmann, Richard H.; Butler, Brett J.; Crocker, Susan J.; Kurtz, Cassandra M.; Lehman, Shawn; Lister, Tonya W.; Miles, Patrick D.; Morin, Randall S.; Riemann, Rachel; Smith, James E. 2017. Pennsylvania forests 2014. Resour. Bull. NRS-111. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 140 p.
  • Crocker, Susan J. 2017. Forests of Illinois, 2016. Resource Update FS-112. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan J.; Barnett, Charles J.; Butler, Brett J.; Hatfield, Mark A.; Kurtz, Cassandra M.; Lister, Tonya W.; Meneguzzo, Dacia M.; Miles, Patrick D.; Morin, Randall S.; Nelson, Mark D.; Piva, Ronald J.; Riemann, Rachel; Smith, James E.; Woodall, Christopher W.; Zipse, William. 2017. New Jersey Forests 2013. Resour. Bull. NRS-109. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 90 p.
  • Crocker, Susan J.; Butler, Brett J.; Kurtz, Cassandra M.; McWilliams, William H.; Miles, Patrick D.; Morin, Randall S.; Nelson, Mark D.; Riemann, Rachel I.; Smith, James E.; Westfall, James A.; Woodall, Christopher W. 2017. Illinois Forests 2015. Resour. Bull. NRS-113. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 82 p.
  • Crocker, Susan J.; Liknes, Greg C. 2017. Forests of New Jersey, 2016. Resource Update FS-135. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Miles, Patrick D.; Crocker, Susan J.; Walters, Brian F.; Kepler, Dennis. 2017. Forests of Minnesota, 2016. Resource Update FS-115. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Morin, Randall S.; Liebhold, Andrew M.; Pugh, Scott A.; Crocker, Susan J. 2017. Regional assessment of emerald ash borer, Agrilus planipennis, impacts in forests of the Eastern United States. Biological Invasions. 19: 703-711. http://dx.doi.org/10.1007/s10530-016-1296-x
  • Crocker, Susan J.; Butler, Brett J. 2016. Forests of New Jersey, 2015. Resource Update FS-98. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan J.; Liknes, Greg C.; McKee, Fraser R.; Albers, Jana S.; Aukema, Brian H. 2016. Stand-level factors associated with resurging mortality from eastern larch beetle (Dendroctonus simplex LeConte). Forest Ecology and Management. 375: 27-34.
  • Crocker, Susan; Butler, Brett. 2016. Forests of Illinois, 2015. Resource Update FS-85. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Gormanson, Dale D.; Gallion, Joey; Barnett, Charles J.; Butler, Brett J.; Crocker, Susan J.; Kurtz, Cassandra M.; Lister, Tonya W.; Luppold, William; McWilliams, William; Miles, Patrick D.; Morin, Randall S.; Nelson, Mark D.; O'Connell, Barbara; Perry, Charles H. (Hobie); Riemann, Rachel I.; Piva, Ronald J.; Smith, James E.; Sowers, Paul A.; Westfall, Jim; Woodall, Christopher W. 2016. Indiana Forests 2013. Resour. Bull. NRS-107. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 156 p.
  • McCaskill, George L.; Albright, Thomas; Barnett, Charles J.; Butler, Brett J.; Crocker, Susan J.; Kurtz, Cassandra M.; McWilliams, William H.; Miles, Patrick D.; Morin, Randall S.; Nelson, Mark D.; Widmann, Richard H.; Woodall, Christopher W. 2016. Maine Forests 2013. Resour. Bull. NRS-103. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 103 p.
  • Miles, Patrick D.; VanderSchaaf, Curtis L.; Barnett, Charles; Butler, Brett J.; Crocker, Susan J.; Gormanson, Dale D.; Kurtz, Cassandra M.; Lister, Tonya W.; McWilliams, William H.; Morin, Randall S.; Nelson, Mark D.; Perry, Charles H. (Hobie); Riemann, Rachel I.; Smith, James E.; Walters, Brian F.; Westfall, Jim; Woodall, Christopher W. 2016. Minnesota Forests 2013. Resource Bulletin NRS-104. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 134 p.
  • Morin, Randall S.; Cook, Gregory W.; Barnett, Charles J.; Butler, Brett J.; Crocker, Susan J.; Hatfield, Mark A.; Kurtz, Cassandra M.; Lister, Tonya W.; Luppold, William G.; McWilliams, William H.; Miles, Patrick D.; Nelson, Mark D.; Perry, Charles H. (Hobie); Piva, Ronald J.; Smith, James E.; Westfall, Jim; Widmann, Richard H.; Woodall, Christopher W. 2016. West Virginia Forests 2013. Resour. Bull. NRS-105. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 128 p.
  • Nelson, Mark D.; Barnett, Charles J.; Brewer, Matt; Butler, Brett J.; Crocker, Susan J.; Domke, Grant M.; Gormanson, Dale D.; Kurtz, Cassandra M.; Lister, Tonya W.; Matthews, Stephen; McWilliams, William H.; Meneguzzo, Dacia M.; Miles, Patrick D.; Morin, Randall S.; Piva, Ronald J.; Riemann, Rachel; Smith, James E.; Walters, Brian F.; Westfall, Jim; Woodall, Christopher W. 2016. Iowa Forests, 2013. Resour. Bull. NRS-102. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 124 p.
  • Piva, Ronald J.; Treiman, Thomas B.; Butler, Brett J.; Crocker, Susan J.; Gormanson, Dale D.; Griffith, Douglas M.; Kurtz, Cassandra M.; Lister, Tonya W.; Luppold, William G.; McWilliams, William H.; Miles, Patrick D.; Morin, Randall S.; Nelson, Mark D.; Perry, Charles H. (Hobie); Riemann, Rachel; Smith, James E.; Walters, Brian F.; Woodall, Christopher W. 2016. Missouri Forests 2013. Resour. Bull. NRS-108. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 116 p.
  • Butler, Brett J.; Crocker, Susan J. 2015. Forests of Massachusetts, 2014. Resource Update FS-57. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Butler, Brett J.; Crocker, Susan J. 2015. Forests of Connecticut, 2014. Resource Update FS-56. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Butler, Brett J.; Crocker, Susan J. 2015. Forests of Rhode Island, 2014. Resource Update FS-58. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Butler, Brett J.; Crocker, Susan J.; Domke, Grant M.; Kurtz, Cassandra M.; Lister, Tonya W.; Miles, Patrick D.; Morin, Randall S.; Piva, Ronald J.; Riemann, Rachel; Woodall, Christopher W. 2015. The forests of Southern New England, 2012. Resource Bulletin NRS-97. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 42 p. [DVD included].
  • Crocker, Susan J. 2015. Forests of New Jersey, 2014. Resource Update FS-61. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan J. 2015. Forests of Illinois, 2014. Resource Update FS-39. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan J.; Walters, Brian F.; Morin, Randall S. 2015. Visual analysis of forest health using story maps: a tale of two forest insect pests. In: Stanton, Sharon M.; Christensen, Glenn A., comps. 2015. Pushing boundaries: new directions in inventory techniques and applications: Forest Inventory and Analysis (FIA) symposium 2015. 2015 December 8-10; Portland, Oregon. Gen. Tech. Rep. PNW-GTR-931. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. p. 315.
  • Liknes, Greg C.; Crocker, Susan J.; Morin, Randall S.; Walters, Brian F. 2015. Hurricane impacts on forest resources in the Eastern United States: a post-sandy assessment. In: Stanton, Sharon M.; Christensen, Glenn A., comps. 2015. Pushing boundaries: new directions in inventory techniques and applications: Forest Inventory and Analysis (FIA) symposium 2015. 2015 December 8-10; Portland, Oregon. Gen. Tech. Rep. PNW-GTR-931. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 173-177.
  • Meneguzzo, D.M.; Crocker, S.J. 2015. Forests of Kansas, 2014. Resource Update FS-42. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 5 p.
  • Meneguzzo, Dacia M.; Crocker, Susan J. 2015. Forests of Nebraska, 2014. Resource Update FS-50. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 5 p.
  • Morin, Randall S.; Barnett, Chuck J.; Butler, Brett J.; Crocker, Susan J.; Domke, Grant M.; Hansen, Mark H.; Hatfield, Mark A.; Horton, Jonathan; Kurtz, Cassandra M.; Lister, Tonya W.; Miles, Patrick D.; Nelson, Mark D.; Piva, Ronald J.; Wilmot, Sandy; Widmann, Richard H.; Woodall, Christopher W.; Zaino, Robert. 2015. Forests of Vermont and New Hampshire 2012. Resour. Bull. NRS-95. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 80 p.
  • Morin, Randall S.; Pugh, Scott A.; Liebhold, Andrew M.; Crocker, Susan J. 2015. A regional assessment of emerald ash borer impacts in the Eastern United States: ash mortality and abundance trends in time and space. In: Stanton, Sharon M.; Christensen, Glenn A., comps. 2015. Pushing boundaries: new directions in inventory techniques and applications: Forest Inventory and Analysis (FIA) symposium 2015. 2015 December 8-10; Portland, Oregon. Gen. Tech. Rep. PNW-GTR-931. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 233-236.
  • Crocker, Susan J. 2014. Forests of New Jersey, 2013. Resource Update FS-28. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan J. 2014. Forests of Illinois, 2013. Resource Update FS-3. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, S.J. 2013. New Jersey's forest resources, 2012. Res. Note NRS-183. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, S.J. 2013. Illinois' forest resources, 2012. Res. Note. NRS-168. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan J.; Barnett, Charles J.; Hatfield, Mark A. 2013. Illinois' Forests, 2005: Statistics, Methods, and Quality Assurance. Resour. Bull. NRS-30. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 94 p.
  • Crocker, Susan J.; Nelson, Mark D.; Barnett, Charles J.; Butler, Brett J.; Domke, Grant M.; Hansen, Mark H.; Hatfield, Mark A.; Lister, Tonya W.; Meneguzzo, Dacia M.; Piva, Ronald J.; Wilson, Barry T.; Woodall, Christopher W. 2013. Illinois' Forests 2010. Resour. Bull. NRS-86. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 52 p.
  • Haugen, David E.; Harsel, Robert; Bergdahl, Aaron; Claeys, Tom; Woodall, Christopher W.; Wilson, Barry T.; Crocker, Susan J.; Butler, Brett J.; Kurtz, Cassandra M.; Hatfield, Mark A.; Barnett, Charles H.; Domke, Grant; Kaisershot, Dan; Moser, W. Keith; Lister, Andrew J.; Gormanson, Dale D. 2013. North Dakota's Forests 2010. Resour. Bull. NRS-76. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 52 p.
  • McCaskill, George L.; McWilliams, William H.; Alerich, Carol A.; Butler, Brett J.; Crocker, Susan J.; Domke, Grant M.; Griffith, Doug; Kurtz, Cassandra M.; Lehman, Shawn; Lister, Tonya W.; Morin, Randall S.; Moser, W. Keith; Roth, Paul; Riemann, Rachel; Westfall, James A. 2013. Pennsylvania's Forests, 2009. Resour. Bull. NRS-82. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 52 p.
  • Moser, W. Keith; Hansen, Mark H.; Atchison, Robert L.; Butler, Brett J.; Crocker, Susan J.; Domke, Grant; Kurtz, Cassandra M.; Lister, Andrew; Miles, Patrick D.; Nelson, Mark D.; Piva, Ronald J.; Woodall, Christopher W. 2013. Kansas' Forests 2010. Resour. Bull. NRS-85. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 63 p.
  • Piva, Ronald J.; Walters, Brian F.; Haugan, Douglas D.; Josten, Gregory J.; Butler, Brett J.; Crocker, Susan J.; Domke, Grant M.; Hatfield, Mark A.; Kurtz, Cassandra M.; Lister, Andrew J.; Lister, Tonya W.; Moser, W. Keith; Nelson, Mark D.; Woodall, Christopher W. 2013. South Dakota's Forests 2010. Resour. Bull. NRS-81. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 60 p.
  • Woodall, Christopher W.; Domke, Grant M.; Riley, Karin L.; Oswalt, Christopher M.; Crocker, Susan J.; Yohe, Gary W. 2013. A framework for assessing global change risks to forest carbon stocks in the United States. PLoS ONE. 8(9): e73222.
  • Crocker, S.J. 2012. Illinois' forest resources, 2011. Res. Note. NRS-145. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, S.J. 2012. New Jersey's forest resources, 2011. Res. Note NRS-156. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan J.; Meneguzzo, Dacia M. 2012. Quantifying change in riparian ash forests following the introduction of EAB in Michigan and Indiana. In: McWilliams, Will; Roesch, Francis A. eds. 2012. Monitoring Across Borders: 2010 Joint Meeting of the Forest Inventory and Analysis (FIA) Symposium and the Southern Mensurationists. e-Gen. Tech. Rep. SRS-157. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 105-107.
  • Lister, Tonya W.; Gladders, Glenn; Barnett, Charles J.; Brand, Gary J.; Butler, Brett J.; Crocker, Susan J.; Domke, Grant M.; Griffith, Douglas M.; Hatfield, Mark A.; Kurtz, Cassandra M.; Lister, Andrew J.; Morin, Randall S.; Moser, W. Keith; Nelson, Mark D.; Perry, Charles H.; Piva, Ronald J.; Riemann, Rachel; Woodall, Christopher W. 2012. Delaware's Forests 2008. Resour. Bull. NRS-62. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 56 p. [DVD included].
  • Meneguzzo, Dacia M; Crocker, Susan J.; Nelson, Mark D.; Barnett, Charles J.; Butler, Brett J.; Domke, Grant M.; Hansen, Mark H.; Hatfield, Mark A.; Liknes, Greg C.; Lister, Andrew J.; Lister, Tonya W.; Piva, Ronald J.; Wilson, Barry T. (Ty); Woodall, Christopher W. 2012. Nebraska's Forests 2010. Resour. Bull. NRS-68 . Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 47 p. [DVD included]
  • Perry, Charles H.; Everson, Vern A.; Butler, Brett J.; Crocker, Susan J.; Dahir, Sally E.; Diss-Torrance, Andrea L.; Domke, Grant M; Gormanson, Dale D.; Herrick, Sarah K.; Hubbard, Steven S.; Mace, Terry R.; Miles, Patrick D.; Nelson, Mark D.; Rodeout, Richard B.; Saunders, Luke T.; Stueve, Kirk M.; Wilson, Barry T.; Woodall, Christopher W. 2012. Wisconsin's Forests 2009. Resour. Bull. NRS-67. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 62 p. [Includes DVD].
  • Butler, Brett J.; Barnett, Charles J.; Crocker, Susan J.; Domke, Grant M.; Gormanson, Dale ; Hill, William N.; Kurtz, Cassandra M.; Lister, Tonya; Martin, Christopher; Miles, Patrick D.; Morin, Randall; Moser, W. Keith; Nelson, Mark D.; O'Connell, Barbara; Payton, Bruce; Perry, Charles H.; Piva, Ronald J.; Riemann, Rachel; Woodall, Christopher W. 2011. The Forests of Southern New England, 2007: A report on the forest resources of Connecticut, Massachusetts, and Rhode Island. Resour. Bull. NRS-55. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 48 p. [DVD included].
  • Crocker, S. J. 2011. New Jersey's forest resources, 2010. Note NRS-125. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, S.J. 2011. Illinois' forest resources, 2010. Res. Note. NRS-120. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, S.J.; Woodall, C.W. 2011. Illinois' forest resources, 2009. Res. Note NRS-94. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan. J. 2011. New Jersey's forest resources, 2009. Res. Note NRS-95. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Lister, T.W.; Perdue, J.L; Barnett, C.J.; Butler, B.J.; Crocker, S.J.; Domke, G.M.; Griffith, D.; Hatfield, M.A.; Kurtz, C.M.; Lister, A.J.; Morin, R.S.; Moser, W.K.; Nelson, M.D.; Perry, C.H.; Piva, R.J.; Riemann, R.; Widmann, R.; Woodall, C.W. 2011. Maryland's Forests 2008. Resour. Bull. NRS-58. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 60 p. [DVD included].
  • Woodall, Christopher W.; Webb, Mark N.; Wilson, Barry T.; Settle, Jeff; Piva, Ron J.; Perry, Charles H.; Meneguzzo, Dacia M.; Crocker, Susan J.; Butler, Brett J.; Hansen, Mark; Hatfield, Mark; Brand, Gary; Barnett, Charles. 2011. Indiana's Forests 2008. Resour. Bull. NRS-45. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 56 p. [CD included].
  • Crocker, S.J. 2010. Illinois' forest resources, 2008. Res. Note NRS-72. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan. J. 2010. New Jersey's forest resources, 2008. Res. Note. NRS-77. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan. J.; McWilliams, William H. 2010. New Jersey's forest resources, 2007. Res. Note NRS-67. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Kurtz, C.M.; Crocker, S.J. 2010. Forest resources of the Shawnee National Forest, 2007. Res. Note NRS-59. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Liknes, Greg C.; Crocker, Susan J.; Meneguzzo, Dacia M. 2010. Climatic controls on emerald ash borer dispersal. In: Michler, Charles H.; Ginzel, Matthew D., eds. 2010. Proceedings of symposium on ash in North America; 2010 March 9-11; West Lafayette, IN. Gen. Tech. Rep. NRS-P-72. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 61.
  • McRoberts, Ronald E.; Hatfield, Mark A.; Crocker, Susan J. 2010. Uncertainty estimation for map-based analyses. In: Pye, John M.; Rauscher, H. Michael; Sands, Yasmeen; Lee, Danny C.; Beatty, Jerome S., tech. eds. Advances in threat assessment and their application to forest and rangeland management. Gen. Tech. Rep. PNW-GTR-802. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest and Southern Research Stations: 637-646
  • Meneguzzo, Dacia M.; Crocker, Susan J.; Liknes, Greg C. 2010. A technique for mapping urban ash trees using object-based image analysis. In: Michler, Charles H.; Ginzel, Matthew D., eds. 2010. Proceedings of symposium on ash in North America; 2010 March 9-11; West Lafayette, IN. Gen. Tech. Rep. NRS-P-72. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 62.
  • Nelson, M.D.; Brewer, M.; Crocker, S.J. 2010. Iowa's forest resources, 2009. Res. Note NRS-102. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Woodall, C.W.; Webb, M.N.; Crocker, S.J. 2010. Indiana's forest resources, 2009. Res. Note NRS-76. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, S.J. 2009. Illinois' Forest Resources, 2007. Res. Note. NRS-35. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Crocker, Susan J.; Brand, Gary J.; Butler, Brett J.; Haugen, David E.; Little, Dick C.; Meneguzzo, Dacia M.; Perry, Charles H.; Piva, Ronald J.; Wilson, Barry T.; Woodall, Christopher W. 2009. Illinois' Forests 2005. Resour. Bull. NRS-29. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 114 p.
  • Crocker, Susan J.; McCullough, Deborah G.; Siegert, Nathan W. 2009. Predicting the ability to produce emerald ash borer: a comparison of riparian and upland ash forests in southern lower Michigan. In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; McWilliams, William H., eds. Proceedings of the eighth annual forest inventory and analysis symposium; 2006 October 16-19; Monterey, CA. Gen. Tech. Report WO-79. Washington, DC: U.S. Department of Agriculture, Forest Service. 99-102.
  • Crocker, Susan J.; Meneguzzo, Dacia M. 2009. An assessment of the relationship between emerald ash borer presence and landscape pattern. In: McWilliams, Will; Moisen, Gretchen; Czaplewski, Ray, comps. Forest Inventory and Analysis (FIA) Symposium 2008; October 21-23, 2008; Park City, UT. Proc. RMRS-P-56CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 9 p.
  • Haugen, David E.; Kangas, Michael; Crocker, Susan J.; Perry, Charles H.; Woodall, Christopher W.; Butler, Brett J.; Wilson, Barry T.; Kaisershot, Dan J. 2009. North Dakota's forests 2005. Resour. Bull. NRS-31. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 82 p.
  • McRoberts, Ronald E.; Hatfield, Mark A.; Crocker, Susan J. 2009. Estimating uncertainty in map intersections. In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; McWilliams, William H., eds. Proceedings of the eighth annual forest inventory and analysis symposium; 2006 October 16-19; Monterey, CA. Gen. Tech. Report WO-79. Washington, DC: U.S. Department of Agriculture, Forest Service. 289-296.
  • Moser, W. Keith; Barnard, Edward L.; Billings, Ronald F.; Crocker, Susan J.; Dix, Mary Ellen; Gray, Andrew N.; Ice, George G.; Kim, Mee-Sook; Reid, Richard; Rodman, Sue U.; McWilliams, William H. 2009. Impacts of nonnative invasive species on US forests and recommendations for policy and management. Journal of Forestry. 107(6): 320-327.
  • Piva, Ronald J.; Moser, W. Keith; Haugan, Douglas D.; Josten, Gregory J.; Brand, Gary J.; Butler, Brett J.; Crocker, Susan J.; Hansen, Mark H.; Meneguzzo, Dacia M.; Perry, Charles H.; Woodall, Christopher W. 2009. South Dakota's forests 2005. Resour. Bull. NRS-35. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 96 p.
  • Pugh, Scott A.; Hansen, Mark H.; Pedersen, Lawrence D.; Heym, Douglas C.; Butler, Brett J.; Crocker, Susan J.; Meneguzzo, Dacia; Perry, Charles H.; Haugen, David E.; Woodall, Christopher; Jepsen, Ed. 2009. Michigan's forests 2004. Resour. Bull. NRS-34. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 210 p.
  • Meneguzzo, Dacia M.; Butler, Brett J.; Crocker, Susan J.; Haugen, David E.; Moser, W. Keith; Perry, Charles H.; Wilson, Barry T.; Woodall, Christopher W. 2008. Nebraska's forests, 2005. Resour. Bull. NRS-27. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 94 p.
  • Moser, W. Keith; Hansen, Mark H.; Atchison, Robert L.; Brand, Gary J.; Butler, Brett J.; Crocker, Susan J.; Meneguzzo, Dacia M.; Nelson, Mark D.; Perry, Charles H.; Reading, William H. IV; Wilson, Barry T.; Woodall, Christopher W. 2008. Kansas forests 2005. Resour. Bull. NRS-26. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 125 p.
  • Moser, W.K.; Hansen, M.H.; Crocker, S.J.; Treiman, T.B. 2008. Missouri's Forest Resources, 2007. Res. Note. NRS-29. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
  • Perry, Charles H. (Hobie); Everson, Vern A.; Brown, Ian K.; Cummings-Carlson, Jane; Dahir, Sally E.; Jepsen, Edward A.; Kovach, Joe; Labissoniere, Michael D.; Mace, Terry R.; Padley, Eunice A.; Rideout, Richard B.; Butler, Brett J.; Crocker, Susan J.; Liknes, Greg C.; Morin, Randall S.; Nelson, Mark D.; Wilson, Barry T. (Ty); Woodall, Christopher W. 2008. Wisconsin's forests, 2004. Resour. Bull. NRS-23. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 104 p.
  • Crocker, S.J. 2007. Iowa's forest resources, 2006. Res. Note. NRS-12. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
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National Research Highlights

Gallery pattern of eastern larch beetle under the bark of an infested tamarack.  Steven Katovich, U.S. Department of Agriculture Forest Service, Bugwood.org. Licensed under a Creative Commons Attribution 3.0 License.

Forest Inventory and Analysis Data Helps Inform Landscape Drivers of Insect-induced Tamarack Mortality

Year: 2016

Tamarack trees have long been associated with Minnesota’s “Great North Woods” and have seen a slow but steady rise in abundance starting in the mid-20th century. Now, an eruption in the population of native eastern larch beetles is causing mortality of tamarack to climb.

Last modified: Friday, March 14, 2014