Dr. Joanne M. Sharpe began a long-term study of selected fern species on the Holt Research Forest in 1999. Her temperate sites are in Maine, and her tropical sites include the Luquillo Experimental Forest LTER and the Jobos Bay National Estuarine Research Reserve , both in Puerto Rico. In 1997 Genevieve Pullis and Kevin Boyle of the University of Maine Department of Resource Economics and Policy tested public perceptions of forest management activities at the Holt Research Forest. In 1990 Bill Ostrofsky of the Maine Cooperative Forestry Research Unit and Al Kimball determined that trees released by the winter 1987-88 harvest did not show increased vigor. From 1993 through 1998, Nat Wheelwright of Bowdoin College assisted with a study of the reproductive effort of 15 species of herbs and shrubs.
Results are to be announced.