The third 5-year annualized inventory of Maine's forests was completed in 2013 after more than 3170 forested plots were measured. Maine contains more than 17.6 million acres of forest land, an area that has been quite stable since 1960, covering more than 82 percent of the total land area. The number of live trees greater than 1 inch in diameter are approaching 24.5 billion trees. Aboveground biomass of all live trees has increased slightly since 2008. Over the same period, the average annual volume for tree growth has increased 30 percent and tree mortality has decreased 15 percent. Tree harvest levels have remained flat since 2008.This report also includes detailed information on forest inventory methods and the quality of the estimates found in five tables (Tables A-E). A complete set of data tables and other resources can be found at http://dx.doi.org/10.2737/NRS-RB-103.
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.