Browse by Subject

Contact Information

Northern Research Station
11 Campus Blvd., Suite 200
Newtown Square, PA 19073
(610) 557-4017
(610) 557-4132 TTY/TDD

You are here: NRS Home / Scientists & Staff / William Leak

Scientists & Staff

William Leak

Title: Research Forester
Unit: Center for Research on Ecosystem Change
Address: Northern Research Station
271 Mast Road
Durham, NH 03824
Phone: 603-868-7655
E-mail: Contact William Leak

Jump to Publications

Education

M.F. 1956 Forest Management--NY State College of Forestry, Syracuse, NY
B.S. 1953 Forestry--NY State College of Forestry, Syracuse, NY

Civic & Professional Affiliations

Fellow, Society of American Foresters
NH Timberland Owners Association

Current Research

Large-scale, longterm timber/wildlife management studies in northern hardwoods/hemlock. Forest landtyping/succession.

Featured Publications

Leak, William B.; Yamasaki, Mariko. 2013. Regeneration of upper-elevation red oak in the White Mountains of New Hampshire. Res. Note NRS-161. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 5 p.
Leak, William B.; Yamasaki, Mariko. 2012. 80 Years of thinning research on northern hardwoods in the Bartlett Experimental Forest, New Hampshire. Res. Pap. NRS-20. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 8 p.
Hoover, Coeli M.; Leak, William B.; Keel, Brian G. 2012. Benchmark carbon stocks from old-growth forests in northern New England, USA. Forest Ecology and Management. 266: 108-114.
Leak, William B.; Yamasaki, Mariko. 2012. Historical (1899) age and structural characteristics of an old-growth northern hardwood stand in New York State. Res. Note NRS-144. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 11 p.
Leak, William B.; Yamasaki, Mariko. 2012. Tree species migration studies in the White Mountains of New Hampshire. Res. Pap. NRS-19. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 8 p.

Additional Online Publications

Leak, William B. 2011. Estimating allowable-cut by area-scheduling. Res. Note NRS-115. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
Leak, William B. 2011. Historical (1749-1899) vs. present-day sugar maple and beech diameter growth in the northeast. Res. Pap. NRS-16. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 4 p.
Leak, William B.; Yamasaki, Mariko. 2011. The Bartlett Experimental Forest, Its first 75 years. NRS-INF-12-11. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 21 p.
Leak, William B.; Yamasaki, Mariko. 2010. Seventy-year record of changes in the composition of overstory species by elevation on the Bartlett Experimental Forest. Res. Pap. NRS-13. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 12 p.
Fast, Andrew J.; Ducey, Mark J.; Gove, Jeffrey H.; Leak, William B. 2008. Dating tree mortality using log decay in the White Mountains of New Hampshire. Northern Journal of Applied Forestry. 25(3): 154-157.
Sendak, Paul E.; Leak, William B. 2008. Early crop-tree release and species cleaning in young northern hardwoods: a financial analysis. Res. Pap. NRS-6. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 13 p.
Leak, William B.; Gove, Jeffrey H. 2008. Growth of northern hardwoods in New England: a 25-year update. Northern Journal of Applied Forestry. 25(2): 103-105.
DeGraaf, Richard M.; Lester, Anna M.; Yamasaki, Mariko; Leak, William B. 2007. Visual simulations of forest wildlife habitat structure, change, and landscape context in New England. Northern Journal of Applied Forestry. 24(3): 218-226.
Leak, William B. 2006. Fifty-year impacts of the beech bark disease in the Bartlett Experimental Forest, New Hampshire. Nourthern Journal of Applied Forestry 23(2):141-143
Sendak, Paul E.; Frank, Robert M.; Leak, William B. 2006. Long-term data from silvicultural studies: interpreting and assessing old records for economic insights. In: Irland, Lloyd C.; Camp, Ann E.; Brissette, John C.; and Donohew, Zachary R., eds. Long-term Silvicultural & Ecological Studies: Results for Science and Management. New Haven, CT: Yale University: 203-207
Yamasaki, Mariko; Leak, William B. 2006. Snag longevity in managed northern hardwoods. Northern Journal of Applied Forestry 23(3):215-217
Leak, William B. 2005. Effects of Small Patch Cutting on Sugar Maple Regeneration in New Hampshire Northern Hardwoods. Northern Journal of Applied Forestry. 22(1): 68-70.
Innes, J. C.; Ducey, M. J.; Gove, J. H.; Leak, W. B.; Barrett, J. P. 2005. Size-density metrics, leaf area, and productivity in eastern white pine. Canadian Journal of Forest Research 35:2469-2478
Desmarais, Kenneth M.; Leak, William B. 2005. Ten-Year Performance of Eastern White Pine - under a Crop Tree Release Regime on an Outwash Site. Northern Journal of Applied Forestry. 22(2): 139-142.
Leak, William B. 2004. Diameter Growth in Even- and Uneven-Aged Northern Hardwoods in New Hampshire Under Partial Cutting. Northern Journal of Applied Forestry. 21(3): 160-163.
Leak, William B. 2003. Best density and structure for uneven-aged northern hardwood management in New England. Northern Journal of Applied Forestry. 20(1): 43-44.
Leak, William B. 2003. Regeneration of Patch Harvests in Even-Aged Northern Hardwoods in New England. Northern Journal of Applied Forestry. 20(4): 188-189.
Leak, William B.; Sendak, Paul E. 2002. Changes in species, grade, and structure over 48 years in a managed New England northern hardwood stand. Northern Journal of Applied Forestry. 19(1): 25-27.
Solomon, Dale S.; Leak, William B. 2002. Modeling the regeneration of northern hardwoods with FOREGEN. Res. Pap. NE-719. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 9 p.
Leak, William B. 2002. Origin of sigmoid diameter distributions. Res. Pap. NE-718. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 10 p.
Zhang, Lianjun; Gove, Jeffrey H.; Liu, Chuangmin; Leak, William B. 2001. A finite mixture of two Weibull distributions for modeling the diameter distributions of rotated-sigmoid, uneven-aged stands. Canadian Journal of Forest Research. 31: 1654-1659.
Solomon, Dale S.; Leak, William B. 2000. Growth and stocking of eastern hemlock (Tsuga canadensis) in New England. In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: Symposium on sustainable management of hemlock ecosystems in eastern North America. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 43-49.
Costello, Christine A.; Yamasaki, Mariko; Pekins, Peter J.; Leak, William B.; Neefus, Christopher D. 2000. Songbird response to group selection harvests and clearcuts in a New Hampshire northern hardwood forest. Forest Ecology and Management. 127: 41-54.
Leak, William B.; Yamasaki, Mariko; Kittredge, David B., Jr.; Lamson, Neil I.; Smith, Marie-Louise. 1997. Applied ecosystem management on nonindustrial forest land. . Gen. Tech. Rep. NE-239. Radnor, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 30 p.
Nowak, Chris; Stout, Susan; Stout, Susan; Brissette, John; Brissette, John; Kenefic, Laura; Kenefic, Laura; Miller, Gary; Miller, Gary; Leak, Bill; Leak, Bill; Yaussy, Dan; Schuler, Tom; Gottschalk, Kurt; Gottschalk, Kurt. 1997. Defining the role of silvicultural research in the Northeastern Forest Experiment Station. In: Communicating the role of silviculture in managing the national forests: Proceedings of the National Silviculture Workshop. 1997 May 19-22; Warren, PA.: Gen. Tech. Rep. NE-238. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 115-122.
Solomon, Dale S.; Leak, William B. 1996. Evaluation of methodology for detecting/predicting migration of forest species. In: Hom, John; Birdsey, Richard; O'Brian, Kelly, eds. Proceedings 1995 meeting of the northern global change program; Gen. Tech. Rep. NE-214. Radnor, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: 175-182.
Leak, William B.; Cullen, J.B.; Frieswyk, Thomas S. 1995. Dynamics of whlte pine in New England. Res. Pap. NE-699. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 8 p.
Solomon, Dale S.; Herman, David A.; Leak, William B. 1995. FIBER 3.0: An Ecological Growth Model for Northeastern Forest Types. Gen. Tech. Rep. NE-204. Radnor, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 24 p.
Solomon, Dale S.; Leak, William B. 1994. Migration of tree species in New England based on elevational and regional analyses. Res. Pap. NE-688. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 9 p.
Leak, William B.; Graber, Raymond E. 1993. Six-year beechnut production in New Hampshire. Res. Pap. NE-677. Radnor, PA: US. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 6 p.
Hornbeck, J.W.; Leak, W.B. 1992. Ecology and management of northern hardwood forests in New England. Gen. Tech. Rep. NE-159. Radnor, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment 44 p.
DeGraaf, Richard M.; Yamasaki, Mariko; Leak, William B.; Lanier, John W. 1992. New England wildlife: management forested habitats. Gen. Tech. Rep. NE-144. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 271 p.
Graber, Raymond E.; Leak, William B. 1992. Seed fall in an oldgrowth northern hardwood forest. Res. Pap. NE-663. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 11 p.
Leak, W.B. 1987. Characteristics of Five Climax Stands in New Hampshire. Res. Note NE-336. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5 p.
Leak, William B.; Solomon, Dale S.; DeBald, Paul S. 1987. Silvicultural guide for northern hardwood types in the Northeast (revised). Res. Pap. NE-603. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 36 p.
Solomon, Dale S.; Leak, William B. 1986. Simulated yields for managed northern hardwood stands. Res. Pap. NE-578. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 24 p.
Leak, William B. 1985. Relationships of tree age to diameter in old-growth northern hardwoods and spruce-fir. Res. Note NE-329. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4 p.
Leak, W. B.; Tubbs, C. H. 1983. Percent crown cover tables for applying the shelterwood system in New England. Research Note NE-313. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.
Leak, William B. 1983. Stocking, growth, and habitat relations in New Hampshire hardwoods. Res. Pap. NE-523. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiement Station. 11p.
Leak, William B. 1982. Habitat mapping and interpretation in New England. Res. Pap. NE-496. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 28p.
Leak, William B. 1980. Rapid economic analysis of northern hardwood stand improvement options. Research Note NE-296. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 6 p.
Leak, William B. 1979. Effects of habitat on stand productivity in the White Mountains of New Hampshire. Res. Pap. NE-452. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 8p.
Leak, William B.; Riddle, Jane R. 1979. Why trees grow where they do in New Hampshire Forests. NE-INF-37-79. Broomall, Pennsylvania: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 26p.
Lancaster, Kenneth F.; Leak, William B. 1978. A silvicultural guide for white pine in the northeast. Gen. Tech. Rep. NE-41. Broomall, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 13 p.
Leak, W. B. 1978. Relationship of Species and Site Index to Habitat in the White Mountains of New Hampshire. Res. Pap. NE-397. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 9p.
Leak, William B. 1978. Relationships of forest vegetation to habitat on two types of glacial drift in New Hampshire. Research Note NE-257. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5 p.
Leak, W. B. 1976. Relation of Tolerant Species to Habitat in the White Mountains of New Hampshire. Res. Pap. NE-351. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 10p.
Leak, W. B.; Solomon, Dale S. 1975. Influence of residual stand density on regeneration of northern hardwoods. Res. Pap. NE-310. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 7p.
Leak, William B.; Martin, C. Wayne. 1975. Relationship of stand age to streamwater nitrate in New Hampshire. Research Note NE-211. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.
Leak, William B.; Filip, Stanley M. 1975. Uneven-aged management of northern hardwoods in New England. Res. Pap. NE-332. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 15p.
Leak, William B.; Graber, Raymond E. 1974. Forest vegetation related to elevation in the White Mountains of New Hampshire. Res. Pap. NE-299. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 7p.
Leak, William B. 1974. Some effects of forest preservation. Research Note NE-186. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.
Philbrook, James S.; Barrett, James P.; Leak, William B. 1973. A stocking guide for eastern white pine. Research Note NE-168. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 3p.
Leak, W. B. 1973. Species and structure of a virgin northern hardwood stand in New Hampshire. Research Note NE-181. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.
Leak, William B.; Filip, Stanley M. 1970. Cutting strategies and timber yields for unbalanced even-aged northern hardwood forests. Res. Pap. NE-153. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 19 p.
Leak, William B. 1970. Some preliminary estimates of energy utilization in even-aged northern hardwoods. Research Note NE-108. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 7p.
Leak, William B.; Allen, Peter H.; Barrett, James P.; Beyer, Frank K.; Mader, Donald L.; Mawson, Joseph C.; Wilson, Robert K. 1970. Yields of eastern white pine in New England related to age, site and stocking. Res. Pap. NE-176. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 15 p.
Leak, William B.; Solomon, Dale S.; Filip, Stanley M. 1969. A silvicultural guide for northern hardwoods in the northeast. Res. Pap. NE-143. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 34 p.
Leak, William B. 1968. Birch regeneration: a stochastic model. Research Note NE-85. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 7p.
Leak, William B.; Filip, Stanley M.; Solomon, Dale S. 1968. Rates of value increase for yellow birch in New England. Res. Pap. NE-120. Upper Darby, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 11 p.
Leak, William B. 1964. Estimating maximum allowable timber yields by linear programming. Res. Pap. NE-17. Upper Darby, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 9 p.
Leak, William B. 1963. Effects of Seedbed, Overstory, and Understory on White Ash regeneration. Res. Pap. NE-2. Upper Darby, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 13 p.
Filip, Stanley M.; Leak, William B. 1962. Profitable woodlot management in New England. Station Paper NE-170. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 17 p.
Leak, William B. 1961. Development of second-growth northern hardwoods on Bartlett Experimental Forest - a 25-year record. Station Paper NE-155. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-8
Filip, Stanley M.; Marquis, David A.; Leak, William B. 1960. Development of old-growth northern hardwoods on Bartlett Experimental Forest - a 22-year record. Station Paper NE-135. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 7 p.
Leak, William B.; Wilson, Robert W., Jr. 1958. Regeneration after cutting of old-growth northern hardwoods in New Hampshire. Station Paper NE-103. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-8
Leak, William B. 1958. Silvical characteristics of sweet birch (Betula lenta). Station Paper NE-113. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 14 p.

Last Modified: 02/15/2012