Type of Document	Dissertation
Author	Kasbohm, John W.
URN	etd-10022007-145359
Title	Response of black bears to gypsy moth infestation in Shenandoah National Park, Virginia
Degree	PhD
Department	Fisheries and Wildlife Sciences
Advisory Committee	Advisor Name Title Vaughan, Michael R. Committee Chair Kirkpatrick, Roy L. Committee Member Scanlon, Patrick F. Committee Member Stauffer, Dean F. Committee Member Voshell, J. Reese Jr. Committee Member
Keywords	Gypsy moth
Date of Defense	1994-03-05
Availability	restricted
Abstract The effects of gypsy moth infestation on the Shenandoah National Park (SNP) black bear population and habitat were studied during 1985 - 1991 by comparing radio telemetry, population, and behavioral data from preinfestation years (1982 - 1986) and years with extensive defoliation (1987 - 1991). Gypsy moth defoliation (> 60% canopy loss) increased from 546 ha in 1986 (1 % of the study area), to 2,304 ha in 1987 (4%), 6,227 ha in 1988 (12%), and 17,736 ha in 1989 (34%). Chestnut oak and red oak habitat types received the greatest defoliation; 60% and 45% of these habitat types suffered greater than 60 % canopy loss in the North and Central Districts, respectively. Infestation resulted in a 99% reduction in acorn production in defoliated stands. Maximum daily temperatures 0.5 m above the ground in defoliated stands averaged 4.7 ± 0.3 C, 4.3 ± 0.4 C, and 2.5 ± 0.3 C warmer (P < 0.01) than in nondefoliated stands during peak defoliation, refoliation, and post-refoliation periods, respectively. Bear
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