The Effect of Gypsy Moth Defoliation on Cavity-Nesting Bird Communities
Abstract:Gypsy moths (Lymantria dispar) kill trees and create snags, a resource vital to cavitynesting birds. With this in mind, population trends of 11 cavity-nesting birds and their relationship to snags in an area that was defoliated by gypsy moths were investigated from 1984 to 1999. Vegetation and bird point-count data from before a major gypsy moth outbreak (1984–1986), during (1987–1988), and after (1989–1999) enabled us to ake inferences about this forest bird community. The combined abundance of the 11 cavity-nesting species examined increased during the years immediately after the outbreak (1989–1993) followed by a decline in the last 6 yr (1994–1999). The abundance of snags also increased from 1989 to 1993 followed by a decline from 1994 to 1999. Regression analysis confirmed that cavity-nesting bird populations were highly associated with snag abundance. These data suggest the importance of snags to cavity-nesting birds and that cavity-nesters were able to take immediate advantage of a new population of snags. FOR. SCI. 48(2):273–281.
Keywords: Snags; defoliation; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; natural resource management; natural resources; pesticide; woodpeckers
Document Type: Miscellaneous
Affiliations: 1: Fernbank Science Center, 156 Heaton Park Drive, Atlanta, GA, 30307, Phone: (404) 929-6308; Fax: (404) 370-1336 firstname.lastname@example.org 2: Professor West Virginia University, Division of Forestry, PO Box 6125 Morgantown, WV, 26506-6125, Phone: (304) 293-2941 ext. 2491 email@example.com
Publication date: 2002-05-01
- Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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