The Life Table Approach to Analysis of Insect Impact
Abstract:To optimize present and future forest productivity, use, and value, the destructive as well as the constructive elements operating on a forest system must be regulated. Long-term quantitative data are needed for analyzing the relative importance of these interacting forces, and the life table provides a logical format for this purpose. Two types of life table are described, and the way each can be developed to account for insect impacts on forest stands is given. A typical life table of a white-pine stand, including damage and loss caused by the white-pine weevil, is presented and discussed. Several analytical procedures may be used to reveal, in turn, the critical age intervals and the factors or agents most important in determining yield and value. Life-table data of forest stands also can augment analytical schemes of forest regulation now in use.
Document Type: Journal Article
Affiliations: Chief, Forest Insect Research Branch, Forest Service, U.S. Dept. Agric., Washington, D. C.
Publication date: 1969-05-01
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- The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.
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