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The Columbian Timber Beetle, Corthylus Columbianus. VII. The Effect of Climatic Integrants on Historic Density Fluctuations

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Multiple regression analyses were used to relate population fluctuations of Corthylus columbianus Hopkins in basal sections of red and silver maple (Acer rubrum L., A. saccharinum L.) with summer and winter temperature, precipitation, and number of days flooded. Based on a sampling of 3500 beetle attacks in southern Indiana, precipitation accounted for most of the variation (61 percent), followed by flooding (19 percent) and temperature (12 percent). The best model, incorporating all three variables, accounted for 95 percent of the variation in beetle density through time. The addition of a variable for tree growth did not add strength to the model. Investigations into other geographic areas of Indiana demonstrated a similar relationship. The analyses emphasize the additive effect of previous climatic conditions on beetle population changes and give added emphasis to the climatic release hypothesis.

Document Type: Journal Article

Affiliations: Professor, Dept. of Entomology, Purdue University, Lafayette, Indiana.

Publication date: 1968-09-01

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  • 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.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
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