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Notes: Estimating Woody Dry Matter Loss Resulting From Defoliation

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Annual dry matter increments in stems and branches of mature aspens (Populus tremuloides) were estimated from a regression of oven-dry weight on stem diameter and from ring width measurements. Before a local outbreak of forest tent caterpillar (Malacosoma disstria), the largest trees increased annually by about 6 kg per tree, the smallest by less than 2 kg. At the middle of the outbreak all trees produced less than 1 kg annually. The method described provides rapid quantitative description of the recent history of annual dry matter production in the aerial portions of trees. Forest Sci. 18:135-138.
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Keywords: Malacosoma disstria; Populus tremuloides; biomass

Document Type: News

Affiliations: Staff of the Department of the Environment, Canadian Forestry Science, Petawawa Forest Exp. Sta., Chalk River, Ontario

Publication date: 1972-06-01

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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.
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    June 1, 2016 to Feb. 28, 2017

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