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Publication Information

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Title: Canopy damage to conifer plantations within a large mixed-severity wildfire varies with stand age

Author: Thompson, Jonathan R.; Spies, Thomas A.; Olsen, Keith A.;

Date: 2011

Source: Forest Ecology and Management

Publication Series: Scientific Journal (JRNL)

Description: The 2002 Biscuit Fire burned at mixed-severities encompassing over 200,000 ha of publicly owned forestland, including more than 8300 ha of conifer plantations. We used pre- and post-fire digital aerial photography to examine how the level of canopy damage varied within these plantations in relation to topography, weather, vegetation-cover, and management history, with an emphasis on the age of the plantation. We examined 198 plantations that varied widely in age (5–47 years), size (1.25–47 ha), and landscape context. The average level of canopy damage within the plantations was 77%. Based on Random Forest variable importance values, plantation age was the best predictor of canopy damage. Average annual precipitation, elevation and topographic position were ranked second, third, and fourth, respectively. A model selection procedure, using geo-statistical regression models and Akaike’s information criterion, corroborated the importance of plantation age relative to the other predictors tested and also suggested that the influence of age varied over time. The top ranked regression model indicated that the level of canopy damage reached its maximum around age 15 and stayed relatively high until age 25 before declining.

Keywords: Biscuit Fire, Burn severity, Land use legacy, Klamath Mountains, Random Forest analysis, Geostatistical regression

Publication Notes:

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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Thompson, Jonathan R.; Spies, Thomas A.; Olsen, Keith A. 2011. Canopy damage to conifer plantations within a large mixed-severity wildfire varies with stand age. Forest Ecology and Management. 262(3): 355-360.

 


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