Skip to Main Content
Season of prescribed burn in ponderosa pine forests in eastern Oregon: impact on pine mortality.Author(s): Walter G. Thies; Douglas J. Westlind; Mark. Loewen
Source: International Journal of Wildland Fire. Vol. 14: 223-231
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (870 KB)
DescriptionA study of the effects of season of prescribed burn on tree mortality was established in mixed-age ponderosa pine (Pinus ponderosa Dougl. ex Laws.) at the south end of the Blue Mountains near Burns, Oregon. Each of six previously thinned stands was subdivided into three experimental units and one of three treatments was randomly assigned to each: fall 1997 burn, spring 1998 burn, and no burning (control). Bums were conducted as operational prescribed burns. Trees within six 0.2-ha circular plots on each experimental unit were observed for four post-burn growing seasons to determine fire damage and to detect immediate and delayed mortality and occurrence of black stain root disease (BSRD). There were 5321 tagged ponderosa pines alive at the time of the burns. The percentage of ponderosa pine dying was higher after fall burns than after spring burns. Differences in percentages of fire-caused mortality may be because fall burns are inherently more severe than spring burns. Although present in many trees, BSRD appeared to have little impact on mortality. The lion's-tail appearance, thought to be a symptom of BSRD, was found to be an unreliable indicator of BSRD in the six test stands.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationThies, Walter G.; Westlind, Douglas J.; Loewen, Mark. 2005. Season of prescribed burn in ponderosa pine forests in eastern Oregon: impact on pine mortality. International Journal of Wildland Fire. Vol. 14: 223-231
Keywordsblack stain root disease, Blue Mountains, fire, Leptographium wageneri
- Prediction of delayed mortality of fire-damaged ponderosa pine following prescribed fires in eastern Oregon, USA.
- Impact of spring or fall repeated prescribed fire on growth of ponderosa pine in eastern Oregon, USA
- Spatial patterns of ponderosa pine regeneration in high-severity burn patches
XML: View XML