The impact of aging on laboratory fire behaviour in masticated shrub fuelbeds of California and Oregon, USA

Jesse Kreye, J. Morgan Varner, Jeffrey M. Kane, Eric E. Knapp, Warren P. Reed

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Mastication of shrubs and small trees to reduce fire hazard has become a widespread management practice, yet many aspects of the fire behaviour of these unique woody fuelbeds remain poorly understood. To examine the effects of fuelbed aging on fire behaviour, we conducted laboratory burns with masticated Arctostaphylos spp. and Ceanothus spp. woody debris that ranged from 2 to 16 years since treatment. Masticated fuels that were 10 years or older burned with 18 to 29% shorter flame heights and 19% lower fireline intensities compared with the younger fuelbeds across three different fuel loads (25, 50 and 75Mg ha-1). Older fuelbeds smouldered for almost 50% longer than the younger masticated fuelbeds. Fuel consumption was 96% in the two higher fuel load categories regardless of fuelbed age, whereas consumption was 77% in the lighter fuel load. Fire intensity in masticated fuels may decrease over time owing to particle degradation, but in dry environments where decomposition is slow, combustion of the remaining fuels may still pose risks for tree mortality and smoke production associated with protracted smouldering.

Original languageEnglish (US)
Pages (from-to)1002-1008
Number of pages7
JournalInternational Journal of Wildland Fire
Volume25
Issue number9
DOIs
StatePublished - Jan 1 2016

Fingerprint

fuels (fire ecology)
fire behavior
shrub
shrubs
Arctostaphylos
Ceanothus
fire hazard
fire intensity
woody debris
degradation
energy use and consumption
tree mortality
dry environmental conditions
fuel consumption
smoke
mastication
combustion
laboratory
management practice
hazard

All Science Journal Classification (ASJC) codes

  • Forestry
  • Ecology

Cite this

Kreye, Jesse ; Varner, J. Morgan ; Kane, Jeffrey M. ; Knapp, Eric E. ; Reed, Warren P. / The impact of aging on laboratory fire behaviour in masticated shrub fuelbeds of California and Oregon, USA. In: International Journal of Wildland Fire. 2016 ; Vol. 25, No. 9. pp. 1002-1008.
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The impact of aging on laboratory fire behaviour in masticated shrub fuelbeds of California and Oregon, USA. / Kreye, Jesse; Varner, J. Morgan; Kane, Jeffrey M.; Knapp, Eric E.; Reed, Warren P.

In: International Journal of Wildland Fire, Vol. 25, No. 9, 01.01.2016, p. 1002-1008.

Research output: Contribution to journalArticle

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