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Type: Journal Article
Author(s): Alicia L. Reiner; Nicole M. Vaillant; Josephine A. Fites-Kaufman; Scott N. Dailey
Publication Date: 2009

Due to increases in tree density and hazardous fuel loading in Sierra Nevadan forests, land management is focusing on fuel reduction treatments to moderate the risk of catastrophic fires. Fuel treatments involving mechanical and prescribed fire methods can reduce surface as well as canopy fuel loads. Mastication is a mechanical method which shreds smaller trees and brush onto the surface fuel layer. Little data exist quantifying masticated fuel beds. Despite the paucity of data on masticated fuels, land managers desire fuel loading, potential fire behavior and fire effects such as tree mortality information for masticated areas. In this study we measured fuel characteristics before and after mastication and mastication plus prescribed burn treatments in a 25-year old ponderosa pine (Pinus ponderosa C. Lawson) plantation. In addition to surface fuel characteristics and tree data collection, bulk density samples were gathered for masticated material. Regressions were created predicting masticated fuel loading from masticated fuel bed depth. Total masticated fuel load prior to fire treatment ranged from 25.9 to 42.9 Mg ha-1, and the bulk density of masticated fuel was 125 kg m-3. Mastication treatment alone showed increases in most surface fuel loadings and decreases in canopy fuel loads. Masticated treatment in conjunction with prescribed burning reduced both surface and canopy fuel loads. Detailed information on fuel structure in masticated areas will allow for better predictions of fire behavior and fire effects for fire in masticated fuel types. Understanding potential fire behavior and fire effects associated with masticated fuels will allow managers to make decisions on the possibility of mastication to create fuel breaks or enhance forest health.

Online Links
Citation: Reiner, Alicia L.; Vaillant, Nicole M.; Fites-Kaufman, JoAnn; Dailey, Scott N. 2009. Mastication and prescribed fire impacts on fuels in a 25-year old ponderosa pine plantation, southern Sierra Nevada. Forest Ecology and Management 258(11):2365-2372.

Cataloging Information

  • Abies concolor
  • age classes
  • Arctostaphylos patula
  • brush
  • Calocedrus decurrens
  • catastrophic fires
  • Cercocarpus montanus
  • coniferous forests
  • duff
  • fire hazard reduction
  • fire management
  • fuel breaks
  • fuel loading
  • fuel management
  • fuel reduction treatments
  • fuel treatment
  • fuel types
  • Healthy Forests Restoration Act
  • land management
  • litter
  • mastication
  • mortality
  • Nevada
  • NFP - National Fire Plan
  • overstory
  • pine
  • pine plantations
  • Pinus
  • Pinus lambertiana
  • Pinus ponderosa
  • Pinus ponderosa
  • ponderosa pine
  • population density
  • post-fire recovery
  • Quercus chrysolepis
  • Quercus kelloggii
  • Ribes roezlii
  • site treatments
  • southern Sierra Nevada
  • surface fuels
  • trees
  • understory vegetation
  • woody fuels
Tall Timbers Record Number: 24322Location Status: In-fileCall Number: Fire FileAbstract Status: Fair use, Okay, Reproduced by permission
Record Last Modified:
Record Maintained By: FRAMES Staff (
FRAMES Record Number: 9184

This bibliographic record was either created or modified by Tall Timbers and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of Tall Timbers.