Document


Title

Gradient analysis of fire regimes in montane forests of the southern Cascade Range, Thousand Lakes Wilderness, California, USA
Document Type: Journal Article
Author(s): Matthew F. Bekker; Alan H. Taylor
Publication Year: 2001

Cataloging Information

Keyword(s):
  • Abies concolor
  • Abies magnifica
  • Abies spp.
  • bibliographies
  • burning intervals
  • Cascade Range
  • coniferous forests
  • dendrochronology
  • dendroecology
  • distribution
  • disturbance
  • elevation
  • fire frequency
  • fire injuries (plants)
  • fire intensity
  • fire management
  • fire regimes
  • fire return intervals
  • fire rotation length
  • fire scar analysis
  • fire severity
  • fire size
  • fire suppression
  • forest management
  • GPS - global positioning system
  • hardwood forest
  • Jeffrey pine
  • lakes
  • landscape ecology
  • lodgepole pine
  • mesic soils
  • moisture
  • montane forests
  • mountain hemlock
  • pine forests
  • Pinus contorta
  • Pinus jeffreyi
  • Pinus lambertiana
  • Pinus spp.
  • red fir
  • season of fire
  • soil moisture
  • stand characteristics
  • sugar pine
  • Thousand Lakes Wilderness Area
  • Tsuga
  • Tsuga mertensiana
  • vegetation dynamics
  • vegetation surveys
  • white fir
  • wilderness areas
  • wilderness fire management
  • xeric soils
Region(s):
Record Maintained By:
Record Last Modified: September 20, 2018
FRAMES Record Number: 19839
Tall Timbers Record Number: 14297
TTRS Location Status: In-file
TTRS Call Number: Fire File
TTRS Abstract Status: Fair use, Okay, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy 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 the Tall Timbers Research Station and Land Conservancy.

Description

Gradient analysis of fire regimes in montane forests of the southern Cascade Range, Thousand Lakes Wilderness, California, USASpecies distribution and abundance patterns in the southern Cascades are influenced by both environmental gradients and fire regimes. Little is known about fire regimes and variation in fire regimes may not be independent of environmental gradients or vegetation patterns. In this study, we analyze variation in fire regime parameters (i.e., return interval, season, size, severity, and rotation period) with respect to forest composition, elevation, and potential soil moisture in a 2042 ha area of montane forest in the southern Cascades in the Thousand Lakes Wilderness (TLW). Fire regime parameters varied with forest composition, elevation, and potential soil moisture. Median composite and point fire return intervals were shorter (4-9 yr, 14-24 yr) in low elevation and more xeric white fir (Abies concolor)-sugar pine (Pinus lambertiana) and white fir-Jeffrey pine (P. jeffreyi) and longest (20-37 yr, 20-47 yr) in mesic high elevation lodgepole pine (Pinus contorta) and red fir (Abies magnifica)-mountain hemlock (Tsuga mertensiana) forests. Values for mid-elevation red fir-white fir forests were intermediate. The pattern for fire rotation lengths across gradients was the same as for fire return intervals. The percentage of fires that occurred during the growing season was inversely related to elevation and potential soil moisture. Mean fire sizes were larger in lodgepole pine forests (405 ha) than in other forest groups (103-151 ha). In contrast to other parameters, fire severity did not vary across environmental and compositional gradients and >50% of all forests burned at high severity with most of the remainder burning at moderate severity. Since 1905, fire regimes have become similar at all gradient positions because of a policy of suppressing fire and fire regime modification will lead to shifts in landscape scale vegetation patterns.

Online Link(s):
Citation:
Bekker, Matthew F.; Taylor, Alan H. 2001. Gradient analysis of fire regimes in montane forests of the southern Cascade Range, Thousand Lakes Wilderness, California, USA. Plant Ecology 155(1):15-28.