Document


Title

Effects of fire severity and season of burn on Betula glandulosa growth dynamics
Document Type: Journal Article
Author(s): William J. de Groot; Ross W. Wein
Publication Year: 2004

Cataloging Information

Keyword(s):
  • Alberta
  • Betula glandulosa
  • Betula nana
  • Betula pendula
  • Betula pubescens
  • Betula spp.
  • biomass
  • Canada
  • coniferous forests
  • depth of burn
  • fire frequency
  • fire intensity
  • fire management
  • fire regimes
  • grasslands
  • heat
  • mortality
  • over-winter carbohydrate storage
  • overstory
  • phenology
  • plant communities
  • plant growth
  • plant nutrients
  • post-fire recovery
  • precipitation
  • range management
  • regeneration
  • resprouting
  • roots
  • season of fire
  • shrublands
  • site treatments
  • size classes
  • soil moisture
  • sprouting
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 8882
Tall Timbers Record Number: 17486
TTRS Location Status: In-file
TTRS Call Number: Journals-I
TTRS Abstract Status: Okay, Fair use, 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

Betula glandulosa survives over a wide range of North American fire regimes by resprouting from the rhizome. Over-winter root carbohydrate reserves are important to sprout production and growth in the following spring. Nursery and field experiments were conducted to examine the effects of seasonal clipping and fire severity (lethal heat applied to different soil depths) on B. glandulosa sprouting and growth, and seasonal burning and clipping on over-winter root carbohydrate storage. Low fire severity increased sprout numbers, and low fire severity in spring caused a large increase in height growth and above-ground biomass production over a 2-year period. Mortality rates increased sharply with higher levels of fire severity. Over-winter total non-structural carbohydrate (TNC) concentrations in roots were significantly higher in plants burned immediately after leaf-flush than in mid-summer burned plants. None of the other seasonal burning or clipping treatments significantly influenced over-winter root TNC. Post-disturbance sprout growth reflected over-winter root TNC levels. B. glandulosa survives a wide range of fire frequencies by growing in plant communities that are most likely to burn in spring or autumn, and seldom burn in summer. This provides the greatest opportunity for maximum over-winter TNC storage. As well, high soil moisture after snowmelt ensures spring fires are almost always of low severity, which promotes increased sprout production, height growth and above-ground biomass.

Online Link(s):
Citation:
de Groot, William J.; Wein, Ross W. 2004. Effects of fire severity and season of burn on Betula glandulosa growth dynamics. International Journal of Wildland Fire 13(3):287-295.