Recent history of fire and vegetation from laminated sediment of Greenleaf Lake, Algonquin Park, Ontario
Document Type: Journal Article
Author(s): L. C. Cwynar
Publication Year: 1978

Cataloging Information

  • Abies spp.
  • Acer
  • aluminum
  • Ambrosia
  • ash
  • Betula
  • Canada
  • charcoal
  • Danthonia spicata
  • dendrochronology
  • disturbance
  • drainage
  • ecosystem dynamics
  • erosion
  • fire frequency
  • fire management
  • fire regimes
  • forest management
  • histories
  • lakes
  • Ontario
  • pine forests
  • Pinus banksiana
  • Pinus resinosa
  • Pinus strobus
  • Plantago
  • pollen
  • Populus
  • regeneration
  • Rumex
  • runoff
  • sedimentation
  • soil erosion
  • soils
  • statistical analysis
  • topography
  • wildfires
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 38543
Tall Timbers Record Number: 13149
TTRS Location Status: In-file
TTRS Call Number: Fire File DDW
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.


Laminated sediment (presumed varved) from Greenleaf Lake was examined for evidence of forest fires. A 500-year section dating approximately 770—1270 AD. was analysed for influx of pollen, charcoal, aluminum, and vanadium using decadal samples. Intervals showing concurrent peaks in charcoal, aluminum, and vanadium influx, varve thickness, and charcoal:pollen ratio were interpreted as representing major fires within the drainage basin of Greenleaf Lake. By these criteria, six fires occurred within 500 years, or one fire approximately every 80 years. The pollen diagram indicates a stable forest composition for the past 1200 years. This, coupled with abundant charcoal fragments in all sediment samples, suggests that fire has been a frequent, natural phenomenon affecting the landscape during this period. There is a significant positive correspondence between peak charcoal influxes and peak influxes of aluminum and vanadium, indicating that increased soil erosion is responsible for their deposition.©NRC Canada

Online Link(s):
Cwynar, L. C. 1978. Recent history of fire and vegetation from laminated sediment of Greenleaf Lake, Algonquin Park, Ontario. Canadian Journal of Botany, v. 56, no. 1, p. 10-21.