Document


Title

Postfire vegetation recovery and tree establishment at the Arctic tree-line: climatic-change-vegetation-response hypotheses
Document Type: Journal Article
Author(s): Simon M. Landhausser; Ross W. Wein
Publication Year: 1993

Cataloging Information

Keyword(s):
  • adaptation
  • age classes
  • arctic
  • Betula
  • Betula papyrifera
  • biogeography
  • biomass
  • Canada
  • climate change
  • coniferous forests
  • cover
  • deciduous forests
  • disturbance
  • droughts
  • ecotones
  • fire frequency
  • fire intensity
  • fire management
  • forbs
  • forest fragmentation
  • ground cover
  • invasive species
  • lichens
  • mineral soils
  • mosses
  • Northwest Territories
  • organic soils
  • Picea
  • Picea glauca
  • Picea mariana
  • plant communities
  • plant growth
  • population density
  • Populus
  • Populus balsamifera
  • post fire recovery
  • regeneration
  • rivers
  • seed dispersal
  • seedlings
  • shrubs
  • soil nutrients
  • soil temperature
  • species diversity (plants)
  • succession
  • tundra
  • wildfires
Record Maintained By:
Record Last Modified: March 13, 2019
FRAMES Record Number: 34801
Tall Timbers Record Number: 9075
TTRS Location Status: In-file
TTRS Call Number: Journals-J
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

1. A fire of unusually great severity (deep burning) burned across the forest-tundra near Inuvik, Northwest Territories from August 8 to 18, 1968. 2. Burned-unburned paired study sites around the fire perimeter, which had been established in both tundra and forest-tundra in 1973 were relocated in 1990. These showed that total vascular plant cover had reached prefire levels after 22 years, that tall shrubs had become dominant in the tundra and that biomass was now sufficient to support another fire. Cryptogams showed minimum recovery between the two studies. 3. In previously treed areas postfire densities of Picea mariana and Picea glauca were much lower than before. Betula papyrifera and Populus balsamifera, however, showed an increase in density and had extended their range into previously treeless areas. 4. The results obtained have implications for vegetation changes in the Circumpolar North related to global warming. It is predicted that deciduous tree species with long distance seed dispersal mechanisms will increase in abundance and will invade the tundra in a stepwise fshion after each fire. This will be most noticeable near northward flowing rivers because these valleys provide the habitat for outlier tree populations and are therefore a major source of propagules. © Blackwell Science Ltd. Abstract reproduced by permission.

Online Link(s):
Citation:
Landhausser, S. M., and R. W. Wein. 1993. Postfire vegetation recovery and tree establishment at the Arctic tree-line: climatic-change-vegetation-response hypotheses. Journal of Ecology, v. 81, no. 4, p. 665-672.