Document


Title

Holocene vegetation history at the boreal-forest - shrub-tundra transition in north-western Quebec
Document Type: Journal Article
Author(s): K. Gajewski; S. Payette; J. C. Ritchie
Publication Year: 1993

Cataloging Information

Keyword(s):
  • age classes
  • Alnus
  • Alnus crispa
  • Betula papyrifera
  • biogeography
  • boreal forests
  • Canada
  • carbon
  • charcoal
  • deforestation
  • dendrochronology
  • erosion
  • fire frequency
  • forest management
  • fossils
  • glaciers
  • histories
  • lakes
  • Larix laricina
  • Lycopodium
  • paleoecology
  • Picea
  • Picea mariana
  • Pinus banksiana
  • plant growth
  • pollen
  • population density
  • Populus tremuloides
  • post fire recovery
  • Quebec
  • regeneration
  • Salix
  • shrublands
  • shrubs
  • sphagnum
  • succession
  • topography
  • tundra
  • wildfires
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 34805
Tall Timbers Record Number: 9079
TTRS Location Status: In-file
TTRS Call Number: Journals-J
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

1. Pollen analysis of sediment cores from the four zones that comprise the forest-tundra transition in northern Quebec provide a history of the vegetation that can be compared with extensive macrofossil data from the region. Basal radiocarbon dates indicate that the entire reion was deglaciated around 6000 BP. 2. Pollen diagrams from three sites in the boreal forest and the forest-tundra are broadly similar and show a brief period, following deglaciation, with important non-arboreal pollen values. This was followed by a period dominated by Alnus crispa, which ended sychronously at all sites around 4000 BP. From then on Picea pollen dominated the pollen spectra. 3. During the past 3000 years there has been a progressive deforestation at the two sites in the forest tundra, but not at the site in the boreal forest. 4. A pollen diagram from a fourth site in the present-day shrub tundra shows few changes, and suggests that the forest was never further north than it is today. © Blackwell Science Ltd. Abstract reproduced by permission.

Online Link(s):
Citation:
Gajewski, K., S. Payette, and J. C. Ritchie. 1993. Holocene vegetation history at the boreal-forest - shrub-tundra transition in north-western Quebec. Journal of Ecology, v. 81, no. 3, p. 433-443.