Document


Title

Forest history of the last 12 000 years based on plant macrofossil analysis of sediment from Marion Lake, southwestern British Columbia
Document Type: Journal Article
Author(s): N. Wainman; R. W. Mathewes
Publication Year: 1987

Cataloging Information

Keyword(s):
  • Abies amabilis
  • British Columbia
  • Canada
  • charcoal
  • coniferous forests
  • conifers
  • ecotones
  • erosion
  • fossils
  • histories
  • lakes
  • mountains
  • needles
  • paleoecology
  • peat
  • Pinus contorta
  • Pinus monticola
  • pollen
  • precipitation
  • runoff
  • sedimentation
  • statistical analysis
  • streams
  • Taxus
  • Taxus brevifolia
  • Thuja
  • Thuja plicata
  • Tsuga heterophylla
  • watershed management
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 38642
Tall Timbers Record Number: 13252
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.

Description

The forest history around Marion Lake in southwestern British Columbia is reconstructed using plant macrofossil analysis. A comparison with a previous reconstruction based on pollen and spore analysis reveals a good correspondence between pollen and macrofossil zones. Significant improvements in the reconstruction of forest history are possible by combining the study of pollen and macrofossils. Thuja plicata macrofossils do not appear at Marion Lake until 6000 BP. contradicting previous suggestions of red cedar presence as early as 10 000 BP. Although not common at present, Taxus brevifolia may have been an important component of the forest prior to the arrival of Thuja. Fluvial input of macrofossils is important at Marion Lake. Charcoal also appears to enter the lake primarily during periods of high runoff and erosion in the watershed, suggesting the need for caution in the interpretation of charcoal data from stream-fed lakes. Increases in total influx coincide with evidence for increased precipitation after 7000 BP. Marked reductions in macrofossil influx coincide with periods of peat deposition upstream from the present lake. Relative percentages of conifer needles are unaffected by changes in influx.©NRC Canada

Online Link(s):
Citation:
Wainman, N., and R. W. Mathewes. 1987. Forest history of the last 12 000 years based on plant macrofossil analysis of sediment from Marion Lake, southwestern British Columbia. Canadian Journal of Botany, v. 65, p. 2179-2187.