Serotiny and life history of Pinus contorta var. latifolia
Document Type: Journal Article
Author(s): P. S. Muir; J. E. Lotan
Publication Year: 1985

Cataloging Information

  • age classes
  • Canada
  • cones
  • crowns
  • disturbance
  • fire adaptations (plants)
  • forest management
  • histories
  • Montana
  • mortality
  • pine forests
  • Pinus contorta
  • Pinus rigida
  • plant growth
  • predation
  • regeneration
  • reproduction
  • sampling
  • seeds
  • Selway-Bitterroot Wilderness Areas
  • serotiny
  • trees
  • wildfires
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 38464
Tall Timbers Record Number: 13067
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.


Mature serotinous and nonserotinous trees of Pinus Contorta Dougl. var. latifolia Engelm. in the Bitterroot Watershed of western Montana do not differ in most life-history characteristics (reproductive or vegetative). No differences between trees of the two cone types were found in height, basal area, basal area growth rates over the lives of the trees, or crown ratio. Cone number, weights of individual cones and seeds, and estimates of reproductive effort were similar in serotinous and nonserotinous trees. Reproductive characteristics were either independent of tree age. or related similarly in trees of the two cone types. Nonserotinous trees may, however, have more seeds per cone than serotinous trees. This difference in seed numbers may be adaptive if serotinous trees invest relatively heavily in cone materials to protect seeds (which arc retained in cones for many years). while nonscrotinous trees (which shed seeds each year) invest relatively heavily in seeds. Trees of the two cone types differ mainly in the particular types of disturbance favoring their regeneration, hut they often grow in the same stands where there are similar selective pressures on most aspects of their biology. Gene flow between them probably homogenizes all but those differences maintained by strong selective pressures.©NRC Canada

Online Link(s):
Muir, P. S., and J. E. Lotan. 1985. Serotiny and life history of Pinus contorta var. latifolia. Canadian Journal of Botany, v. 63, p. 938-945.