Document


Title

Stand-level attributes of snowshoe hare (Lepus americanus) habitat in a post-sire trembling aspen (Populus tremuloides) chronosequence in central Yukon
Document Type: Journal Article
Author(s): W. L. Strong; T. S. Jung
Publication Year: 2012

Cataloging Information

Keyword(s):
  • age classes
  • boreal forests
  • Canada
  • chronosequence
  • CWD - coarse woody debris
  • deadfall
  • fire frequency
  • fire management
  • fire size
  • forest fire
  • forest management
  • heavy fuels
  • keystone species
  • Lepus americanus
  • Lepus americanus
  • Picea albertiana
  • Picea albertiana
  • population density
  • Populus tremuloides
  • Populus tremuloides
  • post fire recovery
  • post-fire succession
  • quaking aspen
  • size classes
  • snowshoe hare
  • snowshoe hare
  • stand characteristics
  • statistical analysis
  • succession
  • trembling aspen
  • western white spruce
  • western white spruce
  • wildfires
  • wildlife habitat management
  • Yukon Territory
Region(s):
Record Maintained By:
Record Last Modified: September 27, 2018
FRAMES Record Number: 52092
Tall Timbers Record Number: 29134
TTRS Location Status: In-file
TTRS Call Number: Journals - C
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

Large-scale fires are anticipated to increase in frequency in the boreal forest under global climate warming scenarios. To understand concomitant responses by wildlife to fire-induced habitat changes, fecal pellet counts were used to assess Snowshoe Hare (Lepus americanus) use of four age-classes of boreal forest after fire in central Yukon, Canada. Use of stands across a chronosequence of 8-177 years was bimodal. Post-fire Trembling Aspen (Populus tremuloides) stands £20 years old had greater densities of Snowshoe Hare pellets (median 156 pellets/dam2) than Trembling Aspen stands 21-70 years old, mixedwood stands 71-120 years old (<17 pellets/dam2), or Western White Spruce (Picea albertiana) -dominated stands 121-170 years old (71 pellets/dam2). Forty stand-level compositional and structural variables were assessed as possible predictors of Snowshoe Hare pellet densities. Multidimensional scaling was used to identify variables (n = 10) that were most strongly related to pellet densities and was followed by multiple regression. Canopy cover of Trembling Aspen <50 cm tall and Western White Spruce £1 m tall, and deadfall depth, in combination, were the best estimators of Snowshoe Hare pellet densities among stands in the chronosequence (P <0.001, 64.5% variance explained). Although Trembling Aspen <50 cm tall explained the most variance, its canopy cover did not exceed 10%. More Trembling Aspen cover <50 cm tall and greater deadfall depths within the chronosequence were associated with stands £20 years old. Peak Snowshoe Hare use occurred in early (£20 years old) rather than mid-successional (21-120 years old) stands, contrary to use patterns reported elsewhere. The lack of tall understory shrubs likely limited the use of mid-successional stands.

Citation:
Strong, W. L., and T. S. Jung. 2012. Stand-level attributes of snowshoe hare (Lepus americanus) habitat in a post-sire trembling aspen (Populus tremuloides) chronosequence in central Yukon. Canadian Field-Naturalist, v. 126, no. 4, p. 295-305.