Small-mammal response to group-selection silvicultural systems in Engelmann spruce - subalpine fir forests 14 years postharvest

  • Published source details Ransome D.B., Lindgren P.M.F., Waterhouse M.J., Armleder H.M. & Sullivan T.P. (2009) Small-mammal response to group-selection silvicultural systems in Engelmann spruce - subalpine fir forests 14 years postharvest. Canadian Journal of Forest Research, 39, 1698-1708.


This study is summarised as evidence for the following.

Action Category

Fell trees in groups, leaving surrounding forest unharvested

Action Link
Terrestrial Mammal Conservation
  1. Fell trees in groups, leaving surrounding forest unharvested

    A replicated, site comparison study in 2006 in four forest sites in British Columbia, Canada (Ransome et al. 2009) found that harvesting trees in 1 ha blocks did not result in higher small mammal abundance compared to clearcutting large areas. The average number of red-backed voles Myodes gapperi caught in 1-ha cuts (19.0 individuals) was not significantly different to that caught in clearcuts (8.4 individuals). Numbers caught also did not differ significantly between felling types for dusky shrew Sorex monticolus (1-ha cuts: 34.0 individuals; clearcuts: 44.3 individuals), deer mouse Peromyscus maniculatus (1-ha cuts: 9.6 individuals; clearcuts: 11.6 individuals) or common shrew Sorex cinereus (1-ha cuts: 7.3; clearcuts: 7.0). A 1-ha area was harvested in each of four sites. These were compared with two large (>30 ha) clearcut areas. Trees were harvested in 1992–1993. Small mammals were live-trapped every three weeks in June–October 2006 (five sessions). Traps were operated for two nights and, if daytime temperatures were ≤25°C, the intervening day.

    (Summarised by: Nick Littlewood)

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