Itcha-Ilgachuz alternative silvicultural systems trial

Trial name: Silvicultural systems to maintain northern caribou habitat in lodgepole pine forests in the MSxv and SBPSxc subzones in the Cariboo Region (EP1208) (aka Itcha-Ilgachuz alternative silvicultural systems trial)
Trial objectives Installation name Ecosystems represented Tree species Silvicultural systems tested Post establishment treatments
To test the impact of partial cutting and MPB on:
  • Lichen (caribou forage)
  • vegetation
  • birds
  • commercial mushrooms
  • regeneration (natural and planted)
  • microclimate
  • stand stability
  • long-term site productivity
Itcha-Ilgachuz Alternative Silvicultural Systems trial
  • SBPSxc
  • MSxv
  • Lodgepole pine
  • Hybrid spruce
  • Clearcut
  • Irregular group shelterwood – stem-only harvesting (50% area retention)
  • Irregular group shelterwood – whole tree harvesting (50% area retention)
  • Group selection (70% area retention)
  • No-harvest controls
  • Uncut mountain pine beetle monitoring blocks

In 3 phases:

  • Pilot block
  • Replicated trial
  • Adaptive management trial
Comments: This trial has become more complex with the Mountain Pine Beetle killing 60% of the overstorey trees by 2008. One of the blocks in the replicated harvesting experiment and 3 blocks in the mountain pine beetle monitoring blocks burned in the 2017 fires.


Publication topics Publications
General overview
Stand stability
Long-term site productivity
  • Wei, X., W. Liu, M. Waterhouse, and H. Armleder. 2000. Simulations on impacts of different management strategies on long-term site productivity in lodgepole pine forests of the central interior of British Columbia. For. Ecol. Manag. 133:217–229.
  • Wei, X., Q. Li, M.J. Waterhouse, and H.M. Armleder. 2012. Organic matter loading affects lodgepole pine seedling growth. Environ. Manag. 49(6):1143–1149.