Keyword: coarse woody debris

• Coarse woody debris decomposition documented over 65 years on southern Vancouver Island.
  http://www.for.gov.bc.ca/hre/pubs/pubs/0666.htm
  In 1929-1930, Stig Schenström and J.D. Curtis established an experiment to study thinning dynamics of Douglas-fir (pseudotsuga menziesii (Mirb.) Franco) on southern Vancouver Island, British Columbia. As a subcomponent of the experiment, the coarse woody debris (CWD) from the previous stand were mapped and the decay condition classified on five permanent plots. These scaled drawings and classifications were updated in 1945-1947 and 1995-1996. This unique 65-year period of CWD observation confirms that observations of CWD volume loss on Vancouver Island are similar to elsewhere in the Pacific Northwest. The simple exponential decay rate constant was 0.022/year based on volume of primarily Douglas-fir on the five plots. The decay rate constant by large-end diameter was 0.067/year for logs 80 cm. ...

• Coarse Woody Debris decomposition - principles, rates and models.
  http://www.for.gov.bc.ca/hre/pubs/pubs/1206.htm
  Presented to: Northern Interior Vegetation Management Association (NIVMA) and Northern Silviculture Committee (NSC) Winter Workshop: Optimizing wildlife trees and coarse woody debris retention at the stand and landscape level. January 22-24, 2002. Prince George, B.C. (Abstract published in meeting proceedings). ...

• Silviculture Treatments for Ecosystem Management in the Sayward (STEMS): Establishment Report for STEMS 1, Snowden Demonstration Forest
  http://www.for.gov.bc.ca/hre/pubs/pubs/1336.htm
  Douglas-fir Young-Growth Production Forests" in the Capitol Forest near Olympia, Washington, developed jointly by the managers of the Washington State Department of Natural Resources and the scientists of the Pacific Northwest Research Station. The decision to replicate the treatments in the Sayward Forest was based on the similarity of knowledge gaps in the Sayward Forest and the Capitol Forest and because replication in Washington and British Columbia results in greater statistical power and ability to extrapolate over a wide geographic area. This technical report describes the establishment of the first replication of STEMS in 2001 in the Snowden Demonstration Forest. Ongoing studies include: Tree growth and stand development, including understory vegetation Regeneration and light availability Windthrow, mortality, and coarse woody debris recruitment Harvesting production and impacts of residual tree damage and soil disturbance (in partnership with the Forest Engineering and Re ...

• Coarse woody debris: inventory, decay modelling, and management implications in three biogeoclimatic zones.
  http://www.for.gov.bc.ca/hre/pubs/pubs/1342.htm
  To assess recent management practices, post-harvest levels of coarse woody debris (CWD) were measured in the Southern Interior and Northern Interior forest regions of British Columbia. A simple input and decay model was used to estimate the volumes of CWD that might be present at the end of managed forest rotations. In four ecosystems (Sub-Boreal Spruce [SBS] mk1 variant, Interior Douglas-fir [IDF] dm2 variant, Interior Cedar–Hemlock [ICH] dw variant, and ICHvk2/wk3 variants) that were sampled a few years after harvest, between 58 and 80% of the CWD volume came from pieces less than 6 m in length. Modelling of CWD decay and net new CWD input from the developing stand indicated that by rotation end (after 90 years), CWD volumes would have decreased to about 15% (SBSmk1) and 1% (IDFdm2) of the CWD volumes found in mature unmanaged stands. In the ecosystems studied, this research suggests that specific management guidance for deadwood will be required to maintain CWD (outside of reserves) in managed stands. V ...