Keyword: forest productivity

• Site index curves and tables for British Columbia: Coastal species.
  http://www.for.gov.bc.ca/hre/pubs/pubs/0001.htm
  The objective of this report was to disseminate, in graphical and tabular format, site index relationships selected by the Coastal Forest Productivity Council in cooperation with the Ministry of Forest and Lands for use on the coast of British Columbia. The species included coastal Douglas-fir (pseudotsuga menziesii (Mirb.) Franco), western hemlock (Tsuga heterophylla (Raf.) Sarg.), western redcedar (Thuja plicata Donn), amibilis fir (Abies amabilis (Dougl.) Forb.), Sitka spruce (Picea sitchensis (Bong.) Carr.), and red alder (Alnus rubra Bong.). The figures and corresponding tables were produced by a computerized plotting system, GRAFLEX. ...

• Effects of red alder on stand dynamics and nitrogen availability (FRBC Project HQ96400-RE MOF EP1121.01).
  http://www.for.gov.bc.ca/hre/pubs/pubs/0161.htm
  This extension note provides a summary of results obtained to date from studies initiated in 1992 to document and demonstrate the effects of different amounts and spatial arrangements of red alder on forest productivity, stand dynamics, and nitrogen availability in broadleaf-conifer mixedwood stands in coastal British Columbia. Replacement series experiments have been planted at two locations in B.C. to evaluate the effects of various proportions of red alder when grown in mixture with Douglas-fir. Mixedwood plantations have also been established at three locations following an additive design. In the additive design, Douglas-fir and western redcedar were planted at a density of 1100 tph (with the two species planted in equal proportions at alternating planting spots), and one of eight "broadleaf" density treatments was subsequently applied to randomly selected plots. These treatments included: 0, 50, 100, 200 and 400 red alder per hectare, 50 bigleaf maple per hectare, 200 Sitka alder per hectare, and a d ...

• Net Basal Area Response 9 Years after Fertilizing Thinned and Unthinned Douglas-fir.
  http://www.for.gov.bc.ca/hre/pubs/pubs/1183.htm
  Equations to estimate net basal area response of Douglas-fir to nitrogen fertilization in terms of initial stand attributes were developed, based on remeasurement data over a period of 9 years from 176 plots (0.05- 0.10 ha in size) of the British Columbia Forest Productivity Committee study. The data suggest that, in the slightly dry, nutrient-poor to medium sites in the CWHxm1 subzone on Vancouver Island, fertilizing immature Douglas-fir stands has several effects: On the average, it results in a stand net basal area cumulative response of about 5% (2.0 m2 /ha) in the unthinned stands, and about 7% (3.2 m2 /ha) in the thinned stands, after 9 years with a single application of 225 kg N/ha. Doubling the fertilizer dosage from 225 kg N/ha to 450 kg N/ha on the average increased stand net basal area relative response 1.5-fold to about 11% in the thinned stands, but had no effect on the unthinned-stand response, after 9 years. Net basal area annual response dissipates wit ...

• Evaluation of Soil Degradation as a Factor Affecting Forest Productivity in British Columbia - A Problem Analysis - Phase II & III - Research Needs & Policy Evaluation
  http://www.for.gov.bc.ca/hre/pubs/pubs/1202.htm
  Evaluation of Soil Degradation as a Factor Affecting Forest Productivity in British Columbia - A Problem Analysis - Phase II & III - Research Needs & Policy Evaluation ...

• 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
  Silviculture Treatments for Ecosystem Management in the Sayward (STEMS) is a large-scale, multi-disciplinary experiment that compares forest productivity, economics, and public perception of seven silvicultural regimes replicated at three sites in the Sayward Forest. The STEMS experiment uses silvicultural systems and treatments to create diversity in forest structure that results in a variety of canopy layers (vertical structure) and spatial patchiness (horizontal structure) to enhance biodiversity and wildlife. The STEMS experiment examines seven different treatment regimes, namely: Extended Rotation (non-treatment control) Extended Rotation with Commercial Thinning Uniform Dispersed Retention Aggregate Retention Group Selection Modified Patch Cuts Clearcut with Reserves These silvicultural regimes create a range of gap sizes and frequencies that emulate natural variation in forest structure. STEMS is a replication of the "Silvicultural Options for Harvestin ...

• Adaptation to climate change in forestry.
  http://www.for.gov.bc.ca/hre/pubs/pubs/1397.htm
  Climate change adaptation strategies for the forest management sector should be based on the application of vulnerability assessment or risk management concepts. A planning framework for facilitating adaptation in forestry must address biophysical and socio-economic impacts, and will include policy and institutional considerations. The framework requires us to analyze the situation and assess current and future vulnerabilities of forests to climate change. We can then develop risk management strategies that include actions needed now and in the future to aid responses to climate changes. Adaptation needs to reduce current vulnerability to climate change and speed recovery after disturbance in a changed climate. The adaptation plan should include monitoring of the state of the forest to detect change. An example of using this framework to adapt to changing forest productivity is presented. Many forest ecosystems and species will have to adapt autonomously because management can only influence the timing and ...