Forest Investment Account

Abstract of FII Project R2003-138

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Sitka Alder - Competitor or Benefactor? Re-evaluating Sitka Alder's Impact on Free Growing Declarations.

Author(s): Lohr, Christine (G.P.S. Forest Consultants Ltd.)
Subject: Biodiversity, Forestry, Landscape ecology, Silviculture/Forest Management Systems
Series: Forest Investment Account (FIA) - Forest Science Program


On areas under prescription, sitka alder (Alnus viridus spp. sinuata) can prevent free growing declarations. This shrub is beneficial as a nitrogen fixer, yet still acts as a 'competitor' according to the Establishment to Free Growing Guidebook. The silviculture surveyor needs objective criteria to assess free growing status on alder / conifer complexes. Growth differences on lodgepole pine (Pinus contorta) growing with and without sitka alder on upland Cariboo sites will be compared. An objective methodology for assessing the impact of sitka alder on lodgepole pine will then be generated, and recommendations to improve the guidebook will be made.

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Updated September 08, 2005 

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