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Trembling aspen site index in relation to site quality in northern British Columbia

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Title: Trembling aspen site index in relation to site quality in northern British Columbia
Author: Klinka, Karel; Chen, Han Y. H.; Chourmouzis, Christine
Subject Keywords Black spruce;Boreal White and Black Spruce zone;Edatope;Elevation;Forest productivity;Forest site index;Forest site quality;Latitude;Moisture;Populus tremuloides;Trembling aspen;White spruce
Issue Date: 1998
Publicly Available in cIRcle 2008-04-15
Publisher Forest Sciences Department, University of British Columbia
Series/Report no. Scientia Silvica extension series, 1209-952X, no. 17
Abstract: Accurate and reliable predictions of site index (height of dominant trees at a reference age, usually 50 years at breast-height) for timber crop species is essential for silvicultural site-specific decision making. Site index can be predicted from site quality once the relationship between site index and site quality has been quantified. Site quality is defined as the sum of all environmental factors affecting the biotic community, such as the factors directly influencing the growth of vascular plants (light, heat, soil moisture, soil nutrients, and soil aeration). Since these factors vary greatly in time, indirect estimates of site quality have widely been used as predictors for site index in various multiple regression models. Trembling aspen (Populus tremuloides Michx.) is the most widely distributed broadleaf species in British Columbia, especially in the Boreal White and Black Spruce (BWBS) biogeoclimatic zone. Growing this species for sustainable timber production requires a good understanding of its productivity attributes and accurate predictions of its growth. This extension note presents (1) relationships between trembling aspen site index and some indirect measures of site quality, and (2) site index prediction models using the indirect measures of site quality as predictors.
Affiliation: Forestry, Faculty ofForest Sciences, Department of
URI: http://hdl.handle.net/2429/700
Peer Review Status: Reviewed

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