A Local Basal Area Adjustment for Crown Width Prediction
Abstract:Nonlinear crown width regression equations were developed for 24 species common to the upper Lake States of Michigan, Minnesota, and Wisconsin. Of the species surveyed, 15 produced statistically significant (P < 0.05) local basal area effect coefficients showing a reduction in crown width with increasing stand density. No relation between shade tolerance and crown width was apparent, indicating the species-dependence of this parameter. Using adjusted R2 as a guide, nonlinear crown width models adapted for local basal area (NLCW adj) improved prediction for 20 of 24 species over a model lacking this component (NLCW). The ecological significance of the improvement shown for some species may be minor, but for others the difference was substantial (often 8%). North. J. Appl. For 18(1):22–28.
Keywords: Lake States; Nonllinear regression; crown width model; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; natural resource management; natural resources; stand density
Document Type: Miscellaneous
Publication date: 2001-03-01
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