Height–diameter equations for boreal tree species in Ontario using a mixed-effects modeling approach |
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| Authors: | Mahadev Sharma John Parton |
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| Institution: | 1. Ministry of Natural Resources, Ontario Forest Research Institute, 1235 Queen St East, Sault Ste Marie, Ont. P6A 2E5, Canada;2. Ministry of Natural Resources, Timmins, Ont. P0N 1H0, Canada |
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| Abstract: | Height–diameter relationships based on stand characteristics (trees/ha, basal area, and dominant stand height) were investigated for balsam fir, balsam poplar, black spruce, jack pine, red pine, trembling aspen, white birch, and white spruce using data from permanent growth study plots in northern Ontario, Canada. Approximately half the data were used to estimate model parameters with the rest used for model evaluation. Multiple Chapman–Richards functions with parameters expressed in terms of various stand characteristics were fit to determine the best models for predicting height. |
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| Keywords: | Nonlinear least squares regression Mixed-effects modeling Boreal tree species Height&ndash diameter equations |
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