A Competition Process Driven Growth Model for Red Pine

📖 The Scoop

Description of a simulation model, predicting individual tree growth and mortality using data from a red pine spacing trial. Central elements of the model are changes in relative growth rates as related to changes in tree size, the size of the individual tree relative to the median population size, and the overall stand density. The model parameters are biologically interpretable as measures of the process of competition. Data from 6 spacings were used to develop the model whereas a different data set from 8 spacings served to validate the model. Inclusion of random but correlated error components provided the basis for stochastic simulations. Based on individual stem volume and stand area at age 10 as input, the model was used to predict trends in tree volume distributions until age 35. A detailed graphical representation of model output (summary statistics of stem volume distributions) is presented and compared with observed data.

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