LINKING INDIVIDUAL-TREE AND STAND-LEVEL GROWTH-MODELS

An algorithm is presented to provide a linkage between stand-level models and individual-tree models. The algorithm is based on the assumptions that stand-level estimates of basal area, trees per unit area, and average diameter are correct and that the projected individual trees must be adjusted to equate to the stand-level estimates. The form of the individual-tree model is not important so long as initial and projected tree lists are provided. It is further assumed that the relative growth between individuals is to be maintained and the adjusted survivals are restricted to be less than or equal to 100%. Simplifications of the general algorithm are also developed. These simplifications take the form of dropping the survival equation from the individual-tree model and dropping the average diameter estimate from the stand-level model. Examples are provided of a bimodal diameter distribution.