Document: MAR-3-37-18

Size and growth rate as predictors of mortality in some east Texas trees.

FULTON, M.* 1 and P.HARCOMBE 2

Bemidji State University, Bemidji, MN 56601, U.S.A. 1
Rice University, Houston, TX 77251, U.S.A. 2

Abstract:
Growth rate alone (diameter increment) has been found to be an efficient predictor of mortality in sapling-sized trees. Extending mortality predictions to larger trees involves adding a measure of size into the set of predictor variables. We examined mortality as a function of growth history and size for a data set of trees on a mesic site in east Texas monitored for more than 15 years. The best logistic models for the prediction of mortality generally included some measure of size along with a measure of growth as predictor variables. No single set of predictor variables was found to be most efficient for all species, but the models incorporating either dbh or height as a measure of size and diameter increment as a measure of growth tended to perform well.

Keywords: mortality, growth, logistic model

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