Modeling the Probability of Individual Tree Mortality (Classic Reprint)

Download or read book Modeling the Probability of Individual Tree Mortality (Classic Reprint) written by David Alexander Hamilton Jr. and published by Forgotten Books. This book was released on 2018-09-10 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Modeling the Probability of Individual Tree Mortality The mortality model can be used to help schedule management activities. Stands of trees for which the model predicts high mortality rates should be considered high risk stands susceptible to insect and disease outbreaks and should be logged, salvaged, or otherwise treated before stands composed of trees with low predicted mortality rates. Mortality models also reveal relationships that may provide a better understanding of how and why mortality occurs in a stand. This information is valuable in management planning and in developing strategies to control mortality. The models discussed in this paper were developed by means of a three - step analy sis. The first step is to screen the independent variables for those that show the strongest relationships to the probability of mortality. The variables selected as most significant by the screening algorithm are used as predictors of the probability of mortality in a logistic model. The regression coefficients for this model are then estimated by a nonlinear regression program, risk (hamilton The final step, model verification, employs a chi-square statistic to evaluate the accuracy with which the proposed model predicts the mortality that occurred on an independent data set. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.