Enhanced mortality equations for trees in the mixed conifer zone of Southwest Oregon
By: by David W. Hann and Mark L. Hanus.
Contributors: Hanus, Mark L.; Oregon State University. Forest Research Laboratory.
Series: Research contribution / Oregon State University, College of Forestry, Forest Research Laboratory -- 34.; Research contribution (Oregon State University. Forest Research Laboratory) -- 34.
Publisher: Oregon State University, College of Forestry, Forest Research Laboratory
Published: 2001
Place of publication: Corvallis, Or
Language: eng
Number of pages: 34
Subjects: Dead trees -- Oregon -- Mathematical models.; Forest dynamics -- Oregon -- Mathematical models.; Forests and forestry -- Oregon -- Measurement -- Mathematical models.
Description: Equations for predicting the probability of a tree's dying in the next 5 years are presented for eight conifer and eight hardwood tree species from southwest Oregon. A logistic equation form was used to characterize the probability of mortality. The parameters of the equation were estimated using weighted, maximum likelihood procedures. These equations are being incorporated into the new southwest Oregon version of ORGANON, a model for predicting stand development. In particular, the equations extend the previous model to older stands and stands with a heavier component of hardwood tree species.
Notes: "November 2001."

Includes bibliographical references (p. 23-25).

Also issued online.