PACIFIC SOUTHWEST FOREST AND RANGE EXPERIMENT STATION BERKELEY CA
In this preliminary study a generalized linear model is used to describe the conditional probability of a tree being attacked by mountain pine beetles in a given year, given the characteristics of the tree e.g., size and the location of other attacked trees in the stand. The model is used to analyze mountain pine beetle attack data in two lodgepole pine stands in Oregon over a period of 10 years see Fig. 1 and 2. The data may be viewed as a realization of a spatial point process with the probability of a tree being attacked dependent on the status of other trees in the stand. Although full maximum likelihood estimation is apparently not feasible, maximum pseudolikelihood estimates of the parameters can be readily calculated with standard statistical packages such as GLIM.
This article is from 'Computing Science and Statistics: Proceedings of the Symposium on Interface Critical Applications of Scientific Computing (23rd): Biology, Engineering, Medicine, Speech Held in Seattle, Washington on 21-24 April 1991,' AD-A252 938, p491-494.