WWETAC Projects

Project Title: Influence of bark beetles and black stain root disease on delayed mortality predictions of prescribed fire-damaged ponderosa pine in the eastern Cascades

STDP ID: R6-2007-03

Status: Completed

Principal Investigator: Walt Thies, USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR

Collaborators: Douglas Westlind, USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR; Greg Filip, Forest Health Protection, R6, Portland, OR

E-mail Contact: wthies[at]fs.fed.us

Summary: The Malheur Ponderosa Pine Delayed Mortality model predicts mortality of individual trees based on fire-caused damage. Whereas other guidelines and models currently in use are based on a review of the literature or data sets collected from stands outside of the Pacific Northwest, this model for ponderosa pine (Pinus ponderosa Dougl. ex Laws.) is based on data from eastern Oregon. Based on data from three widely spaced stands not used in model development, the model appears to predict with a high degree of accuracy the probability of mortality for individual trees. However, the contribution of bark beetles to the predicted mortality has not been evaluated. This project will provide an evaluation of the newly published model to determine its usability for wildfires, extend the useful area of inference, and determine if bark beetles and black stain root disease contribute to the probability of mortality already predicted by the model, thus providing a useful tool for evaluating the impact of fire/bark beetles/black stain root disease on ponderosa pine delayed mortality.

Project ID: FY07TS31