According to Greg Latta, an OSU faculty research assistant and principal investigator on the study, most of the climate scenarios that were used showed increases in temperatures from one to eight degrees but precipitation projections were all over the map, sometimes up and sometimes down. At lower elevations, tree growth is constrained when moisture is limited and drought stress is an issue.
"The lower-elevation forests are getting warmer just like those at higher elevations, but in most scenarios the precipitation doesn't increase enough there to offset that," Latta said. "The cumulative effect could be declines in forest growth of 1 to 3 percent a year in low-elevation Oregon forests, which could have a substantial long-term impact if trees are being managed for timber harvest."
Among the findings of the study:
|Contact: Greg Latta|
Oregon State University