By Glenn Ahrens, OSU Forestry and Natural Resources Extension Agent – Clackamas, Marion, & Hood River Counties

Dying Douglas-fir trees have been a common sight in western Oregon in recent years due to drought-related problems, exacerbated by diseases and insects that attack stressed trees. History shows that periodic drought is to be expected in western Oregon and Douglas-fir forests are adapted to summer heat and drought to some extent. But extreme drought causes tree morality and raises concerns. In the news about climate change, there is a lot of talk about higher levels of heat and drought being the “new normal”. Is the recent drought “normal” or “abnormal” for western Oregon?  Either way, how can we manage our forests to improve their resilience – their ability to withstand climatic extremes? Continue reading →