The iconic Douglas-fir has been standing tall in Oregon for many centuries. But the evergreen species isn't doing so well lately, with many trees dying off in parts of the Klamath Mountains of ...

Douglas fir is the most abundant tree species in the Pacific Northwest. It’s Oregon’s official state tree. And it’s arguably the region’s most important timber species. But like true firs, western ...

CORVALLIS, Ore. (KTVZ) – Douglas-fir trees will likely experience more stress from drier air as the climate changes than they will from less rain, computer modeling by Oregon State University ...

PORTLAND, Ore. (KOIN) – Drier air caused by the changing climate is stressing Douglas fir trees, Oregon State University researchers say. The stress these trees experience from drier air is more than ...

Some of the most spectacular forests of Douglas fir in the West are found on the west slope of the Cascade Mountains in Oregon. Though heavily logged by the timber industry for its straight-grained ...

PORTLAND, Ore. — This week we're heading on a hunting trip with “man’s best friend” who has the keenest sense of smell for finding underground treasure just under the forest duff — it’s an Oregon ...

Courtesy of Oregon State University A new survey finds a growing number of Douglas fir trees in the Oregon Coast Range have been infected over the past decade with the fungal disease known as Swiss ...

Drought can damage and sometimes kill Douglas-fir trees. Dying trees have been spotted frequently in western Oregon this spring. (Glenn Ahrens) Many Oregonians have noticed widespread damage in ...

Oregon’s iconic Douglas firs are declining as the state’s summers have grown hotter and drier. Drought also is killing grand fir, and may be contributing to declines in Western red cedar and bigleaf ...

He was born in Scotland more than two centuries ago. He came to Oregon by default and only spent a few years here. He lived just 35 years old and may have been a murder victim while in Hawaii. But for ...