CORVALLIS, Ore. – 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 scientists ...

In Southwest Oregon, Douglas firs are dying. And warmer temperatures along with more severe droughts are making the problem worse. What does this mean for the future of forests in places like Ashland?

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. – Increases in mortality among Douglas-fir in the Klamath Mountains are the result of multiple factors that have the iconic tree in a “decline spiral” in parts of the region, a new ...

courtesy of the City of Ashland In Southern Oregon, Douglas firs are dying. And climate change is making the problem worse with more severe droughts and hotter temperatures. About 20% of Douglas firs ...

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 ...

Amid a years-long drought and insect infestation, Douglas fir have entered what scientists are calling a “decline spiral” in southwest Oregon. A study by Oregon State University faculty published in ...

Fir trees in Oregon and Washington died in record-breaking numbers in 2022, according to as-yet unpublished research conducted by the U.S. Forest Service. Called “Firmageddon” by researchers, the ...

About 80 miles east of the Linn County Courthouse, an expanse of blue-green trees gives way to jagged Cascade peaks that burst clouds, channel rivers and form the crown of a could-be national monument ...

WHEN the immortal frigate Constitution first put to sea in the year 1798, she carried as masts three lofty White Pines felled in Maine. Put when in 1925 these had to be removed, there was left no ...