Douglas-fir is one of the world's best timber-producing species and yields more timber than any other species in North America, making the forestlands of western Oregon, Washington, and British Columbia the most productive on the continent. In 2011, Douglas-fir represented 34.2% of US lumber exports, to a total of 1.053 billion board-feet.

In the Sierra Nevada, Douglas-fir is a common part of the mixed conifer forest as far south as the Yosemite region. The range of Douglas-fir is fairly continuous through northern Idaho, western Montana, and northwestern Wyoming.

Douglas firs are evergreen trees, meaning they keep their needle-like leaves year-round. There are two varieties of this species, coast Douglas fir and Rocky Mountain Douglas fir, which are differentiated by their habitats, growth rates, and physical characteristics.

Mar 14, 2013 · The dataset contains 3 maps that show the current and predicted range of Douglas fir (pseudotsuga menziesii) in the Pacific Northwest region. The layers include: 1) the species range modeled under current climate conditions for 1950-75 2) a continuous model of the predicted range for 1950-2006 and 3) potential range expansion and contraction ...

Jun 3, 2021 · Douglas-fir trees are widespread in western North America. Coast Douglas-fir extend from central British Columbia south along the Pacific Coast Ranges into central California, over 1,367 miles. Temperature limits the species’ distribution in the north, while moisture is limiting in the south.

Douglas-fir is known to reach diameters of up to 50 inches in the Tepee Creek area and heights of approximately 100 feet just west of Meadowlark Lake. Trees of up to 400 years old are known from the Tepee Creek area.

Seeds from the northern portion of coast Douglas-fir's range tend to be larger than seed from the south . Dispersal: Douglas-fir seeds have a relatively large, single wing and are primarily dispersed by wind and gravity.

Douglas-fir is widely scattered throughout western North America from the mountains of Mexico to Brit-ish Columbia, Canada (fig. 1). Two subspecies have been identified. Coastal Douglas-fir (variety menziesii ) is found west of the Cascade Range and Sierra Nevada from sea level to 5,000 feet. Rocky Mountain Douglas-fir (variety glauca (Biessn.)

Douglas-fir occurs in all series and at elevations ranging from sea level to 5600 feet. Rather than any particular parent material, soil depth, or aspect, Douglas-fir regeneration is associated with recently disturbed ground.

Dec 20, 2024 · The range of Douglas-fir is fairly continuous through northern Idaho, western Montana, and northwestern Wyoming. Several outliers are present in Alberta and the eastern-central parts of Montana and Wyoming, the largest being in the Bighorn Mountains of Wyoming.