Keyword: Douglas-fir

An Axiom SNP genotyping array for Douglas-fir

Background: In forest trees, genetic markers have been used to understand the genetic architecture of natural populations, identify quantitative trait loci, infer gene function, and enhance tree breeding. Recently, new, efficient technologies for genotyping thousands to millions of single nucleotide polymorphisms (SNPs) have finally made large-scale use of genetic markers widely available.

Fire-catalyzed vegetation shifts in ponderosa pine and Douglas-fir forests of the western United States

Increased wildfire activity combined with warm and dry post-fire conditions may undermine the mechanisms maintaining forest resilience to wildfires, potentially causing ecosystem transitions, or fire-catalyzed vegetation shifts. Stand-replacing fire is especially likely to catalyze vegetation shifts expected from climate change, by killing mature trees that are less sensitive to climate than juveniles.

Fuel treatment longevity in ponderosa pine-dominated forest 24 years after cutting and prescribed burning

Fuels reduction treatments to mitigate fire behavior are common in ponderosa pine ecosystems of the western United States. While initial impacts of fuel treatments have been reported, less is known about treatment longevity as live and dead fuels change with time.

Continental-scale tree-ring-based projection of Douglas-fir growth: Testing the limits of space-for-time substitution

A central challenge in global change research is the projection of the future behavior of a system based upon past observations. Tree-ring data have been used increasingly over the last decade to project tree growth and forest ecosystem vulnerability under future climate conditions. But how can the response of tree growth to past climate variation predict the future, when the future does not look like the past?

Stereo photo guide for estimating canopy fuel characteristics in conifer stands

Stereo photographs, hemispherical photographs, and stand data are presented with associated biomass and canopy fuel characteristics for five Interior West conifer stands.

A biodegradable formulation of MCH (3-methylcyclohex-2-en-1-one) for protecting Pseudotsuga menziesii from Dendroctonus pseudotsugae (Coleoptera: Curculionidae) colonization

Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, trees and stands can be protected from Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins (DFB)-caused mortality by application of synthetic formulations of the beetle’s antiaggregation pheromone, 3-methylcyclohex-2-en-1-one (MCH).

Spotted knapweed (Centaurea biebersteinii DC) response to forest wildfires on the Bitterroot National Forest, Montana

The 2000 Bitterroot wildfires in Montana burned 124,250 ha of forest and rangelands on the Bitterroot National Forest. Because spotted knapweed (Centaurea biebersteinii DC) is common on the Bitterroot National Forest, there is a high potential of expanded knapweed populations following the wildfires. A stratified random sample was used to study forest vegetation development following the wildfires.

Example SDI-based prescriptions: Treatment prescriptions for commercial harvest units, Trout West Fuels Reduction Project, Manitou Experimental Forest

The sites described below are located in Ponderosa pine Forest Type on the Manitou Experimental Forest. The sites are bounded by meadows along Trout Creek on the west, Hotel Gulch, on the south, Missouri Gulch on the north, and the Ridgewood subdivision on the east. The area consists of gentle west-sloping terrain intersected by a series of small east-west ridges. No live streams exist in the area. Elevations range from 7,700 to 8,000 ft.