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Keyword: Douglas-fir

Dendroctonus pseudotsugae (Coleoptera: Curculionidae: Scolytinae) sequential sampling data

Datasets Posted on: December 30, 2020
The Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, attacks Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco (Pinaceae), throughout western North America. Periodic outbreaks cause increased mortality of its host. Bark samples were obtained from 326 trees distributed over 21 stands during a 2-year period in the late winter to early spring of 1997 and 1998 in the Colorado Front Range.

An Axiom SNP genotyping array for Douglas-fir

Publications Posted on: December 18, 2020
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

Publications Posted on: November 18, 2020
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.

Lick Creek: Lessons learned after 20+ years of fuel treatments in a ponderosa pine forest

Science Spotlights Posted on: September 08, 2020
Lick Creek is the longest running fuel treatment and restoration study of ponderosa pine forests in the northern U.S. Rocky Mountains. Through repeat photography and numerous published studies, we show how fuels and vegetation have changed over the 25 years since treatment and compare the effects of mechanical harvesting with and without prescribed burning.

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

Publications Posted on: July 11, 2020
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

Publications Posted on: July 02, 2020
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

Publications Posted on: June 22, 2020
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

Publications Posted on: April 21, 2020
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

Publications Posted on: February 27, 2020
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

Publications Posted on: December 23, 2019
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.