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Keyword: Douglas fir

Stocktype and vegetative competition influences on Pseudotsuga menziesii and Larix occidentalis seedling establishment

Publications Posted on: May 31, 2018
Douglas fir (Pseudotsuga menziesii var. glauca (Mayr) Franco), and western larch (Larix occidentalis Nutt.) are species of ecological and commercial importance that occur throughout the Western United States. Effective reforestation of these species relies on successful seedling establishment, which is affected by planting stock quality, stocktype size, and site preparation techniques.

Lubrecht Fire-Fire Surrogate Study

Projects Posted on: April 10, 2018
Fuel treatment impacts in ponderosa pine - Douglas-fir forests in the Northern Rockies.

Idaho forest growth response to post-thinning energy biomass removal and complementary soil amendments

Publications Posted on: December 12, 2017
Utilization of woody biomass for biofuel can help meet the need for renewable energy production. However, there is a concern biomass removal will deplete soil nutrients, having short- and long-term effects on tree growth.

Understanding how forest genomics impact ecosystem vulnerability to climate change across the western United States

Science Spotlights Posted on: August 22, 2016
Utilizing genomics to identify species vulnerability to climate change is a newly emerging area of research. This project focuses on three species specifically chosen because they represent three highly distinct trees that are vulnerable in different ways to climate change: Fremont Cottonwood, Southwestern White Pine, and Douglas Fir. Understanding relationships between tree genomics, climate change, species migration, adaptive evolution and forest resiliency promises to revolutionize managment and conservation of natural resources.

Resin duct size and density as ecophysiological traits in fire scars of Pseudotsuga menziesii and Larix occidentalis

Publications Posted on: October 03, 2014
Resin ducts (RDs) are features present in most conifer species as defence structures against pests and pathogens; however, little is known about RD expression in trees following fire injury.

Changes in tracheid and ray traits in fire scars of North American conifers and their ecophysiological implications

Publications Posted on: September 17, 2014
Fire scars have been widely used as proxies for the reconstruction of fire history; however, little is known about the impact of fire injury on wood anatomy. This study investigates changes in tracheid and ray traits in fire scars of Douglas fir (Pseudotsuga menziesii), western larch (Larix occidentalis) and ponderosa pine (Pinus ponderosa), and discusses their ecophysiological implications for tree recovery from fire.

Return of the giants: Restoring white pine ecosystems by breeding and aggressive planting of blister rust-resistant white pines

Publications Posted on: June 30, 2010
In 1883, when the Northern Pacific Railroad made its way through northern Idaho, western white pines dominated the moist, mid-elevation, mixed-species forests of the Inland Northwest between 2,000 and 6,000 feet. These majestic trees often lived to 350 years but could reach the ripe old ages of 400 and even 500 years.

Analysis of algorithms for predicting canopy fuel

Publications Posted on: November 26, 2007
We compared observed canopy fuel characteristics with those predicted by existing biomass algorithms. We specifically examined the accuracy of the biomass equations developed by Brown (1978. We used destructively sampled data obtained at 5 different study areas. We compared predicted and observed quantities of foliage and crown biomass for individual trees in our study sites for ponderosa pine, Douglas fir, and lodgepole pine.