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Keyword: thinning

Long-term efficacy of diameter-limit cutting to reduce mountain pine beetle-caused tree mortality in a lodgepole pine forest

Publications Posted on: March 03, 2016
Mountain pine beetle, Dendroctonus ponderosae Hopkins, is the most significant mortality agent in pine forests of western North America. Silvicultural treatments that reduce the number of susceptible host trees, alter age and size class distributions, and diversify species composition are considered viable, long-term options for reducing stand susceptibility to mountain pine beetle-caused tree mortality.

Influence of mountain pine beetle epidemic on winter habitat conditions for Merriam's turkeys: Management implications for current and future condition

Publications Posted on: February 01, 2016
Understanding response of ponderosa pine (Pinus ponderosa) forest development following a mountain pine beetle (MPB; Dendroctonus ponderosae) epidemic has important management implications for winter habitat conditions for Merriam’s wild turkeys (Meleagris gallopavo merriami; hereafter, turkeys).

Beaver Creek Experimental Watershed: Research on fuel treatment effects

Projects Posted on: January 04, 2016
In the mid-2000's researchers reinstated research at Beaver Creek Experimental Watershed (BCEW) to collect data on climate, stream flow, vegetation, forest floor, and soil conditions. The Southwest Watershed Science Team and Northern Arizona University are exploring the effects of fuel treatments on stream flow, vegetation, forest floor, and soil conditions at the BCEW. The main goal of ongoing research is to provide land managers with information about the ecological effects of fuel treatments in the ponderosa pine forests and pinyon-juniper woodlands at a watershed scale.

Fire and fire-surrogate study: Soil moisture availability

Projects Posted on: December 15, 2015
Forests in the western United States are more dense and have more down fuels now than under historic conditions, mostly due to anthropogenic influences such as grazing and fire-suppression. Managers have recognized this problem and have acted to reduce stem density and fuels by thinning, burning, and/or fuel treatments. This Fire and Fire-Surrogate (FFS) study evaluates prescribed fire, thinning, and various mechanical treatment methods for treating, removing, or using woody biomass.

Managing for Wildfire Every Single Day of the Year

Lab Notes Posted on: December 09, 2015
Managing for Wildfires Every Single Day of the Year Posted by Carita Chan, U.S. Forest Service Research & Development, on May 29, 2015

Reducing spruce beetle-caused mortality in the southern Rocky Mountains

Science Spotlights Posted on: October 09, 2015
Rocky Mountain Research Station scientists, partnered with Forest Service Forest Health Protection, initiated a project in Engelmann spruce (Picea engelmannii) stands on national forests in Arizona, Utah, and Wyoming. This project was initiated to address entomologists' uncertainty about the success of partial cutting as a method to reduce bark beetle-caused tree mortality. Researchers discovered how implementing partial cutting of forests over a geographic area could help mitigate the spruce beetle (Dendroctonus rufipennis) outbreaks, which have been anecdotally linked to the changing climate throughout western North America.

Dry coniferous forest restoration and understory plant diversity: The importance of community heterogeneity and the scale of observation

Publications Posted on: August 27, 2015
Maintaining understory plant species diversity is an important management goal as forest restoration and fuel reduction treatments are applied extensively to dry coniferous forests of western North America.

Effects of thinning a 55-year-old western white pine stand

Publications Posted on: August 14, 2015
The first experiment in thinning western white pine (Pinus monticola Dougl.) was planned and established by J. A. Larson and D. R. Brewster in 1914 in a 55-year-old stand on the Priest River Experimental Forest, Idaho. It was designed to compare the effects of three thinning treatments on volume and quality growth, and on total volume production with an unthinned stand.

Thinning from below in a 60-year-old western white pine stand

Publications Posted on: August 14, 2015
Thirty-year results from a test of thinning a 60-year-old western white pine stand indicate that thinning does not appreciably change total volume growth, but it does improve the quality of the final product by increasing diameter growth and improving stand composition. This test was established in 1919 on the Priest River Experimental Forest, Idaho, to test three degrees of thinning from below in a 60- year-old stand of western white pine.

Effect of cultural treatments on regeneration of native woodlands on the Northern Great Plains

Publications Posted on: August 12, 2015
Two cultural treatments were evaluated over a 6-year post-treatment period to determine their effect on regeneration of native woodlands in southwestern North Dakota. Cultural treatments included livestock exclusion and the combination of felling and removal of low-vigor trees and transplanting of woody plants. Shrub density varied by species when grazed and ungrazed treatments were compared.

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