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Keyword: thinning

Short- and long-term effects of ponderosa pine fuel treatments intersected by the Egley Fire Complex, Oregon, USA

Publications Posted on: December 04, 2019
Fuel treatments are widely used to alter fuels in forested ecosystems to mitigate wildfire behavior and effects. However, few studies have examined long-term ecological effects of interacting fuel treatments (commercial harvests, pre-commercial thinnings, pile and burning, and prescribed fire) and wildfire.

Restoration thinning impacts surface and belowground wood decomposition

Publications Posted on: September 14, 2019
Forest thinning to protect the soil and improve hydrologic function is used to alter stand structure and increase residual tree growth. However, little is known about how surface and belowground wood decomposition (i.e., soil process changes) respond to aboveground vegetation manipulation.

Big trees, bark beetles, goshawks, and timber

Science Spotlights Posted on: August 21, 2019
Throughout the Rocky Mountains over the last century, large ponderosa pine trees provided lumber for growing cities and towns, along with fuel and timber for the mining and railroad industries. Most of these forests are now occupied by dense young and mid-aged forests highly susceptible to being killed by bark beetles and burned by wildfires. These conditions have been exacerbated by fire suppression and urban encroachment. As a result, knowledge is needed to inform management actions directed at restoring and conserving ponderosa pine forests. 

Soil greenhouse gas, carbon content, and tree growth response to biochar amendment in western United States forests

Publications Posted on: February 21, 2019
Restoring overstocked forests by thinning and pyrolyzing residual biomass produces biochar and other value‐added products. Forest soils amended with biochar have potential to sequester carbon (C), improve soil quality, and alter greenhouse gas (GHG) emissions without depleting nutrient stocks. Yet, few studies have examined the effects of biochar on GHG emissions and tree growth in temperate forest soils.

Restoration treatments in a Montana ponderosa pine forest: Effects on soil physical, chemical and biological properties

Documents and Media Posted on: November 30, 2018
Low-elevation ponderosa pine ecosystems of the inland northwestern United States experienced frequent, low-severity fire that promoted open stands dominated by large diameter ponderosa pine (Pinus ponderosa). Fire exclusion has led to increased stand densities, often due to proliferation of less fire-tolerant species and an increased risk of stand-replacing wildfire.Document Type: Other Documents

Maintaining soil productivity during forest or biomass-to-energy thinning harvests in the western United States

Documents and Media Posted on: September 19, 2018
Forest biomass thinnings, to promote forest health or for energy production, can potentially impact the soil resource by altering soil physical, chemical, and/or biological properties. The extent and degree of impacts within a harvest unit or across a watershed will subsequently determine if site or soil productivity is affected.Document Type: Other Documents

Forest structure and fire hazard in dry forests of the Western United States

Publications Posted on: August 01, 2018
Fire, in conjunction with landforms and climate, shapes the structure and function of forests throughout the Western United States, where millions of acres of forest lands contain accumulations of flammable fuel that are much higher than historical conditions owing to various forms of fire exclusion.

Amount and location of damage to residual trees from cut-to-length thinning operations in a young redwood forest in northern California

Publications Posted on: July 10, 2018
A cut-to-length (CTL) harvest system using a harvester and forwarder has been recently introduced in northern California (USA) for thinning young (

Managing western white pine plantations for multiple resource objectives

Publications Posted on: May 11, 2018
Western white pine (Pinus monticola Dougl. ex D. Don) continues to be one of the most important coniferous tree species growing in Northern Rocky Mountain forests. Because large wildfires occurred early in the 1900s, many plantations of western white pine with varying levels of resistance to blister rust (Cronartium ribicola Fisch.) were established.

Managing emerging threats to spotted owls

Publications Posted on: May 10, 2018
The 3 spotted owl (Strix occidentalis) subspecies in North America (i.e., northern spotted owl [S. o. caurina], California spotted owl [S. o. occidentalis], Mexican spotted owl [S. o. lucida]) have all experienced population declines over the past century due to habitat loss and fragmentation from logging.

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