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Keyword: forest restoration

Is severe fire good or bad for spotted owls?

Science Spotlights Posted on: October 08, 2020
Whether severe fire is good or bad for spotted owls will influence how some forests are managed for fire risk. In reality, the effects of severe fire on spotted owls depends on the size of severely-burned patches, as well as their configuration and complexity. Owls actively use small patches of severely-burned forest, but they avoid larger patches and will abandon territories that are extensively affected by severe fire.

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.

Forest restoration treatments in a ponderosa pine forest enhance physiological activity and growth under climatic stress

Publications Posted on: June 03, 2020
As the climate warms, drought will increasingly occur under elevated temperatures, placing forest ecosystems at growing risk of extensive dieback and mortality. In some cases, increases in tree density following early 20th-century fire suppression may exacerbate this risk.

Simulating the effectiveness of improvement cuts and commercial thinning to enhance fire resistance in West Coast dry mixed conifer forests

Publications Posted on: May 22, 2020
Nine multipurpose silvicultural treatments, formulated as a synthesis of recently implemented prescriptions offered by forest managers, were simulated to evaluate their effectiveness at enhancing fire resistance.

New forest landscape model predicts how management policies affect future wildfire impacts

Science Spotlights Posted on: May 21, 2020
We integrated the widely used Forest Vegetation Simulator with FSim, a large wildfire simulator, to study how management policies affect future wildfire regimes. The model leverages decades of research and development on the respective forest growth and wildfire simulation models, and their integration creates a strategic forest landscape model that can be used to examine forest fire and management policy issues on National Forests in the western United States.

Modelling the effect of accelerated forest management on long-term wildfire activity

Publications Posted on: May 04, 2020
We integrated a widely used forest growth and management model, the Forest Vegetation Simulator, with the FSim large wildfire simulator to study how management policies affected future wildfire over 50 years on a 1.3 million ha study area comprised of a US national forest and adjacent lands.

Invasive Species Science Update (No. 12)

Publications Posted on: April 16, 2020
In this issue, we include topics from the importance of biocrusts on invasive versus native plant establishment, effects of dryland restoration on invasive plants, using native seed mixes (rather than nonnative grass mixes) to inhibit cheatgrass invasion after fire, and exploring volatiles of high-elevation pines to better understand resistance to insects and pathogens.

Climate has a larger effect than stand basal area on wood density in Pinus ponderosa var. scopulorum in the southwestern USA

Publications Posted on: April 02, 2020
Stand basal area of ponderosa pine (Pinus ponderosa var. scopulorum Engelm.) in the US Southwest has little effect on the density of the wood produced, but climatic fluctuations have a strong effect. Wood density increases during drought, particularly if the drought occurs in late winter/early spring.

The influence of American Chestnut (Castanea dentata) on nitrogen availability, organic matter and chemistry of silty and sandy loam soils

Publications Posted on: February 27, 2020
American chestnut trees once dominated vast areas of deciduous forest in eastern North America, but the exotic chestnut blight almost eliminated the species from the region. Introduction of blight-resistant American chestnut hybrids will probably start in the next decade after many years of tree breeding. What were the historic effects of chestnut on forest soils, and what changes may follow reintroduction of hybrid chestnuts?

Doughnuts don’t make trees fatter

Science Spotlights Posted on: May 06, 2019
Large, old trees, often called legacy trees, serve a foundational role in old-growth forests. Restoration efforts to improve vigor of legacy trees and decrease risk to high-intensity wildland fire and drought-mediated insect mortality often include reductions in stand density. However, sometimes regulatory and social constraints limit stand-level thinning options by requiring maintenance of closed canopies.

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