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Keyword: Dendroctonus

Management of western North American bark beetles with semiochemicals

Publications Posted on: June 01, 2018
We summarize the status of semiochemical-based management of the major bark beetle species in western North America. The conifer forests of this region have a long history of profound impacts by phloem-feeding bark beetles, and species such as the mountain pine beetle (Dendroctonus ponderosae) and the spruce beetle (D. rufipennis) have recently undergone epic outbreaks linked to changing climate.

Fires following bark beetles: Factors controlling severity and disturbance interactions in ponderosa pine

Publications Posted on: January 09, 2018
Previous studies have suggested that bark beetles and fires can be interacting disturbances, whereby bark beetle-caused tree mortality can alter the risk and severity of subsequent wildland fires. However, there remains considerable uncertainty around the type and magnitude of the interaction between fires following bark beetle attacks, especially in drier forest types such as those dominated by ponderosa pine (Pinus ponderosa Lawson & C.

Managing bark beetle impacts on ecosystems and society: priority questions to motivate future research

Publications Posted on: November 16, 2016
Recent bark beetle outbreaks in North America and Europe have impacted forested landscapes and the provisioning of critical ecosystem services. The scale and intensity of many recent outbreaks are widely believed to be unprecedented. The effects of bark beetle outbreaks on ecosystems are often measured in terms of area affected, host tree mortality rates, and alterations to forest structure and composition.

Long-term landscape changes in a subalpine spruce-fir forest in central Utah, USA

Publications Posted on: March 23, 2016
In Western North America, increasing wildfire and outbreaks of native bark beetles have been mediated by warming climate conditions. Bioclimatic models forecast the loss of key high elevation species throughout the region. This study uses retrospective vegetation and fire history data to reconstruct the drivers of past disturbance and environmental change.

Effectiveness of bifenthrin (Onyx) and carbaryl (Sevin SL) for protecting individual, high-value conifers from bark beetle attack (Coleoptera: Curculionidae: Scolytinae) in the Western United States

Publications Posted on: May 07, 2015
High-value trees, such as those located in residential, recreational, or administrative sites, are particularly susceptible to bark beetle (Coleoptera: Curculionidae: Scolytinae) attack as a result of increased amounts of stress associated with drought, soil compaction, mechanical injury, or vandalism. Tree losses in these unique environments generally have a substantial impact.

Bark beetles, tree chemistry, and wildfires

Projects Posted on: April 22, 2015
Rocky Mountain Research Station scientists and collaborators are working to determine how bark beetle attacks change the moisture and chemistry of several tree species and how these changes affect flammability. Findings will allow us to improve fire behavior and risk models to better predict and manage wildfires and protect property and human life. 

The once and future forest: Consequences of mountain pine beetle treatment decisions

Publications Posted on: June 27, 2014
Entomologists and silviculturists have long recommended management of stand basal area and/or mean tree diameter to mitigate the risk of mountain pine beetle (MPB) (Dendroctonus ponderosae Hopkins) outbreaks while simultaneously reducing wildfire risk.

Ecological consequences of mountain pine beetle outbreaks for wildlife in western North American forests

Publications Posted on: January 27, 2014
Mountain pine beetle (Dendroctonus ponderosae) (MPB) outbreaks are increasingly prevalent in western North America, causing considerable ecological change in pine (Pinus spp.) forests with important implications for wildlife. We reviewed studies examining wildlife responses to MPB outbreaks and postoutbreak salvage logging to inform forest management and guide future research.

The role of temperature variability in stabilizing the mountain pine beetle-fungus mutualism

Publications Posted on: October 23, 2013
As global climate patterns continue to change and extreme weather events become increasingly common, it is likely that many ecological interactions will be affected. One such interaction is the multipartite symbiosis that exists between the mountain pine beetle and two species of fungi, Grosmannia clavigera and Ophiostoma montium.

Interactions among the mountain pine beetle, fires, and fuels

Publications Posted on: September 06, 2013
Bark beetle outbreaks and wildfires are principal drivers of change in western North American forests, and both have increased in severity and extent in recent years. These two agents of disturbance interact in complex ways to shape forest structure and composition.