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Keyword: Pinus contorta

Reconstructing mountain pine beetle outbreaks in the Colorado Front Range

Science Spotlights Posted on: September 02, 2020
From the late 1990s through the mid-2010s there have been extensive outbreaks of mountain pine beetle across the west from the Southern Rockies to British Columbia. It is often thought that these outbreaks are “unprecedented.” An understanding of historical disturbances is particularly critical as we continue to develop strategies for forest management under climate change.

Impacts of mountain pine beetle outbreaks on lodgepole pine forests in the Intermountain West, U.S., 2004–2019

Publications Posted on: July 31, 2020
Mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae), is the most important forest insect in western North America. We determined causes and rates of tree mortality and changes in forest structure and composition associated with D. ponderosae outbreaks in the Intermountain West, U.S.

Reconstructing historical outbreaks of mountain pine beetle in lodgepole pine forests in the Colorado Front Range

Publications Posted on: July 27, 2020
Regional-scale mountain pine beetle (Dendroctonus ponderosae) outbreaks in the first decade of the 2000s affected millions of hectares of lodgepole pine (Pinus contorta) in western North American forests. In Colorado, 1.4 million ha exhibited high mortality. These events prompted questions about whether historical outbreaks reached the scale of this most recent event.

A regional assessment of the ecological effects of chipping and mastication fuels reduction and forest restoration treatments.

Publications Posted on: December 04, 2019
Over the past several years, fire managers have increased their use of mastication treatments, the on-site disposal of shrubs and small-diameter trees through chipping and shredding. Mastication is a relatively untested management practice that alters the chemical and physical conditions of the forest floor and may influence vegetation regrowth and fuel development for years or decades.

Biological aspects of mountain pine beetle in lodgepole pine stands of different densities in Colorado, USA

Publications Posted on: September 14, 2019
Research Highlights: The biology of mountain pine beetle (MPB), Dendroctonus ponderosae Hopkins, in Colorado’s lodgepole pine forests exhibits similarities and differences to other parts of its range. Brood emergence was not influenced by stand density nor related to tree diameter. The probability of individual tree attack is influenced by stocking and tree size.

Mountain pine beetle in Colorado: A story of changing forests

Publications Posted on: December 06, 2018
The mountain pine beetle (MPB) (Dendroctonus ponderosae) is one of the most prevalent disturbance agents in western conifer forests. It utilizes various species of pines (Pinus spp.) as host trees. Eruptive populations can cause extensive tree mortality. Since the late 1990s, extensive outbreaks have occurred from the southern Rockies to British Columbia. In Colorado, lodgepole pine (P. contorta) forests have been the most affected.

Subwatershed-level lodgepole pine attributes associated with a mountain pine beetle outbreak

Publications Posted on: October 03, 2018
Mountain pine beetle (Dendroctonus ponderosae Hopkins; MPB) is an aggressive bark beetle that attacks numerous Pinus spp. and causes extensive mortality in lodgepole pine (Pinus contorta Douglas ex Loudon; LPP) forests in the western United States and Canada.

Modelling the management of forest ecosystems: Importance of wood decomposition

Publications Posted on: May 10, 2018
Scarce and uncertain data on woody debris decomposition rates are available for calibrating forest ecosystem models, owing to the difficulty of their empirical estimations.

Probability of infestation and extent of mortality models for mountain pine beetle in lodgepole pine forests in Colorado

Publications Posted on: December 05, 2017
The mountain pine beetle, Dendroctonus ponderosae Hopkins, is a significant agent of tree mortality in lodgepole pine (Pinus contorta Dougl. ex Loud.) forests throughout western North America. A large outbreak of mountain pine beetle caused extensive tree mortality in north-central Colorado beginning in the late 1990s.

Mountain pine beetle dynamics and reproductive success in post-fire lodgepole and ponderosa pine forests in northeastern Utah

Publications Posted on: January 30, 2017
Fire injury can increase tree susceptibility to some bark beetles (Curculionidae, Scolytinae), but whether wildfires can trigger outbreaks of species such as mountain pine beetle (Dendroctonus ponderosae Hopkins) is not well understood. We monitored 1173 lodgepole (Pinus contorta var. latifolia Doug.) and 599 ponderosa (Pinus ponderosa Doug.