Sentences with phrase «by beetle outbreak»

For mountain pine beetles, the study found fire severity was high immediately after an outbreak, but over time as the number of trees killed by the beetle outbreak grew, fire severity leveled out.

Not exact matches

In the forestry sector, warmer winter temperatures linked to climate change is the major factor contributing to the outbreak of the mountain pine beetle in Western Canada, which had reduced the economic value of over 18 million hectares of Canadian forest by 2012.

Over the past decade North American forests have been decimated by outbreaks of mountain pine beetles

And if you've hiked in the Rockies since 2009, you've likely hiked through a dead and dying forest, felled by a widespread outbreak of the mountain pine beetle.

«Fire severity in southwestern Colorado unaffected by spruce beetle outbreak.»

However, the researchers also considered another possibility: If forests regenerate as mosaics of suitable trees on the landscape (based on size and density), though individual trees may come under attack by bark beetles, this variability might also protect the forest from broad - scale outbreaks.

By leading to variability in the density and size of trees that grow during recovery, large fires reduce the future vulnerability of forests to bark beetle attacks and broad - scale outbreaks.

The combination of forest stress created by drought and the warming climate, in conjunction with the overstocked conditions, led to a huge pine beetle outbreak and massive forest mortality.

«The current spruce beetle outbreak has the potential to expand and intensify and have an immense impact on the values held by people living in Alaska,» Lundquist wrote.

But the precise effect of pine bark beetle plagues on the nitrogen cycle and carbon cycle is highly variable, says a research group led by the University of Idaho, who have used an ecosystem model to simulate outbreaks.

Climate disruption in California — including record high temperatures, ongoing drought, tree die off and bark beetle outbreaks — has increased the state's wildfire risk by extending wildfire seasons, expanding at risk areas, and increasing fire size.

Pine beetles are a natural part of the life cycle in Western forests, but this outbreak, under way for more than a decade in some areas, is by far the most extensive ever recorded.

Research published by Veblen and Clark University's Dominik Kulakowski in 2015 found that «the best available science indicates that outbreaks of bark beetles do not increase the risk of high - severity fires in lodgepole pine and spruce - fir forests of the Rocky Mountains.»

A 2009 study looked at conifer forests in the San Bernardino Mountains in Southern California after significant tree mortality, stemming from a pine beetle outbreak in 2002, was followed by fires in subsequent years.

These effects are utterly swamped by the recent mortality due to bark beetle outbreaks, in which mortality rates are vastly higher, and over a vastly larger area.

In one case, an unprecedented loss of trees triggered by the pine beetle outbreak in western North America has decreased the net carbon balance on a scale comparable to British Columbia's current fossil fuel emissions

Area burned in the western United States is unaffected by recent mountain pine beetle outbreaks.

Because natural fire regimes varied widely historically, and are complicated in many places by similar variability in logging practices and intensities, the effect of fire reductions on bark beetle outbreaks varies considerably and involves several issues of spatial and temporal scale variability.

Here I'll try to give background on the issues related to bark beetle outbreaks, working from proximate to ultimate causes, and focusing on the one beetle species currently doing by far the most damage, the mountain pine beetle (MPB), Dendroctonus ponderosae.

The resulting increased competition, without any increased climate stresses, would by itself increase tree physiological stress and affect beetle outbreak dynamics.