Sentences with phrase «spruce beetle»

(The spruce beetle in Alaska may turn out to be a present - day example of the same sort of response.)

According to a study by the U.S. Forest Service and Colorado State Forest Survey, the spruce beetle epidemic has expanded due to a combination of factors, one of which is drought.

«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.

The new study is important because it shows that drought is a better predictor of spruce beetle outbreaks in northern Colorado than temperature alone, said lead study author Sarah Hart, a CU - Boulder doctoral student in geography.

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

The lack of correlation between spruce beetle infestation and severe fire damage suggests that factors such as topography and weather conditions play a larger role in determining the severity of Colorado's subalpine wildfires.

The study may have future implications for state land managers and policymakers, who must decide how best to devote resources to fire suppression and spruce beetle containment efforts.

Not so, according to a field study led by CU - Boulder researchers, who found that higher levels of spruce beetle infestation did not lead to more ecologically severe fires.

In 2014, spruce beetles infested more than 87,000 new acres in Colorado.

Drought conditions appear to decrease host tree defenses against spruce beetles, which attack the inner layers of bark, feeding and breeding in the phloem, a soft inner bark tissue, which impedes tree growth and eventually kills vast swaths of forest.

So, perhaps you can tell us how you feel about mountain pine & spruce beetles, given that it no longer gets cold enough, often enough to suppress them?

Not exact matches

«Our money is not in cutting trees,» Droń says as he pours a craft beer named after the bark beetle and brewed with spruce needles from Białowieża.

The latest battle began after spruce bark beetles began to kill drought - weakened trees in 2012.

The half - centimeter - long spruce bark beetles can kill a mature tree within months, especially one weakened by drought.

But they maintain that dead spruce should be left in place even in beetle - stricken plantations.

Nor should you, ecologists add: Bark beetle outbreaks should be allowed to happen as part of the forest's life cycle, and the dead spruces provide habitat for many species.

In 2016, Jan Szyszko, then the minister for the environment, approved a tripling of logging, saying that it was necessary to fight an outbreak of spruce bark beetles.

Sapped by attacks from an exotic aphid, a moth, and two species of bark beetles, the spruce - fir zone in the Pinalenos was scrofulous and drier than normal.

For example, maternity colonies of B. barbastellus were found beneath bark of beetle - killed spruces.

Meanwhile, as homes sink into the muddy, melting earth, insects such as the spruce bark beetle, whose numbers were once kept in check by cold weather, have been decimating forests.

For example, last year, a team of Colorado researchers found no correlation between beetles and fire severity in the case of high - elevation spruce and fir forests in southwestern Colorado (ClimateWire, Nov. 2, 2015).

Published in the journal Environmental Research Letters today, the study looked at both mountain pine beetle and western spruce budworm outbreaks and unpacked the interaction between insect activity and fire severity.

In the 1990s, a series of warm winters and summers in south - central Alaska allowed bark beetle populations to explode and kill millions of old spruce trees.

PORTLAND, Ore. — A new paper published today in the Natural Areas Journal indicates that bark beetle outbreaks that have turned millions of acres of forests in the Inter-mountain West a noticeable red coloration (from tree death) do not substantially increase the risk of active crown fire in lodgepole pine and spruce forests as commonly assumed.

Native spruce bark beetles have girdled and killed a majority of the evergreen spruce trees at Brooks Camp, and when they fall over, their roots carry up with them a thick layer of ash.

This drying effect is also demonstrated well in our local spruce bark beetle outbreaks.

The beetles normally are present in low numbers in Alaska forests, but in the 1990s they exploded across the Kenai Peninsula, turning nearly 5 million acres of big spruce trees red and then ghostly gray.

spruce bark beetles is killing trees across Southcentral Alaska, as far north as the Alaska Range, fulfilling a prediction by a pioneering Alaska climate change biologist.

Climate change also causes indirect impacts on plants via outbreaks of pests such as pine bark (Kurz et al., 2008) and spruce bark beetles (National Climate Assessment and Development Advisory Committee, 2013; Bentz et al., 2010).

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.»

Spruce and pine bark beetles have recently infested vast areas of forest in North America, killing huge numbers of trees.