Tag Archives: pine beetle

Pine Beetles Kill High Elevation Lodgepole Pines of Colorado

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"Pine Beetle Galleries" Photo Credit: slm

The pine beetle epidemic  has decimated 70 percent of the lodgepole pine trees in Colorado and has drastically changed the mountain ecosystems. Lodgepole pines are found at high elevations between 6,000 and 11,000 feet.

Here are a few articles that do a good job explaining what the pine beetle is and how it impacts trees:

But only a few articles took those results and applied them to the ecosystem and its impacts to Colorado residents.

The Rocky reported that this outbreak will have far reaching impacts on the states water supply because the dead trees will no longer be able to hold the soil in place. Rivers, lakes and streams could be come clogged as sediment washes down mountain sides.

Also nature lovers will need to be more careful about where they step as falling red-dried up trees are more likely.  This could impact Colorado’s tourism industry, much of which is focused on “getting outside.” Tourism is a big industry in the state. It accounts for some 140,000+ jobs across the state.

” Overnight visitors contribute $9.8 billion a year,” said Matt Cheroutes, Office of Economic Development and International Trade spokesman.

While some will argue that pine beetle outbreaks are a natural process, these outbreaks are pretty much unheard of in high alpine ecosystems because the cold temperatures freeze out the bugs. But, this time the bugs pushed up into higher latitudes and took advantage of the warmer than usual temperatures.

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"P1020493" Photo Credit:kjell

These giant trees can live for hundreds of years and look similar to ponderosa pines. Hiking in Indian Peak Wilderness I have seen Gray Jays and Mountain Chickadees hiding in their branches. If all trends continue these trees may not be seen in the Colorado mountains for a long time.

“We’re two to three years from seeing virtually the death of mature lodgepole pines,” said Jan Burke, a silviculturist for Colorado’s White River national forest.

“To the casual observer it will look like all of them. It’s wholesale mortality. It’s difficult to watch these really beautiful stands die. It just makes you want to go home.”

Future of Trees in the West Threatened Due to Climate Change

A new study shows that western trees in old growth forests are dying-off at an alarming rate due to climate change.These deaths were observed at different altitudes and in different trees from pines to hemlocks. Furthermore, trees are not growing back at a fast enough rate to replace the old growth tree loss.

"hdr tree" by Paulo Brandão's

"hdr tree" Photo Credit: Paulo Brandao

“The findings are consistent with other well documented, climate-induced ecological changes, including increased wildfire activity since the mid-1980s and bark beetle outbreaks that are occurring at unprecedented levels in western North America forests, including Alaska,” CU-Boulder geography Professor Thomas Veblen to Science Daily.

Researchers ruled out many things that could have contributed to climate change like fires. Trees in Colorado that were effected by the pine beetle outbreak were not used in the data set. The study found that temperatures most likely caused the die-offs.

“Average temperature in the West rose by more than 1° F over the last few decades,” said USGS researcher Phil van Mantgem to Science Daily. “While this may not sound like much, it has been enough to reduce winter snowpack, cause earlier snowmelt, and lengthen the summer drought.”

Trees are absorbing less Carbon Dioxide and tossing more greenhouse gas back into atmosphere, which is a recipe for a warmer globe and more ecological consequences for alpine environments.

ScienceDaily. Retrieved January 26, 2009, from http://www.sciencedaily.com­ /releases/2009/01/090122141222.htm

Photo Credit Link: http://www.flickr.com/photos/paulobrandao/

Update: More news about how old growth forest are dying out due to warmer temperatures can be found here: http://www.sciam.com/article.cfm?id=out-on-a-limb-global-warm