Posted on August 11, 2014 by Bob Berwyn
Careful measurements show how roads and other disturbances affect moisture and the ability of fungi and bacteria to break down dead wood
Forest fragmentation has a big impact on the carbon cycle. bberwyn photo.
By Summit Voice
FRISCO —Logging roads, clearcuts and other disturbances that fragment forests can slow the decay of dead wood and significantly alter the cycling of carbon and nutrients in woodland ecosystems, according to a new study.
Scientists with Earthwatch and the University of Exeter (UK) took a hard look at global forest fragmentation, starting the well-known fact that the edge effect influences temperature, moisture and other elements of forest microclimates. But the effect on the carbon cycle is less understood, so the researchers used on-the-ground experiments combined with modeling to try and fill the gaps. Continue reading
Filed under: Colorado, Environment, Forest health, forests | Tagged: carbon cycle, edge effect, Environment, Forest health, forests | Leave a comment »
Posted on June 13, 2014 by Bob Berwyn
From flood to flames: Western Colorado under Red Flag warning; wildfire danger highest in far west and Southwest
Wildfire potential for July 2014 courtesy NIFC.
By Summit Voice
FRISCO — It doesn’t take long to go from floods to fire in Colorado. Even with mountain streams still running high with runoff, weather experts say the fire danger is on the rise as June turns warm and windy. About a third of the state (mostly western Colorado) is under a Red Flag warning going into the weekend, with the National Weather Service warning that warm temps, low humidity and gusty winds will combine to raise the risk of wildfires.
Overall, the fire season outlook for Colorado is not as critical as the past few years, according to the National Interagency Fire Center, which is emphasizing the current fire danger in the far west and the Southwest, including big parts of Arizona and southwestern New Mexico. Continue reading
Filed under: Colorado, Environment, forest fires, forests | Tagged: Colorado, fire season outlook, forests, western wildfires, wildfire response, Wildfires | Leave a comment »
Posted on June 10, 2014 by Bob Berwyn
Some forests in the U.S. are greening up earlier than ever in a warming world. bberwyn photo.
Detailed Harvard research tracks changes in eastern forests
FRISCO — Forests in the eastern U.S. are greening up earlier than ever and staying green longer at the end of the growing season, Harvard scientists conclude in a new study.
Thanks to the extended growing season, the trees are storing more carbon dioxide, but there’s no guarantee that beneficial side effect will persist into the future, the researchers said, explaining that changing precipitation patterns could disrupt forests in other ways. Continue reading
Filed under: climate and weather, Environment, forests | Tagged: climate change, Environment, forests, global warming, growing season | Leave a comment »
Posted on May 26, 2014 by Bob Berwyn
Beetle-killed trees near Frisco, Colorado.
State Forest Service warns against transporting firewood
FRISCO — It may be a little like the Dutch boy putting his finger in the leaky dike, but Colorado Forest Service officials are warning that transporting firewood from place to place may increase the spread of invasive tree-killing bugs.
Moving firewood even short distances increases the risk to Colorado’s native forests and urban trees. With the 2013 detection of the highly destructive emerald ash borer in the City of Boulder, and ongoing bark beetle epidemics in the state’s mountain forests, the Colorado State Forest Service wants to be sure people are aware of the risks associated with moving firewood. Continue reading
Filed under: Colorado, Environment, Forest health, forests, pine beetles and wildfires | Tagged: Colorado, emerald ash borer, firewood, forests, insects, trees | 1 Comment »
Posted on March 17, 2014 by Bob Berwyn
State report details status of insect activities
Spruce beetles are widely active across the mountains of southern Colorado.
FRISCO — Windstorms, mild winters and drought are the key factors in the continued spread of spruce beetles, which have become the dominant change agent in Colorado forests the past few years.
According to the latest annual forest health report compiled by state forest experts, spruce beetles were active across 398,000 acres in 2013, affected more than triple the amount of acreage than mountain pine beetles. Continue reading
Filed under: Colorado, Environment, Forest health, forests, Summit County news | Tagged: Colorado, environments, forests, pine beetles, spruce beetles | Leave a comment »
Posted on March 13, 2014 by Bob Berwyn
Ecosystem breakdown more complex than just invasive species
Colorado mule deer. bberwyn photo.
By Summit Voice
FRISCO — Valiant weed warriors, who have made it their mission to try and eradicate non-native plants, may want to think about the bigger ecological picture as they plan their weekend weed pulls.
A new study led by the University of Pittsburgh’s Susan Kalisz suggests that, in some cases, invasive plants overwhelm native ecosystems because of an overpopulation of deer. The density of deer in the United States is about four to 10 times what it was prior to European settlement of North America. That density, Kalisz posits, is the main reason garlic mustard is crowding out native plants, such as trillium, which are preferred food for wild deer. Continue reading
Filed under: biodiversity, Environment, invasive species | Tagged: biodiversity, Environment, forests, invasive species | 1 Comment »
Posted on February 28, 2014 by Bob Berwyn
What’s the role of coniferous trees in regulating climate?
Fast growth of particles from pine tree fumes surprises researchers
By Summit Voice
FRISCO — Forests may play a much bigger role in global climate than previously believed. In addition to cycling carbon, it appears that gases wafting from conifers quickly form small particles that can reflect sunlight and promote cloud formation, according to a new study that looked at forest aerosols at the molecular level.
“In many forested regions, you can go and observe particles apparently form from thin air. They’re not emitted from anything, they just appear,” said Joel Thornton, a University of Washington associate professor of atmospheric sciences. Continue reading
Filed under: climate and weather, Environment, forests | Tagged: aerosols, atmospheric science, climate, forests, global warming | 1 Comment »