Posted on October 21, 2014 by Bob Berwyn
A new study finds that human disturbance drives forest changes in eastern U.S. bberwyn photo
Fire suppression, land-clearing outweigh climate factors, study says
FRISCO — Climate change may only be a secondary factor in the changing composition of Eastern forests. Changes in disturbance regimes have had a much bigger impact in the past century or so, according to Marc Abrams, a researcher in Penn State’s College of Agricultural Sciences.
Abrams says eastern forests are still in a state of disequilibrium resulting from massive clear-cutting and burning during the late 1800s and early 1900s, and aggressive forest fire suppression has also had a far greater influence on shifts in dominant tree species than minor differences in temperature. Continue reading
Filed under: climate and weather, Environment, Forest health, forests, global warming | Tagged: climate change, Forest health, forests, global warming | 1 Comment »
Posted on September 10, 2014 by Bob Berwyn
Smoke from forest fires in Greece streams out across the Mediterranean Sea. GIF composite image via NASA and Wikipedia.
Study projects 200 percent increase in burned areas by 2090 without mitigation and adaptation
FRISCO —The American West isn’t alone in facing an increased wildfire threat. Global warming is expected to result in a sharp increase in European forest fires during the coming decades. By 2090, areas burned by fires could increase by as much as 200 percent, according to a new study published in the journal Regional Environmental Change.
Warmer temperatures and longer droughts will combine to fuel forest fire conditions in areas that are already susceptible, particularly the Mediterranean region, the researchers said, suggesting that better forest management, including preventive fires, could keep the increase to less than 50 percent. Continue reading
Filed under: climate and weather, Environment, forest fires, forests, global warming | Tagged: climate change, Europe, Forest health, forests, global warming, IIASA, Wildfires | Leave a comment »
Posted on September 5, 2014 by Bob Berwyn
Spruce beetle populations are surging in the southern Rocky Mountains.
Conservation advocates say more protection needed to protect critical ecosystem services
FRISCO — Forest degradation continues unchecked in many parts of the world and especially in the northern hemisphere boreal forest belt in Canada, Russia and Alaska, conservation advocates said this week, unveiling new maps showing forest impacts across more than 100 million hectares — an are three times the size of Germany.
Just since 2000, about 8 percent of the world’s remaining intact forest landscapes have been subject to some type of degradation from human activities, including logging and energy development.
The Greenpeace GIS Laboratory, the University of Maryland and Transparent World, in collaboration with the World Resources Institute and WWF-Russia, used satellite technology to determine the location and extent of the world’s last remaining large undisturbed forests, important harbors for biodiversity that are still unaffected by logging and infrastructure such as roads, mining and oil or gas development. Continue reading
Filed under: biodiversity, Environment, Forest health, forests | Tagged: Environment, forest fragmentation, Forest health, forests, global carbon cycle | Leave a comment »
Posted on September 2, 2014 by Bob Berwyn
New inventory assesses state’s woodland resources
FRISCO — Mortality is increasing and growth is slowing down in New Mexico’s forest lands, according to a new forest inventory released in late August. The only species showing overall growth are ponderosa and piñon pines, as well as junipers, as insects, wildfires drought and disease take an increasing toll on the state’s woodlands.
Forests grow on about 25 million acres in New Mexico, with 44 percent on private lands and 31 percent on national forest lands. About 40 percent (10.8 million acres) of the forests are piñon-juniper woodlands, by far the state’s most extensive forest type. Gambel oak is the most abundant tree species by number of trees, and ponderosa pine is the most abundant by volume or biomass. Overall, researchers estimate there are more than 6 billion live trees growing in the state.
The inventory documented the drought-induced piñon pine die-off in the early 2000s, estimating that about 8 percent the species died, but noted that the mortality rate has tapered off.New Mexico’s aspen forests, covering about 380,000 acres, held steady in the past decade. Continue reading
Filed under: climate and weather, Drought, Environment, forest fires, Forest health, forests, pine beetles and wildfires | Tagged: climate, drought, Environment, Forest health, Forest Service, forests, New Mexico, piñon-juniper forests | Leave a comment »
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 »