Posted on January 23, 2015 by Bob Berwyn
Oaks, stands of dense, small trees becoming dominant
FRISCO — Hand-written notes from old forest surveys have helped scientists track long-term changes in California forests, including a decline of large trees of up to 50 percent in the Sierra Nevada highlands, the south and central coast ranges and Northern California.
The research team from the University of California, Berkeley, UC Davis and the U.S. Geological Survey compared unique forest surveys collected by UC Berkeley alumnus Albert Wieslander in the 1920s and ’30s with recent U.S. Forest Service data to show that the decline of large trees and increase in the density of smaller trees is not unique to the state’s mountains. Continue reading
Filed under: climate and weather, Environment, Forest health, forests, global warming | Tagged: California, climate change, Environment, forests, Old-growth forest | 2 Comments »
Posted on December 15, 2014 by Bob Berwyn
Can mushrooms help save whitebark pines? Photo courtesy U.S. Forest Service.
Scientists report success in treating seedlings with mushroom spores
FRISCO — High-elevation whitebark pines are under the gun in the northern Rockies. White pine blister rust, an invasive fungus, and pine beetles have combined to drive the species toward extinction.
But scientists trying to recover the species say that a humble mushroom could help their efforts. A three-year experiment shows a 10 to 15 percent increase in the survival rate of whitebark pine seedlings when Siberian slippery jack spores are injected into the soil around them. The injection takes place in nurseries before the seedlings are transplanted in the mountains. Continue reading
Filed under: endangered species, Environment, Forest health, forests, Uncategorized | Tagged: Environment, Forest health, forests, fungi, pine beetles, whitebark pines | Leave a comment »
Posted on December 3, 2014 by Bob Berwyn
Findings challenge carbon-balance assumptions of woody biomass energy boosters
A forest health logging site on Swan Mountain near Dillon, Colorado. bberwyn photo.
FRISCO — Logging forests may have a more significant impact on carbon storage in soils than previously believed, Dartmouth College researchers found after taking a close look at at how timber harvesting affects mineral soil carbon over 100 years.
The study found that, while logging doesn’t immediately release carbon stored in a forest’s mineral soils into the atmosphere, it triggers a gradual release that may contribute to climate change over decades. Continue reading
Filed under: agriculture, climate and weather, Environment, Forest health, forests, global warming, US Forest Service | Tagged: carbon cycle, Environment, Forest health, forests, global warming, logging, soil carbon storage | 2 Comments »
Posted on November 13, 2014 by Bob Berwyn
Study examines nexus of forest, tourism policies
FRISCO — It may be Shangri-La no more if centralized government policies from Beijing continue to supplant community based management schemes for the incredibly diverse temperate forests of China’s northwest Yunnan Province.
Dartmouth scientists found in a recent study that China’s anti-logging, conservation and ecotourism policies are accelerating the loss of old-growth forests in the region, which symbolizes the tensions associated with China’s economic transformation. Continue reading
Filed under: biodiversity, Environment, forests | Tagged: China, Environment, forests, Shangri-la, Tourism, Yunnan Province | Leave a comment »
Posted on November 4, 2014 by Bob Berwyn
Spruce beetle populations are surging in the southern Rocky Mountains. bberwyn photo.
Study calls out inaccurate media reports about links between bugs and wildfires
By Bob Berwyn
FRISCO — Dire warnings about how beetle outbreaks make forests more prone to fires are ringing increasingly hollow, as more and more forest research shows that other factors — especially weather — are more important drivers. In some cases, defoliation by bugs may actually lessen the the threat of disastrous crown fires.
In one of the latest studies, researchers with the University of Oregon and the U.S. Forest Service took a close look at the relationship between fires and spruce budworm infestations in the Pacific Northwest. They found that defoliation reduces both torching and crowning potential. Continue reading
Filed under: Colorado, Environment, forest fires, Forest health, forests | Tagged: crown fires, Forest health, forests, western spruce budworm, Wildfires | Leave a comment »
Posted on October 25, 2014 by Bob Berwyn
Evening glow showing in the clouds over the Tenmile Range, near Frisco, Colorado.
The Gore Range.
Revisiting a favorite patch of colorful aspens near Frisco, Colorado.
Intense yellow aspens at the peak of the fall color season.
An autumn rainbow accents the sky above groves of colorful aspens in Summit County, Colorado.
FRISCO — With a few thousand new autumn photos in the files, it’s time, in this in between season, to go back and start focusing on the very best shots of the season. There’s no question in my mind that the best images are from the days when the sky wasn’t just a passive blue bystander, but an active participant in the show, will billowing gray clouds acting as a perfect foil to the incredible brilliance of changing aspen leaves. And a few times we even enjoyed autumn rainbows as a bonus to the season. Follow our Instagram feed for daily photo updates and visit our online gallery for a great selection of Colorado landscape and nature images, available as fine art prints and greeting cards
Filed under: Colorado, Morning photo, photography, Summit County Colorado, Summit County snow and weather | Tagged: aspens, autumn, Colorado, forests, photography, seasons | 1 Comment »
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 »