Posted on May 28, 2015 by Bob Berwyn
Taller trees, like this California redwood, are most susceptible to global warming impacts, a new study says. @bberwyn photo.
‘The warming climate is creating a threat to global forests unlike any in recorded history’
*More Summit Voice stories on forests and climate change here
FRISCO — Forest researchers have been seeing the warning signs for decades — global warming is speeding up tree deaths around the world.
The pace of those changes is likely to speed up, according to scientists at Los Alamos National Laboratory.
“The warming climate is creating a threat to global forests unlike any in recorded history,” said Nathan McDowell, of Los Alamos’ Earth and Environmental Sciences Division. “Forests store the majority of terrestrial carbon and their loss may have significant and sustained impacts on the global carbon cycle.” Continue reading
Filed under: climate and weather, climate change, Environment, forests, global warming | Tagged: climate change, climate change impacts, Environment, forest mortality, forests, global warming, Los Alamos National Laboratory | 2 Comments »
Posted on May 27, 2015 by Bob Berwyn
Changes in southeastern forests may be contributing to the decline of bee populations, @bberwyn photo.
Forest Service study helps unravel pollinator decline mystery Staff Report FRISCO — U.S. Forest Service scientists say they’ve solved another part of the biological puzzle surrounding the alarming decline of bee populations. Changes in forest structure from open to closed canopies are likely contributing to the decline, especially of native bees, at least in some regions. “Bees prefer open forests,” said Jim Hanula, a research entomologist at the U.S. Forest Service Southern Research Station. “We found that total tree basal area was the best predictor for how many bees would be present.” Continue reading
Filed under: biodiversity, Environment, US Forest Service | Tagged: biodiversity, Environment, forests, honeybee decline, pollinators | Leave a comment »
Posted on April 27, 2015 by Bob Berwyn
Proposed logging on thousands of acres of national forest lands near Leadville, Colorado could threaten important denning and feeding areas used by threatened lynx.
Conservation advocates go to court to block Tennessee Pas project
FRISCO — The threat of widespread logging in an area where lynx are slowly reestablishing a Colorado presence has spurred a new lawsuit by forest conservation advocates.
The recently approved 10-year project is in the Tennessee Pass area, mostly on lands managed by the Leadville Ranger District of the San Isabel National Forest.
The Forest Service green light potentially permits logging across more 12,000 acres, including 2,370 acres of clear cutting and 6,765 acres of commercial thinning and construction of 20 miles of temporary roads.
The scenery, historic status and wildlife of the Tennessee Pass area are all at risk, said Kevin Mueller, WildEarth Guardians Utah-Southern Rockies Conservation Manager.
“If this forest service logging proposal is approved, a patchwork of clear cuts could be visible on all sides of the Turquoise Lake Basin,” Mueller said. “This litigation centers on USFS refusal to protect forested slopes known to represent critical den habitat for threatened lynx,” said attorney John Mellgren of the Western Environmental Law Center. “Our goal is ecologically resilient forests that support healthy wildlife and lynx populations. Clear-cutting would further undermine lynx and other vulnerable species,” Mellgren said. Continue reading
Filed under: biodiversity, Colorado, endangered species, Environment | Tagged: Colorado, endangered species, environement, forests, logging, lynx | 1 Comment »
Posted on April 6, 2015 by Bob Berwyn
Study shows regional variations in forest health equation
Annual aerial survey enable resource managers to map the spread of tree-killing bugs.
FRISCO — Warming winters across the western U.S. have had a nuanced effect on the severity of mountain pine beetle outbreaks, researchers said last week.
The absence of lengthy bug-killing cold snaps in some areas has helped fuel the growth of insect populations,, but milder winters can’t be blamed for the full extent of recent outbreaks in the region, according to a study by Dartmouth College and U.S. Forest Service. Continue reading
Filed under: climate and weather, Environment, forests, global warming, pine beetles and wildfires | Tagged: climate change, Forest health, forests, mountain pine beetles | 2 Comments »
Posted on March 24, 2015 by Bob Berwyn
New CU-Boulder study has implications for forest managers and Red Zone communities
*More Summit Voice stories on beetle-kill and forests here.
FRISCO — Communities and resource managers looking to address the threat of wildfires should focus less on tree-killing beetles and more on the underlying forces driving the trend toward larger fires.
Warmer temperatures and increased drought are the key factors, said Colorado-based researchers who took a close look at patterns of beetle-kill and wildfires in recent years.
Their study found that western forests killed by mountain pine beetles are no more at risk to burn than healthy forests. Those findings fly in the face of both public perception and policy, the scientists acknowledged.
“What we are seeing in this study is that at broad scales, fire does not necessarily follow mountain pine beetles,” said CU-Boulder Research Scientist Tania Schoennagel, of the Institute of Arctic and Alpine Research. “It’s well known, however, that fire does follow drought.” Continue reading
Filed under: climate and weather, climate change, Colorado, Environment, forest fires, Forest health, forests, global warming, pine beetles and wildfires | Tagged: beetle kill, climate change, drought, Forest health, forests, global warming, Wildfires | Leave a comment »
Posted on March 21, 2015 by Bob Berwyn
Continued Western drought, warmth set stage for significant wildfires later this summer
After a dry and warm winter, southern Alaska will have a better than average chance of signficant wildfire activity this spring. Map via NIFC.
By Bob Berwyn
Western wildfires have always been shape-shifting beasts, roaring to life wherever there is hot and dry weather, wind and fuel. But last year’s relatively cool and wet summer brought relief to parts of the region — including Colorado — that had been especially hard the previous few years.
The 2015 wildfire season is starting similarly slow to last year, according to statistics from the National Interagency Fire Center showing that, since January 1, there have been about 6,200 fires that burned across a 100,000 acre footprint, just 30 percent of the average from the past 10 years. Continue reading
Filed under: Environment, forest fires, forests, wildfires | Tagged: 2015 wildfire outlook, climate change, drought, Environment, forest fires, forests, Wildfires | Leave a comment »
Posted on March 5, 2015 by Bob Berwyn
Can forests evolve to survive global warming?
Research will inform forest planning efforts
FRISCO — Spanish scientists say they can use genetic data to help determine which pine trees are most vulnerable to climate change, and which trees might be able to thrive in a warmer world. Their findings, published in GENETICS, could help forestry managers decide where to focus reforestation efforts and guide the choice of tree stocks.
The study focused on maritime pines, which grows widely in southwestern Europe and parts of northern Africa. But the tree’s important economic value and ecological roles in the region may be at risk as the changing climate threatens the more vulnerable forests and the productivity of commercial plantations. Continue reading
Filed under: agriculture, climate and weather, forests, global warming | Tagged: climate change, forests, genetics, global warming, pine trees | 1 Comment »