Posted on April 26, 2013 by Bob Berwyn
Isoprene, a chemical emitted by trees interacts with manmade nitrogen oxides to create particulate pollution. Bob Berwyn photo.
Tree chemicals combine with nitrogen oxides to form potentially dangerous particulates
By Summit Voice
SUMMIT COUNTY — President Ronald Reagan might have been on to something when he infamously claimed that trees cause pollution. While he was widely ridiculed for his statement, scientists later confirmed that a certain chemical emitted by trees also contributes to the production of particulate matter in the atmosphere.
The chemical in question is isoprene, an abundant molecule in the air that protects leaves from oxygen damage and temperature fluctuations. But those chemical processes have not been well understood, so researchers at the University of North Carolina at Chapel Hill set out to look for answers. (more…)
Filed under: air quality, Environment, forests | Tagged: air pollution, Environment, isoprene, Nitrogen oxide, Particulates, Ronald Reagan, trees, University of North Carolina at Chapel Hill School of Public Health | Leave a Comment »
Posted on February 18, 2013 by Bob Berwyn
See the forest …
FRISCO —Interviewing scientists about forests and climate change the past few days made me realize how forest ecosystems are incredibly diverse and dynamic. We generally think of forests as this static thing that’s always there — something that we take for granted, but we’ve seen, in the past 10 years, how that isn’t really true. In just the blink of an eye (on a geological timescale) our forest landscapes were changed by a tiny bug, and they won’t be the same again in our lifetimes. Even though many people tend to see that as a catastrophe of sorts, the reality is that forests are always changing, just sometimes, they change faster than we expect. (more…)
Filed under: Environment, photography, forests, Morning photo, Colorado | Tagged: Environment, climate change, forest, trees, oaks, bristlecones, Impacts and Indicators | Leave a Comment »
Posted on December 9, 2012 by Bob Berwyn
Global trend concerns leading ecologists
Ancient Colorado lodgepole pines have been killed by pine beetles, Bob Berwyn photo.
By Summit Voice
SUMMIT COUNTY — Colorado ‘s old lodgepoles aren’t the only forest giants that are dying. Around the world, the biggest, oldest trees that harbor and sustain countless birds and other wildlife, are meeting the same fate.
Three of the world’s leading ecologists say they’ve documented an alarming increase in the death rate of trees between 100 and 300 years old in many of the world’s forests, woodlands, savannahs, farming areas and even in cities.
“It’s a worldwide problem and appears to be happening in most types of forest,” said lead author Professor David Lindenmayer, of the ARC Centre of Excellence for Environmental Decisions and Australian National University. (more…)
Filed under: Environment, global warming, forests, biodiversity, climate and weather | Tagged: forests, James Cook University, Australian National University, climate. global warming, trees | 1 Comment »