Global warming to speed up forest die-offs

asdf

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’

Staff Report

*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

Environment: New Clean Water Rule finalized, but the fighting is not over

Runoff and rainstorms have combined to keep flows high in the Blue River.

A new EPA rule aims to define which streams and rivers are protected under the Clean Water Act.

Big loopholes for industry, farms will continue to threaten water quality

Staff Report

FRISCO — After years of wrangling, the EPA has finalized a new rule intended to define which streams are covered under the Clean Water Act. The debate goes back more than a decade to a pair of court rulings that called into question whether smaller tributaries and seasonal streams are subject to federal regulations.

Yesterday’s announcement probably won’t end the fighting — Republicans in Congress have launched a bitter attack on the rule at the behest of big polluters like industrial farms and factories, and some national conservation groups like the Waterkeeper Alliance say the new rule is too weak, and rolls back protection for some streams that were previously covered. Continue reading

Are Mt. Everest’s glaciers doomed by global warming?

‘The signal of future glacier change in the region is clear: continued mass loss from glaciers is likely’

Researchers taking measurements in the Mera Glacier region of the Dudh Kosi basin. Photo courtesy Patrick Wagnon.

Researchers taking measurements in the Mera Glacier region of the Dudh Kosi basin. Photo courtesy Patrick Wagnon.

Scientists are trying to pinpoint the impacts of global warming on Himalayan glaciers and regional water supplies. Photo courtesy Nasa Earth Observatory.

Scientists are trying to pinpoint the impacts of global warming on Himalayan glaciers and regional water supplies. Photo courtesy Nasa Earth Observatory.

Staff Report

FRISCO —In the worst-case global warming scenario, glaciers in the Mt. Everest region — the roof of the world — could shrink between 70 percent and 99 percent by 2100, scientists said this week, waring of dire downstream consequences for millions of people who rely on water from those ice fields.

“The signal of future glacier change in the region is clear: continued and possibly accelerated mass loss from glaciers is likely given the projected increase in temperatures,” said Joseph Shea, a glacier hydrologist at the International Centre for Integrated Mountain Development, Kathmandu, Nepal, and leader of the study. Continue reading

Study: Cultural shift and centralized planning helped Melbourne adapt to Australia’s Millennium Drought

sdfg

Australia’s blistering Millennium Drought spurred wholesale changes in water use.

Regional water czar directed coordinated drought response

By Bob Berwyn

FRISCO — Drought-prone cities and regions around the world can look to Melbourne, Australia to get an idea of what it takes to tackle water shortages during extended dry spells — and to prepare for future droughts, which are projected to become more frequent in some regions as global warming intensifies.

As the worst drought in Australia’s history took hold during the late 1990s, the city’s 4.3 million residents were able to cut their daily water use by half, to just 41 gallons per per person, according to a new study. Continue reading

How do changing forests affect bees?

Changes in southeastern forests may be contributing to the decline of bee populations, @bberwyn photo.

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

Sen. Bennet leads charge for sage-grouse conservation funding

The health of sage grouse populations is directly linked to that of the sagebrush landscape. More than 350 species rely on the sagebrush ecosystem including elk, mule deer and pronghorn’

sdfg

Can greater sage-grouse get some love from Congress?

Staff Report

FRISCO — In a bid to avoid an endangered species listing for greater sage-grouse, Colorado Sen. Michael Bennett led a group of fellow Democrats urging the Senate Appropriations Committee to fully fund an array of conservation measures by multiple federal land management agencies. Continue reading

Study shows link between air, water pollution

This Meadow Creek, a wild, free-flowing stream that starts in the Eagles Nest Wilderness Area and ends up flowing right past our house before its confluence with Dillon Reservoir, where it's wild no more.

Atmospheric emissions of hormone-disrupting chemicals found to pollute rivers and streams.

Hormone-disrupting toxins in Missouri streams traced to factory emissions

Staff Report

FRISCO — Scientists say atmospheric releases of hormone-disrupting chemicals may be a big source of of pollution in streams and lakes. After studying water quality near industrial sites permitted to release toxic chemicals into the air, the researchers said they found unexpectedly high levels of BPA in water around those factories.

“This finding suggests that atmospheric BPA releases may contaminate local surface water, leading to greater exposure of humans or wildlife,” said Don Tillitt, adjunct professor of biological sciences at MU, and biochemistry and physiology branch chief with the U.S. Geological Survey’s Columbia Environmental Research Center. Continue reading

Follow

Get every new post delivered to your Inbox.

Join 8,508 other followers