Posted on July 12, 2015 by Bob Berwyn
‘Today we know these frogs are a key part of healthy mountain lake ecosystems …’
A Sierra Nevada yellow-legged frog. Photo courtesy National Park Service.
FRISCO — National Park Service biologists say a targeted restoration effort in Yosemite could rebuild populations of endangered yellow-legged frogs
back to self-sustaining levels within 10 years.
Yellow-legged frogs were once the most common frog in mountain lakes throughout the Sierra Nevada, but in recent decades were nearly wiped out by non-native species and by disease. By 2005, biologists could only find 11 widely scattered populations, with perhaps a couple of thousand frogs total. Continue reading
Filed under: biodiversity, endangered species, Environment, invasive species | Tagged: amphibian decline, amphibian restoration, endangered species, Environment, Sierra Nevada yellow-legged frogs, wildlife, Yosemite National Park | Leave a comment »
Posted on June 25, 2015 by Bob Berwyn
Aspen ecology, boreal toad presentation coming up
Rocky Mountain National Park from Trail Ridge Road. @bberwyn photo.
FRISCO — National Parks aren’t just places to spend a great vacation. Because they’re relatively untouched by development, they also serve as living laboratories where scientists can study plants and animals in an undisturbed setting.
Researchers who have specialized in understanding Rocky Mountain ecosystems will be sharing their expertise as part of Rocky Mountain National Park’s centennial Science Behind The Scenery Programs in the next few weeks every Thursday evening (7:30 p.m.) at the Beaver Meadows visitor center. The talks are free and open to the public. Continue reading
Filed under: biodiversity, Environment, forests, global amphibian decline, invasive species, national parks | Tagged: aspen ecology, boreal toads, Environment, forests, public lands, Rocky Mountain National Park | Leave a comment »
Posted on April 16, 2015 by Bob Berwyn
Red lionfish are swarming the western Atlantic and Caribbean. Photo courtesy USGS.
New data may help control efforts
FRISCO— Biologists and resource managers grappling with invasive red lionfish in the Caribbean have some new clues based on genetic research.
Without natural predators, lionfish have spread throughout the western Atlantic, displacing native fish and disrupting ecosystems.
In a new study released this week, U.S. Geological Survey researchers say the invasion probably started in multiple locations. Florida had been fingered as the likely source, but the analysis suggest that multiple introductions occurred, with some potentially coming from the more southern parts of the range. Continue reading
Filed under: biodiversity, Environment, invasive species | Tagged: Caribbean, Environment, invasive species, lionfish, oceans, red lionfish | Leave a comment »
Posted on March 5, 2015 by Bob Berwyn
New waterway could take a huge environmental toll
Preparations have started for construction of a new canal connecting the Atlantic and Pacific Ocean across Nicaragua. Map courtesy Pedro Alvarez Grou.
FRISCO — Expediting construction of a planned transoceanic canal in Nicaragua raises a host of environmental and social issues, according to a panel of scientists who recently met at a conference to discuss the potential impacts of the project.
The scientists urged caution and international collaboration, saying that sediment discharges during construction will threaten aquatic species, Nicaragua’s lucrative ecotourism and the supply of fresh water for drinking, irrigation and power generation.
The Nicaragua Interoceanic Grand Canal will cut through Lake Cocibolca , Central America’s main freshwater reservoir and the largest tropical freshwater lake of the Americas. The plan will force the relocation of indigenous populations and impact a fragile ecosystem, including species at risk of extinction, according to Rice University environmental engineer Pedro Alvarez and other members of the consortium. Continue reading
Filed under: biodiversity, Environment, invasive species | Tagged: Central America, Environment, Nicaragua Interoceanic Grand Canal, water | Leave a comment »
Posted on December 15, 2014 by Bob Berwyn
Meadow Creek wetlands, Frisco, Colorado.
‘Death by a thousand cuts’
FRISCO — Invasive wetlands species are likely to get a boost from climate change, resulting in long-term threats to key native ecosystems, according to new research from Duke University.
“Changing surface-water temperatures, rainfall patterns and river flows will likely give Japanese knotweed, hydrilla, honeysuckle, privet and other noxious invasive species an edge over less adaptable native species,” said Neal E. Flanagan, visiting assistant professor at the Duke Wetland Center, who led the research. Continue reading
Filed under: climate and weather, Environment, global warming, invasive species, wetlands | Tagged: climate chane, Environment, global warming, invasive species, wetlands | Leave a comment »
Posted on November 25, 2014 by Bob Berwyn
New research suggests that honeybee parasites spread faster as the Earth heats up. bberwyn photo.
Study tracks spread of invasive parasite
FRISCO —Global warming is very likely speeding up the spread of an invasive parasite that threatens honeybees in the UK, according to scientists with Queen’s University Belfast.
After studying the gut parasite Nosema ceranae, the scientists said its numbers could increase with climate change because its better able to adapt to warmer temperatures.
The parasite is native to Asia but has spread worldwide and is likely to cause increasing damage to bees as the Earth heats up. The findings were published this week in the journal Proceedings of the Royal Society B.
“This emerging parasite is more susceptible to cold than its original close relative, possibly reflecting its presumed origin in east Asia,” said Queen’s School of Biological Sciences Professor Robert Paxton. “In the face of rising global temperatures, our findings suggest that it will increase in prevalence and potentially lead to increased honey bee colony losses in Britain.” Continue reading
Filed under: biodiversity, climate and weather, Environment, global warming, invasive species | Tagged: climate change, Environment, global warming, honeybee decline, honeybee parasites, honeybees, pollinators | 1 Comment »