Posted on October 5, 2015 by Bob Berwyn
Himalayan balsam was introduced as an ornamental and quickly spread throughout the northern hemisphere where it’s considered an invasive plant that displaces native flora in some areas. Photo courtesy Royal Horticultural Society.
Swiss study tracks online sales of potential invaders
Online commerce is accelerating the invasive species threat worldwide, Swiss reasearchers said last week after taking a close look at at the unbridled market for buying and selling plants on the internet.
These days, all it takes is one click to spread potentially invasive plants from continent to continent – and unintentionally encouraging biological invasions, the researchers said, referring to invaders like goldenrod, Himalayan balsam and the Chinese windmill palm — all of which now threaten native biodiversity in the Alpine republic.
The assess the extent of the problem, ETH Zurich researchers monitoried online trades of about two-thirds of the world’s flora on eBay plus nine other online trading platforms for 50 days, tracking which plant species were offered for sale in various countries, and how often. Continue reading
Filed under: biodiversity, Environment, invasive species | Tagged: biodiversity, eBay, Environment, invasive species, online commerce | Leave a comment »
Posted on September 11, 2015 by Bob Berwyn
Wildfires are putting a bit hit on greater sage-grouse populations. Photo via USFWS.
Current wildfire trends could cut sage grouse populations dramatically
Slowing the spiral of growing wildfires may be crucial to protecting greater sage-grouse during the next 30 years, U.S. Geological Survey researchers said after comparing wildfire, precipitation and sage grouse population trends.
Cutting destructive fires near key habitat areas would be most beneficial and could even help sage grouse populations rebound, the scientists concluded.
The new study projects that, if the current trend in wildfire continues unabated, sage grouse populations will continue to plummet — by as much as half by the mid-1940s. The models used by the scientists simulated different post-fire recovery times for sagebrush habitats based on soil attributes — soil moisture and temperature maps — that strongly influence resilience to wildfire and resistance to invasive grass species. Continue reading
Filed under: biodiversity, climate and weather, climate change, endangered species, Environment, extreme weather, global warming, invasive species | Tagged: climate change, endangered species, Environment, Greater sage-grouse, wildfiires | Leave a comment »
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 »