Non-native predators could threaten endangered species in Colorado River
Colorado wildlife managers will try to curb expansion of non-native northern pike in Summit County’s Green Mountain Reservoir by paying anglers a $20 bounty for each fish they deliver to the Heeney Marina.
The illegally introduced fish are taking a toll on trout in the reservoir north of Silverthorne and could escape to the Blue River and make their way to the Colorado River. That could add to the challenges of trying to recover four endangered native Colorado River fish species, according to Colorado Parks and Wildlife.
Scientists say Nile crocs may be thriving in Sunshine State swamps
The latest non-native species to invade Florida’s subtropical clime is a man-eater, according to University of Florida researchers who say they’ve genetically identified Nile crocodiles living in the swamps of the Sunshine State.
The aquatic reptiles can grow as long as 18 feet and weigh as much as a small car, and in their native habitat eat everything from hippos and zebras to humans. In Florida, they could eat native birds, fish and mammals, as well as the state’s native crocodile and alligators, said the researchers, have confirmed the capture of multiple Nile crocodiles in the wild, using DNA analysis.
‘Snakes may not be everyone’s favorite animal, but they are undeniably important in a well-balanced ecosystem’
A rapidly spreading fungal disease that’s killing some snake species at an alarming rate has now been found in in Louisiana for the first time, according to a new study by U.S. Geological Survey scientists. Snake fungal disease now has been confirmed in at least 16 states in the Eastern and Midwestern United States.
Early detection and response, partnerships across jurisdictions seen as critical measures
The spread of invasive species has been identified as the second-leading cause of extinctions among all plants and animals worldwide — and the problem is getting worse in the era of global trade. Just a few months ago, scientists warned that North American amphibians are at risk from an invasive fungus. White-nose syndrome, which has wiped out millions of bats, may have also spread to the U.S. from Europe.
“Invasive species pose one of the most significant ecological threats to America’s lands and waters,” said U.S. Department of the Interior Principal Deputy Assistant Secretary Kristen J. Sarri. “Early detection and rapid response actions can reduce the long-term costs, economic burden, and ecological harm that they have on communities. Strong partnerships and a shared commitment to preventing the spread of invasive species can lay the foundation for more effective and cost-efficient strategies to stop their spread.” Continue reading “Feds outline plan to curb invasive species”→
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.
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 “Getting a handle on wildfires may be key to saving greater sage-grouse”→