U.S. Geological Survey scientists have completed one of the first experimental studies to explore links between climate change and invasive species, specifically how brook trout and brown trout interact with rising stream temperatures. They found that non-native browns limit the ability of brook trout to use warmer water temperatures, By contrast, removin of browns brook trouts’ reach into warmer waters.
New data to help inform tamarisk eradication and bird conservation efforts
New mapping by the U.S. Geological Survey may help resource managers in the southwestern U.S. figure out how they can bolster populations of the endangered southwestern willow flycatcher while at the same time trying to control an unwanted invasive plant that provides habitat for the tiny songbird.
The new report from the USGS provides detailed habitat information on the entire range of of the flycatcher, which breeds in lush, dense vegetation along rivers and streams from May through September. In 2013, the U.S. Fish and Wildlife Service designated 1,975 stream kilometers as critical flycatcher habitat, located in six states and 38 counties.
“The satellite model provides us with new capabilities to locate and monitor potential flycatcher habitat within individual watersheds and across its entire range” said James Hatten, Research Biogeographer with the USGS and the report’s author. “The satellite model also revealed how the quantity of flycatcher habitat is affected annually by drought conditions, with habitat declining in California from 2013 to 2015, while increasing in New Mexico and Texas.” Continue reading “Endangered and invasive species meet in the desert Southwest”→
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.
Conservation advocates call for more protective measures to protect bat populations
A bat-killing disease that has been spreading across the U.S. westward from the East Coast has now been found in the Far West. White-nose syndrome, which has devastated bat populations, was confirmed in a little brown bat near Noth Bend, in Washington State, according to the U.S. Fish and Wildlife Service.
‘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”→