|
The colorful Yosemite toad was once one of the most common high-elevation Sierra amphibians. Active for only four to five months per year, it has just a short time in which to reproduce and eat enough to survive the long season of hibernation under the snow. The number of Yosemite toads has now declined precipitously throughout the Sierra Nevada, particularly in Yosemite National Park , where the toad was first discovered and after which it is named.
ENDANGERED SPECIES ACT PROFILE
PROTECTION STATUS: Not listed; candidate species
PETITIONED: 2000
YEAR PLACED ON LIST: Candidate 2002
RANGE: The central Sierra Nevada of California, from Alpine County to Fresno County
THREATS: Introduced fish, pesticides and other airborne chemical pollutants, increased ultraviolet radiation from ozone depletion, cattle grazing, pathogens, and drought
POPULATION TREND: The Yosemite toad was historically abundant in the high country of the central Sierra Nevada, but by the early 1990s had been eliminated from about 50 to 69 percent of known historical sites. Many known large populations of toads have recently crashed by up to 99 percent or disappeared completely. Declines of the toad have been especially alarming in Yosemite National Park, with recent studies at Tioga Pass documenting wholesale population crashes.
|
SAVING THE yOSEMITE TOAD
After entire populations of Yosemite toads were seen to have collapsed — even in Yosemite National Park, thought to be the species' most pristine and protected stronghold — the Center petitioned for Endangered Species Act protection for this vanishing high-elevation amphibian. Unfortunately, the U.S. Fish and Wildlife Service has refused to protect the species, instead designating it as merely a candidate for listing. The Center is working to gain full Endangered Species Act protection for the toad.
The Yosemite toad is susceptible to pesticides that drift from the Central Valley into the high Sierras, which act as environmental stressors that render amphibians more susceptible to aquatic pathogens. Through our Pesticides Reduction Campaign, the Center is working to reduce pesticide use and force the Environmental Protection Agency to protect endangered species from toxic pesticides.
ACTION TIMELINE
+ CAMPAIGN LINKS
NATURAL HISTORY
+ MEDIA
+ DETRITUS
Contact: Jeff Miller
|
