Study Is First To Chart Amphibian Populations' Decline In U.S. | WAMU 88.5 - American University Radio

NPR : News

Study Is First To Chart Amphibian Populations' Decline In U.S.

Populations of frogs, salamanders and other amphibians are declining at an average rate of 3.7 percent each year, according to a U.S. Geological Survey study released this week. Researchers say the study is the first to calculate how quickly amphibians are disappearing in the United States.

"If the rate observed is representative and remains unchanged, these species would disappear from half of the habitats they currently occupy in about 20 years," according to the USGS.

The negative findings held true in regions around the country, including on federally protected lands such as national parks.

To conduct the study, geologists analyzed reports of the presence of 48 species of amphibians at ponds and other habitats that were monitored between 2002 and 2011. The sampling data came from 34 different sites. The results were published in the journal PLOS One.

While the average decline was estimated at 3.7 percent, the study found that for species on the International Union for Conservation of Nature's "red list," the news was even worse, with an 11.6 annual decline.

Amphibian species that had been seen as robust, capable of sustaining themselves amid global declines that have concerned scientists since the 1980s, were found to dwindle at a rate of 2.7 percent each year, a finding the researchers called "alarming."

"Overall, the trends we documented suggest that amphibian declines may be more widespread and severe than previously thought," the geologists wrote.

The data collected did not include possible causes of the declines. In their report, the scientists write that possible factors include climate change, disease, and drought. They also noted that the study covered a comparatively short period of time.

"Amphibians have been a constant presence in our planet's ponds, streams, lakes and rivers for 350 million years or so, surviving countless changes that caused many other groups of animals to go extinct," says USGS Director Suzette Kimball. "This is why the findings of this study are so noteworthy; they demonstrate that the pressures amphibians now face exceed the ability of many of these survivors to cope."

Copyright 2013 NPR. To see more, visit http://www.npr.org/.

NPR

Edison's Talking Dolls Can Now Provide The Soundtrack To Your Nightmares

Thomas Edison built and sold about 500 dolls back in 1890. Now, new technology has made hearing their supercreepy voices possible for the first time in decades. (Thanks, technology.)
NPR

Tea Tuesdays: Butter Up That Tea, Tibetan-Style

Yak butter tea is often referred to as the national drink of Tibet. It's been consumed in the Himalayas for centuries and helped inspire the Bulletproof Coffee craze in the U.S.
NPR

Clinton 'War Room' Pushback And The 'Invent Your Own' Media Campaign

The Clinton campaign went into overdrive Tuesday trying to minimize the damage from a new book that delves into Clinton Foundation fundraising — and it's not using the typical channels to do so.
NPR

Edison's Talking Dolls Can Now Provide The Soundtrack To Your Nightmares

Thomas Edison built and sold about 500 dolls back in 1890. Now, new technology has made hearing their supercreepy voices possible for the first time in decades. (Thanks, technology.)

Leave a Comment

Help keep the conversation civil. Please refer to our Terms of Use and Code of Conduct before posting your comments.