Many amphibian species will become extinct across large portions of the U.S.

A new study led by scientists with the U.S. Geological Survey confirms the ongoing decline of amphibians around the world. The latest analysis suggests amphibian populations are declining at a rate of 3.79 percent per year. The negative effects of pesticide use are especially pronounced east of the Colorado River. Should such a decline continue, many amphibian species will become extinct across large portions of the U.S. “Losing 3 or 4 percent of amphibian populations might not sound like a big deal but small losses year in and year out quickly lead to dramatic and consequential declines,” added study co-author Michael Adams, lead scientists with the USGS Amphibian Research and Monitoring Initiative.