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Trends in amphibian occupancy in the United States

May 23, 2013

Though a third of amphibian species worldwide are thought to be imperiled, existing assessments simply categorize extinction risk, providing little information on the rate of population losses. We conducted the first analysis of the rate of change in the probability that amphibians occupy ponds and other comparable habitat features across the United States. We found that overall occupancy by amphibians declined 3.7% annually from 2002 to 2011. Species that are Red-listed by the International Union for Conservation of Nature (IUCN) declined an average of 11.6% annually. All subsets of data examined had a declining trend including species in the IUCN Least Concern category. This analysis suggests that amphibian declines may be more widespread and severe than previously realized.

Publication Year 2013
Title Trends in amphibian occupancy in the United States
DOI 10.1371/journal.pone.0064347
Authors M. J. Adams, David A.W. Miller, Erin Muths, Paul Stephen Corn, Evan H. Campbell Grant, Larissa L. Bailey, Gary M. Fellers, Robert N. Fisher, Walter J. Sadinski, Hardin Waddle, Susan C. Walls
Publication Type Article
Publication Subtype Journal Article
Series Title PLoS ONE
Index ID 70046074
Record Source USGS Publications Warehouse
USGS Organization Forest and Rangeland Ecosystem Science Center