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Climate patterns as predictors of amphibians species richness and indicators of potential stress

June 16, 2010

Amphibians occupy a range of habitats throughout the world, but species richness is greatest in regions with moist, warm climates. We modeled the statistical relations of anuran and urodele species richness with mean annual climate for the conterminous United States, and compared the strength of these relations at national and regional levels. Model variables were calculated for county and subcounty mapping units, and included 40-year (1960-1999) annual mean and mean annual climate statistics, mapping unit average elevation, mapping unit land area, and estimates of anuran and urodele species richness. Climate data were derived from more than 7,500 first-order and cooperative meteorological stations and were interpolated to the mapping units using multiple linear regression models. Anuran and urodele species richness were calculated from the United States Geological Survey's Amphibian Research and Monitoring Initiative (ARMI) National Atlas for Amphibian Distributions. The national multivariate linear regression (MLR) model of anuran species richness had an adjusted coefficient of determination (R2) value of 0.64 and the national MLR model for urodele species richness had an R2 value of 0.45. Stratifying the United States by coarse-resolution ecological regions provided models for anUrans that ranged in R2 values from 0.15 to 0.78. Regional models for urodeles had R2 values. ranging from 0.27 to 0.74. In general, regional models for anurans were more strongly influenced by temperature variables, whereas precipitation variables had a larger influence on urodele models.

Citation Information

Publication Year 2005
Title Climate patterns as predictors of amphibians species richness and indicators of potential stress
Authors W. Battaglin, L. Hay, G. McCabe, P. Nanjappa, Alisa L. Gallant
Publication Type Article
Publication Subtype Journal Article
Series Title Alytes
Index ID 5224457
Record Source USGS Publications Warehouse
USGS Organization Earth Resources Observation and Science (EROS) Center; Patuxent Wildlife Research Center; Toxic Substances Hydrology Program

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