Data from: Limitations of climate data for inferring species boundaries: insights from speckled rattlesnakes

Jesse M. Meik, Jeffrey W. Streicher, A. Michelle Lawing, Oscar Flores-Villela & Matthew K. Fujita
Phenotypes, DNA, and measures of ecological differences are widely used in species delimitation. Although rarely defined in such studies, ecological divergence is almost always approximated using multivariate climatic data associated with sets of specimens (i.e., the “climatic niche”); the justification for this approach is that species-specific climatic envelopes act as surrogates for physiological tolerances. Using identical statistical procedures, we evaluated the usefulness and validity of the climate-as-proxy assumption by comparing performance of genetic (nDNA SNPs...
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