Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders

Tom Radomski, Shawn Kuchta & Kenneth Kozak
Aims: In many taxa, the latitudinal span of species’ geographic ranges is positively correlated with median latitude (i.e., a Rapoport effect). This is frequently explained as adaptation to contemporary climate, however, variability in postglacial range expansion among species could also explain this pattern. Here, we analyze geographic data for North American salamanders to test the causes of Rapoport effects. Location: Temperate North America Taxon: Salamanders (order Caudata) Methods: Using range maps, we tested for a...
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