“…Historic events are more clearly reflected in sequence variation of mitochondrial DNA (mtDNA) or standard nuclear genes as they indicate the origin of the populations going back to the glacial periods and their colonization routes to the present habitats (e.g., Hewitt, ; Seddon, Santucci, Reeve, & Hewitt, ; Stauffer, Lakatos, & Hewitt, ; Taberlet, Fumagalli, Wust‐Saucy, & Cosson, ). At the same time, different nuclear marker loci (e.g., allozymes or microsatellites) usually show higher variation than standard genes, and thus they provide finer resolution to study the effect of recent past processes such as drift or selection (e.g., Besold, Schmitt, Tammaru, & Cassel‐Lundhagen, ; Karl, Schmitt, & Fischer, ; Pecsenye, Bereczki, Juhász, Tartally, & Varga, ). Finally, phenotypic variation (e.g., morphometric variation) mirrors contemporary evolutionary effects and is strongly associated with local adaptation (e.g., Collin & Fumagalli, ; Norberg & Leimar, ; Stöcklin, Kuss, & Pluess, ).…”