Fig. 2: Sampling design.
From: Repeated genetic adaptation to altitude in two tropical butterflies
A Elevation map of the 30 populations sampled for this study in four geographical transects (Colombia West/East, Ecuador West/East). More details of each population can be found in Supplementary Table 1, number of whole-genome sequences included per altitude and transect is indicated above each map (H. erato, H. melpomene). Source data are provided as a Source Data file and Supplementary Data 1. The black scale bar represents 25 km. Maps and Heliconius subspecies present are depicted per transect (photo credit: C.D.J. McGuire Center for Lepidoptera and Biodiversity, Florida Museum of Natural History; Map data ©2019 Google obtained via RgoogleMaps package120), note that only Colombia East has different subspecies in the highlands compared to the lowlands. B Plot depicts trio sampling scheme, with mean altitudinal and geographical distance of the three population types (high, low, low distant) for both species. C Mean genome-wide Population Branch Statistic (PBS) trees averaged across the four transects per species and respective total sample size in brackets. Source data are provided in the Source Data file.
