a Differences in phenotypic variation of resource use between populations. b Differences in genomic diversity between populations. Tops and bottoms of the bars represent the 75th and 25th percentiles of the data, the white lines are the medians, and the whiskers extend from their respective hinge to the smallest or largest value no further than 1.5*interquartile range. Small points represent the diversity of a single population (four clones). The large points for pre-adapted populations represents the phenotypic and genomic diversity of the 24 clone pools.