Figure 3.

(a) Plot of the average population distance from the ancestral COI haplotype in C. riparius against the number of potential generations per year (r = 0.556, p = 0.023). Average distances are based on a statistical parsimony network and the (uncorrected) p-distance from the ancestral haplotype and numbers of potential generations per year were modelled according to the experimentally assessed EmT₅₀-temperature dependency. (b) Plot of the population mutation parameter θ(π) against the annual mean temperature (r = 0.520, p = 0.028). Climate data were assessed from WorldClim and θ(π) was calculated for the COI data.