Fig 3.
Rarefied Ne values are predicted by the second principal component (PC2) of climatic variability (A) and population age (B) in invading C. solstitialis populations. Rarefied Ne is positively correlated with PC2, for which larger values represent lower annual precipitation and greater seasonality in temperature (P=0.011), and with population age (P = 0.037). Lines show linear model fits and shading indicates the 95% confidence interval. Points represent partial residuals after accounting for other variables in the linear model.