Fig. 2. Median observed rates of plasticity (λE ) in temperature tolerance for different classes of ectotherms animals. Data used represent calculated mean observed values for each species. Boxes represent the 25th and 75th percentiles, and whiskers represent 1.5 inter-quartile range from the box. Estimates obtained from a linear mixed effect model that controls for random effects as well as acclimation temperature and the slope of the estimated exponential decay function at the final measurement are given in Table 2.