Fig. 2: Stress-testing Responses.

a Overall stress testing responses for all fragments (n = 299) 124 days after pre-exposure treatment. Colors correspond to Fig. 1 and line type denotes historical phenotype. Dotted horizontal line represents 10% decline in relative fv/fm. b Mean ED10 estimates for each phenotype in each treatment, where larger values represent slower bleaching during thermal stress (n = 30 per treatment × phenotype). Shared x-axis with (a). Asterisks represent significant differences in ED10 in a treatment compared to control in a two-way ANOVA (NB: CH-C p = 0.003, P-C p = 0.028; b: CH-C p = 0.038, P-C p = 0.033). c Genotype-specific response to thermal stress in corals from the control and constant high pre-exposure treatments. Colors and dotted line correspond to (a). Historically bleached corals are in the top row, historically nonbleached corals are in the bottom row, with uncorrected two-way t-test p values comparing treatments and DHW gained or lost (Constant High minus Control) noted in each panel. Colors correspond to Fig. 1 and represent treatment. All fits include shaded error intervals which represent the 95% CI generated by drc. Source data are provided as a Source Data file.