Fig. 2

Correlations at a the gastrula stage and b the prism stage between PC1-PC8 (columns), which contribute > 80% of the explained variation in gene expression, and metadata variables (rows) of the experiment treatments (i.e., temperature and pCO₂), body size (i.e. embryo length in mm), and thermotolerance (i.e. LT₅₀ in °C, prism stage only). The orange-purple color scale represents the strength of the Pearson’s correlation (1 to − 1). *p < 0.05, **p < 0.01, and ***p < 0.001