Extended Data Table 2 Statistical model results for maximum thermal-tolerance limits (Tmax′), extreme body temperatures (Tb, protected) and TSM of marine and terrestrial ectothermic animals

From: Greater vulnerability to warming of marine versus terrestrial ectotherms

  1. Coefficients are from GAMMs fit to data on acclimatization-adjusted Tmax′ data (r2 = 0.63, n = 406 species), extreme Tb in thermal refugia (Tb, protected, r2 = 0.66, n = 387 species) and acclimatization-adjusted TSM in thermal refugia (r2 = 0.29, n = 387 species). As sensitivity tests, TSM models are shown that used raw Tmax (TSMnoacc, r2 = 0.30, n = 387 species), that used raw Tmax and included a fixed effect for acclimatization temperature (TSMaccterm, r2 = 0.37, n = 351 species), that adjusted Tmax with a species-specific acclimatization response ratio (TSMARRbyspp, r2 = 0.17, n = 69 species), that used 50%-larger marine behavioural thermoregulation adjustments (TSM_marBTmore, r2 = 0.25, n = 387 species) or that used 50%-smaller adjustments (TSM_marBTless, r2 = 0.33, n = 387 species). By focusing on thermal refugia, Tb, protected and TSM account for thermoregulatory behaviour that can mitigate the consequences of extreme but short-duration temperatures. Table shows coefficients with standard errors (SE), two-sided P values and relative variable importance from a model-choice approach. No adjustments for multiple comparisons were made. Relative variable importance indicates the relative weight of evidence in favour of including each variable. Table also shows empirical degrees of freedom (EDF) for smooth (Smth) terms. Realm measures the terrestrial effect, compared to marine. Method measures the effect of measuring lethal thermal-tolerance limits, as opposed to critical limits.
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