Data from: Plasticity cannot fully compensate evolutionary differences in heat tolerance across fish species

Understanding how evolution and phenotypic plasticity contribute to
variation in heat tolerance is crucial to predicting responses to warming.
Here we analyze 272 thermal death time curves of 53 fish species
acclimated to different temperatures and quantify their relative
contributions. Analyses show that evolution and plasticity account,
respectively, for 80.5 % and 12.4 % of the variation in elevation across
curves, whereas their slope remained invariant. Evolutionary and plastic
adaptive responses differ in magnitude, with heat tolerance increasing
0.54 ºC between species and 0.32 ºC within species for every 1 ºC increase
in environmental temperatures. After successfully predicting critical
temperatures under ramping conditions to validate these estimates, we show
that fish populations can only partly ameliorate the impact of warming
waters via thermal acclimation and this deficit in plasticity could
increase as the warming accelerates.