Table 1 Notations
NotationDescriptionFormula
Embedded ImageEmbedded Image: population size at time Embedded Image after the onset of the stress.
Embedded Image: initial population size at the onset of the stress.
Embedded ImageMutation rate per individual per unit time.
Embedded ImageNumber of traits under stabilizing selection, or phenotypic dimensionality.
Embedded ImageVariance of mutational effects: variance of the phenotypic effects of mutations, per trait, in a trait space scaled by the strength of stabilizing selectionEmbedded Image
Embedded ImageCritical mutation rate below which the SSWM regime is valid.Embedded Image
Embedded ImageEmbedded Image-dimensional vector Embedded Image of (breeding values for) phenotype
Embedded ImageEmbedded Image optimal phenotype in a given environmentEmbedded Image new environment
Embedded Image average phenotype of the ancestral population (before the onset of stress)Embedded Image previous environment
Embedded ImageGrowth rate (Embedded Image) and reproductive variance (Embedded Image) of a given genotype, in the new environment.Equation (1)
Embedded ImageMaximum possible growth rate in the new environment.Embedded Image
Embedded ImageRate of decay of the ancestral phenotypeEmbedded Image in the new environment.Embedded Image
Embedded ImageCost of a mutation: selective disadvantage of the mutant, relative to the optimal phenotype, in the previous environment.Embedded Image
Embedded ImageHarmonic mean of the cost Embedded Image among de novo mutations with scaled growth rateEmbedded Image in the new environmentEquation (3)
Embedded ImageGrowth rate of a genotype, in the new environment, scaled by Embedded Image.Embedded Image
Embedded ImageProbability density function of Embedded Image among random single step mutationsEquation (2)
Embedded ImageRate of decay scaled byEmbedded ImageEmbedded Image
Embedded ImageAlternative measure ofEmbedded ImageEmbedded Image (Equation (6))
Embedded ImageEffective stress levelEquation (6)
Embedded ImageCharacteristic stress level (Embedded Image) or decay rate (Embedded Image) beyond which ER probability drops below Embedded ImageEquation (8)
Embedded ImageFunction driving the dependence of rescue probabilities on stress levels.Equations (7a) and (7b)
Embedded ImageEmbedded Image rate of rescue from de novo mutations scaled by Embedded ImageEquations (5), (7a) and (7b)
Embedded Image corresponding approximation whenEmbedded Image
Embedded ImageEmbedded Image rate of rescue from standing variance scaled by Embedded ImageEquations (5) and (10)
Embedded Image corresponding approximation whenEmbedded Image
Embedded ImageProbability of rescue.Embedded Image
Embedded ImageProportion of rescue events caused by standing variantsEquation (10)