Estimate the critical thermal minimum of a thermal performance curve

Estimate the critical thermal minimum of a thermal performance curve

Usage

get_ctmin(model)

Arguments

model

nls model object that contains a model of a thermal performance curve

Value

Numeric estimate of critical thermal minimum (ºC)

Details

Optimum temperature is calculated by predicting over a temperature range 50 degrees lower than the minimum value in the dataset. The predicted rate value closest to 0 is then extracted. When this is impossible due to the curve formula (i.e the Sharpe-Schoolfield model), the temperature where the rate is 5 percent of the maximum rate is estimated. Predictions are done every 0.001 ºC value so the estimate of the critical thermal minimum should be accurate up to 0.001 ºC.