Comparison of models of leaf maximum net photosynthetic capacity (Amax) and dark respiration rate (Rdark) in response to light level.

The models here are the nine possible combinations of, (1) a single value of μ (i.e., full-sun Amax or Rdark) shared by all species, (2) separate μ for deciduous and conifer trees, (3) species-specific μ; and (a) a single value of D for all species, (b) separate D for deciduous and conifer species, (c) species-specific D. The data are normalized either by area or by mass (norm). The number of parameters (df) of each model includes the variance of the error term in Equation (1). R2 is the coefficient of determination describing the overall fit of the model to data; and the Akaike Information Criterion (aic.ncor) is sample size-corrected following Bolker [35], , where k is the number of parameters, and n is the sample size. The AIC index without sample size-corrected showed the same results. The best model(s) (lowest aic.ncor) is highlighted in bold.