Estimated parameter values and their 95% confidence intervals as well as the maximum log-likelihoods (L) and corrected Akaike Information Criterion (AIC_C) for each co-limitation model as presented in Fig. 6.

Model 1a: Independent co-limitation, multiplicative form; model 1b: Independent co-limitation, minimum form (Liebig's Law); model 2a: Dependent co-limitation (CO2 uptake depends on P-limitation), and; model 2b: Dependent co-limitation (P uptake depends on CO2-limitation). N/A = not applicable (K is calculated from μmaxαmax−1), in model 2a model no confidence interval could be estimated for KP. The L and AICC were corrected for small sample size [40].