Table 2. Achieved maximum growth rate ( µMAX) and light intensity required to reach that rate (EM µd) estimated from growth versus irradiance fit (R2 of each fit are presented) using eq. 1.
| Species | EM µd ( µmol photons m−2 s−1) | Error | µMAX (day−1) | Error | R2 of Fit | p-value Dunnett's (for µMAX) | Tukey HSD (for µMAX) |
| C. snowii (CHL5) | 585 | 25 | 1.12 | 0.14 | 0.98 | <.0001 | a |
| P. mucicola (CYA1) | 279 | 5 | 0.80 | 0.03 | 0.98 | 0.0002 | b |
| A. falcatus (CHL1) | 503 | 30 | 0.73 | 0.08 | 0.96 | 0.0095 | b |
| P. morum (CHL2) | 588 | 39 | 0.72 | 0.08 | 0.95 | 0.0151 | b |
| O. lacustris (CHL3) | 340 | 2 | 0.55 | 0.06 | 0.91 | 1 | a |
| C. obovata (CRY1) | 605 | 39 | 0.50 | 0.05 | 0.94 | 0.9688 | ab |
| A. spiroïdes (CYA4) | 187 | 6 | 0.43 | 0.03 | 0.87 | 0.2497 | ab |
| M. flos-aquae (CYA2) | 369 | 64 | 0.41 | 0.06 | 0.73 | 0.1189 | b |
| P. boryanum (CHL4) | 403 | 19 | 0.41 | 0.02 | 0.97 | 0.1189 | b |
| A. flos-aquae (CYA3) | 252 | 6 | 0.38 | 0.05 | 0.81 | 0.0257 | a |
| A. granulata (BAC2) | 375 | 18 | 0.34 | 0.01 | 0.95 | 0.0032 | a |
| F. crotonensis (BAC3) | 255 | 20 | 0.26 | 0.02 | 0.90 | <.0001 | b |
| All species | 401 | 29 | 0.54 | 0.05 | 0.48 | 1 | - |
The achieved maximal growth rate ( µMAX) obtained for individual species was compared to the fit obtained for all species grouped (All species) using Dunnett's test (p<0.05). Subsequent comparisons with Tukey test (p<0.05) were done to rank species in each subgroup (higher, equal or lower than All species µMAX). Presented error corresponds to the 95% confidence interval.