Table 2.
Results of two-way ANOVAs of the effects of dissolved inorganic carbon (DIC) and pH and their interaction on growth rate, chlorophyll a (Chl a) and carotenoid contents, carotenoid: Chl ratio, rETRmax, light use efficiency (a), saturating light intensity (Ik), PIC, POC and PON contents, PIC/POC and POC/PON ratios, protein and carbohydrate contents, the percentages of protein–carbon to POC (Protein–C: POC), carbohydrate–carbon to POC (carbohydrate–C: POC), Chl–carbon to POC (Chl–C: POC) and carotenoid–carbon to POC (Carotenoid–C: POC), and the percentages of protein–nitrogen to PON (Protein–N: PON) and Chl–nitrogen to PON (Chl–N: PON).
| DIC | pH | DIC×pH | ||||
|---|---|---|---|---|---|---|
| F | p | F | p | F | p | |
| Growth rate | 130.12 | <0.01 | 210.44 | <0.01 | 16.43 | <0.01 |
| Chl a | 1199.04 | <0.01 | 514.14 | <0.01 | 23.02 | <0.01 |
| Carotenoid | 1130.68 | <0.01 | 787.43 | <0.01 | 59.55 | <0.01 |
| Carotenoid: Chl ratio | 0.61 | =0.45 | 26.25 | <0.01 | 108.56 | <0.01 |
| rETR max | 71.93 | <0.01 | 106.83 | <0.01 | 1.26 | =0.28 |
| a | 50.23 | <0.01 | 32.12 | <0.01 | 4.34 | =0.06 |
| I k | 2.95 | =0.11 | 20.32 | <0.01 | 1.36 | =0.27 |
| PIC content | 75.39 | <0.01 | 413.59 | <0.01 | 4.61 | =0.05 |
| POC content | 79.64 | <0.01 | 7.90 | =0.02 | 117.30 | <0.01 |
| PON content | 7.54 | =0.02 | 0.01 | =0.92 | 102.05 | <0.01 |
| PIC/POC ratio | 2.96 | =0.11 | 199.08 | <0.01 | 14.09 | <0.01 |
| POC/PON ratio | 9.92 | <0.01 | 1.96 | =0.19 | 0.56 | =0.47 |
| Protein content | 200.44 | <0.01 | 138.93 | <0.01 | 339.12 | <0.01 |
| Carbohydrate content | 248.18 | <0.01 | 4.06 | =0.07 | 26.01 | <0.01 |
| Protein–C: POC | 2.06 | =0.18 | 27.12 | <0.01 | 6.12 | =0.03 |
| Carbohydrate–C: POC | 34.24 | <0.01 | 0.32 | =0.58 | 12.58 | <0.01 |
| Chl–C: POC | 51.64 | <0.01 | 52.22 | <0.01 | 104.76 | <0.01 |
| Carotenoid–C: POC | 63.31 | <0.01 | 106.40 | <0.01 | 27.66 | <0.01 |
| Protein–N: PON | 34.84 | <0.01 | 50.75 | <0.01 | 5.58 | =0.04 |
| Chl–N: PON | 199.78 | <0.01 | 121.14 | <0.01 | 201.95 | <0.01 |