Table 5. Gambierdiscus strain numbers, growth rate, coefficient of variation among strains, and intraspecific differences for each species and temperature (16–38°C).
| Species | Temperature (°C) | Number of strains | Growth rate (mean ± SD day-1) | Coefficient of variation (%) | p value |
|---|---|---|---|---|---|
| G. belizeanus | 16.0 | 4 | no growth | ||
| G. belizeanus | 17.5 | 4 | no growth | ||
| G. belizeanus | 18.5 | 4 | 0.03 ± 0.02 | 81.2 | 0.227 |
| G. belizeanus | 20.0 | 4 | 0.07 ± 0.04 | 53.1 | 0.051 |
| G. belizeanus | 21.0 | 4 | 0.10 ± 0.04 | 43.2 | 0.002 |
| G. belizeanus | 22.5 | 4 | 0.20 ± 0.02 | 9.4 | 0.553 |
| G. belizeanus | 24.0 | 4 | 0.25 ± 0.03 | 12.4 | 0.013 |
| G. belizeanus | 25.5 | 4 | 0.30 ± 0.04 | 13.4 | 0.005 |
| G. belizeanus | 27.0 | 4 | 0.34 ± 0.05 | 14.6 | 0.072 |
| G. belizeanus | 28.5 | 4 | 0.33 ± 0.05 | 15.1 | 0.022 |
| G. belizeanus | 30.0 | 4 | 0.30 ± 0.17 | 5.5 | 0.107 |
| G. belizeanus | 31.0 | 4 | 0.18 ± 0.09 | 50.6 | 0.010 |
| G. belizeanus | 32.5 | 4 | 0.04 ± 0.08 | 200.0 | 0.013 |
| G. belizeanus | 34.0 | 4 | no growth | ||
| G. belizeanus | 35.0 | 4 | no growth | ||
| G. belizeanus | 36.0 | 4 | no growth | ||
| G. belizeanus | 38.0 | 4 | no growth | ||
| G. caribaeus | 16.0 | 3 | no growth | ||
| G. caribaeus | 17.5 | 3 | 0.03 ± 0.04 | 104.5 | 0.046 |
| G. caribaeus | 18.5 | 3 | 0.12 ± 0.05 | 37.9 | 0.125 |
| G. caribaeus | 20.0 | 3 | 0.20 ± 0.02 | 10.2 | 0.123 |
| G. caribaeus | 21.0 | 3 | 0.23 ± 0.03 | 15.4 | 0.276 |
| G. caribaeus | 22.5 | 3 | 0.26 ± 0.04 | 15.5 | 0.063 |
| G. caribaeus | 24.0 | 3 | 0.28 ± 0.02 | 8.7 | 0.365 |
| G. caribaeus | 25.5 | 3 | 0.31 ± 0.08 | 24.4 | 0.025 |
| G. caribaeus | 27.0 | 3 | 0.33 ± 0.11 | 32.7 | 0.025 |
| G. caribaeus | 28.5 | 3 | 0.30 ± 0.10 | 32.0 | 0.026 |
| G. caribaeus | 30.0 | 3 | 0.32 ± 0.06 | 19.2 | 0.135 |
| G. caribaeus | 31.0 | 3 | 0.26 ± 0.04 | 17.0 | 0.213 |
| G. caribaeus | 32.5 | 3 | 0.20 ± 0.05 | 24.1 | 0.268 |
| G. caribaeus | 34.0 | 3 | 0.05 ± 0.06 | 116.8 | 0.189 |
| G. caribaeus | 35.0 | 3 | no growth | ||
| G. caribaeus | 36.0 | 3 | no growth | ||
| G. caribaeus | 38.0 | 3 | no growth | ||
| G. carolinianus | 16.0 | 3 | no growth | ||
| G. carolinianus | 17.5 | 3 | no growth | ||
| G. carolinianus | 18.5 | 3 | 0.01 ± 0.01 | 88.6 | 0.558 |
| G. carolinianus | 20.0 | 3 | 0.11 ± 0.01 | 13.1 | 0.680 |
| G. carolinianus | 21.0 | 3 | 0.16 ± 0.01 | 3.5 | 0.740 |
| G. carolinianus | 22.5 | 3 | 0.18 ± 0.02 | 8.5 | 0.310 |
| G. carolinianus | 24.0 | 3 | 0.21 ± 0.01 | 7.0 | 0.205 |
| G. carolinianus | 25.5 | 3 | 0.22 ± 0.03 | 16.0 | 0.006 |
| G. carolinianus | 27.0 | 3 | 0.22 ± 0.03 | 14.3 | 0.014 |
| G. carolinianus | 28.5 | 3 | 0.22 ± 0.01 | 6.3 | 0.736 |
| G. carolinianus | 30.0 | 3 | 0.13 ± 0.12 | 87.0 | 0.001 |
| G. carolinianus | 31.0 | 3 | 0.05 ± 0.05 | 87.5 | 0.350 |
| G. carolinianus | 32.5 | 3 | no growth | ||
| G. carolinianus | 34.0 | 3 | no growth | ||
| G. carolinianus | 35.0 | 3 | no growth | ||
| G. carolinianus | 36.0 | 3 | no growth | ||
| G. carolinianus | 38.0 | 3 | no growth | ||
| G. pacificus | 16.0 | 2 | no growth | ||
| G. pacificus | 17.5 | 2 | no growth | ||
| G. pacificus | 18.5 | 2 | no growth | ||
| G. pacificus | 20.0 | 2 | 0.03 ± 0.03 | 87.3 | 0.258 |
| G. pacificus | 21.0 | 2 | 0.16 ± 0.05 | 28.5 | 0.277 |
| G. pacificus | 22.5 | 2 | 0.23 ± 0.03 | 12.5 | 0.390 |
| G. pacificus | 24.0 | 2 | 0.27 ± 0.01 | 5.5 | 0.750 |
| G. pacificus | 25.5 | 2 | 0.27 ± 0.04 | 13.1 | 0.028 |
| G. pacificus | 27.0 | 2 | 0.31 ± 0.05 | 16.6 | 0.150 |
| G. pacificus | 28.5 | 2 | 0.30 ± 0.02 | 5.3 | 0.592 |
| G. pacificus | 30.0 | 2 | 0.30 ± 0.06 | 19.1 | 0.114 |
| G. pacificus | 31.0 | 2 | 0.30 ± 0.05 | 17.9 | 0.071 |
| G. pacificus | 32.5 | 2 | 0.24 ± 0.05 | 23.1 | 0.353 |
| G. pacificus | 34.0 | 2 | no growth | ||
| G. pacificus | 35.0 | 2 | no growth | ||
| G. pacificus | 36.0 | 2 | no growth | ||
| G. pacificus | 38.0 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 16.0 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 17.5 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 18.5 | 2 | 0.03 ± 0.04 | 141.4 | 0.185 |
| Gambierdiscus sp. type 4 | 20.0 | 2 | 0.07 ± 0.07 | 101.5 | 0.010 |
| Gambierdiscus sp. type 4 | 21.0 | 2 | 0.13 ± 0.11 | 86.3 | 0.009 |
| Gambierdiscus sp. type 4 | 22.5 | 2 | 0.20 ± 0.11 | 55.1 | 0.001 |
| Gambierdiscus sp. type 4 | 24.0 | 2 | 0.23 ± 0.15 | 65.4 | 0.002 |
| Gambierdiscus sp. type 4 | 25.5 | 2 | 0.25 ± 0.06 | 24.0 | 0.048 |
| Gambierdiscus sp. type 4 | 27.0 | 2 | 0.27 ± 0.06 | 21.3 | 0.017 |
| Gambierdiscus sp. type 4 | 28.5 | 2 | 0.22 ± 0.06 | 28.7 | 0.014 |
| Gambierdiscus sp. type 4 | 30.0 | 2 | 0.03 ± 0.02 | 50.0 | 0.504 |
| Gambierdiscus sp. type 4 | 31.0 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 32.5 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 34.0 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 35.0 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 36.0 | 2 | no growth | ||
| Gambierdiscus sp. type 4 | 38.0 | 2 | no growth |
Temperatures at which intraspecific variation was significant are listed in bold (α < 0.05).