TABLE 1.
Environmental and biological parameters observed during the bloom of S. trochoidea
| Environmental parameter | Value by bloom stage of Scrippsiella trochoideaa |
||
|---|---|---|---|
| Before | During | After | |
| Temp (°C) | 25.9 ± 0.1a | 25.3 ± 0.1a | 22.3 ± 0.2a |
| Salinity (‰) | 29.4 ± 0.1a | 28.9 ± 0.1a | 28.1 ± 0.2a |
| pH | 8.07 ± 0.01a | 8.06 ± 0.01a | 8.07 ± 0.02a |
| Nitrate (NO3−) (mg liter−1) | 0.251 ± 0.03a | 0.056 ± 0.01b | 0.084 ± 0.015b |
| Nitrite (NO2−) (mg liter−1) | 0.016 ± 0.002a | 0.01 ± 0.005a | 0.007 ± 0.002b |
| Ammonium (NH4+) (mg liter−1) | 0.14 ± 0.0013a | 0.091 ± 0.004b | 0.205 ± 0.016c |
| Phosphate (PO43−) (mg liter−1) | 0.01 ± 0.002a | 0.002 ± 0.0005b | 0.002 ± 0.0007b |
| IN/IP ratio | 40.71 ± 6.93a | 31.39 ± 6.87a | 57.82 ± 7.69b |
| Biomass of algae (cells ml−1) | (5.5 ± 0.5) × 102a | (9.6 ± 0.3) × 103 b | (8.3 ± 0.2) × 102a |
| Chlorophyll a (μg liter−1) | 15.6 ± 2.3a | 170.59 ± 16.58c | 26.34 ± 4.29a |
| Fv/Fm value | 0.65 ± 0.05a | 0.62 ± 0.05a | 0.47 ± 0.04b |
a
Data represent the means ± standard deviations from triplicate technical measurements for the 12 collected samples. Different lowercase letters (a, b, and c) indicate statistically significant differences at P < 0.05 (a versus b) or P < 0.01 (a versus c and b versus c).