Table I. Synechococcus spp. strain origins and temperature preferences.
| Strain | Location and Date of Isolation | Pigment Typea | Minimum Annual Temperatureb | Maximum Annual Temperatureb | Average Annual Temperatureb | Approximate Temperature at Time of Isolationb | Maximum Growth Rate Temperaturec | Maximum Fv/Fm Temperaturec |
|---|---|---|---|---|---|---|---|---|
| (°C) | (°C) | (°C) | (°C) | (°C) | (°C) | |||
| WH7805 (CCMP837) | 33.7413°N, 67.5°W; Sargasso Sea, North Atlantic; June 30, 1978 | 2 | 21.7 | 28.7 | 22.5 | 26 | 18–24 | 21 ± 1.5 |
| CCMP1183 | 7.5°N, 134.5°E; near Palau, North Pacific; March 1, 1983 | 1 | 28.3 | 29.7 | 29.1 | 28 | 24 ± 1.5 | 18 ± 1.5 |
| CCMP1379 | 14.87°S, 148.68°W; Mataiva, near Tahiti, Society Islands, South Pacific; surface; 1985 | 1 | 27.1 | 29.2 | 28.3 | Unknown | ≥27 | 21 ± 1.5 |
| CCMP1630 | 40.75°N, 13.90°E; Ischia, Italy, near an offshore hot spring; Mediterranean, Tyrrhenian Sea; October 5, 1985 | 1 | 14.1 | 26.7 | 19.6 | 22 (or higher due to hot spring influence) | ≥27 | 21 ± 1.5 |
| CCMP1632 | 38.6°N, 118.65°E (approximately); Tiantsin, China (Wuhan), Beifang harbor, East China Sea, North Pacific; June 3, 1985 | 1 | 3.2 | 24.6 | 13.6 | 17 | 21 ± 1.5 | 21 ± 1.5 |
| WH8102 (CCMP2370) | 22.495°N, 65.6°W; Sargasso Sea, North Atlantic, from Oceanus cruise 92; March 15, 1981 | 3c | 25.1 | 28.9 | 27.0 | 25 | 21 ± 1.5 | 24 ± 1.5 |
| CCMP2606 | 15.31°N, 72.59°E; Arabian Sea, Indian Ocean near Goa, India; surface; October 2004 | 1 | 27.6 | 30.1 | 28.6 | 28 | ≥27 | 21 ± 1.5 |
| PCC 7002 | 17.969809°N, 67.046052°W; onshore, marine mud sample derived from fish pens on Magueyes Island, La Parguera, Puerto Rico; Caribbean Sea, North Atlantic; 1961 | 1 | 26.3 | 29.2 | 27.8 | Unknown | ≥27 | 21 ± 1.5 |
| WH8018 (CCMP838) | 41.5250°N, 70.6736°W; Woods Hole, Massachusetts; North Atlantic; June 1980 | 2 | 5.6 | 22.0 | 13.0 | 16 | ND | ND |
| CCMP841 | 39.5°N, 66.5°W (approximately); Research vessel Cape Hatteras Cruise, Gulf of Maine to North Atlantic; open ocean; August 1980 | 2 | 12.7 | 24.8 | 18.4 | 26 | ND | ND |
Pigment types are described by Six et al. (2007).
SST values were based on the weekly mean SST values over the period January 1990 to December 2011 as shown in Figure 4. The average annual temperature is the mean of all weekly values throughout the year. Minimum and maximum values are the lowest and highest weekly averaged temperature, as indicated by the ranges of the black lines in Figure 4. The approximate temperature at time of isolation is estimated to the nearest degree Celsius from the average weekly mean temperatures based on the date of isolation. “Unknown” indicates the date (and therefore temperature) of isolation is unavailable.
Optimal temperatures for growth rate and Fv/Fm were determined based on data plotted in Figure 5. Because experiments were carried out in 3°C increments, the error associated with each estimate is ±1.5°C. Strains CCMP838 and CCMP841 were only cultured at 15°C and 27°C, so Topt values were not determined (ND) for these strains.