Table 1 Seasonal transition of Chlorella variabilis viruses concentration (PFU mL-1) for nine sampling sites
Sampling date | Water temp. (°C) | Site 1 | Site 2 | Site 3 | Site 4 | Site 5 | Site 6 | Site 7 | Site 8 | Site 9 |
|---|---|---|---|---|---|---|---|---|---|---|
2004 May | -- | 2.67 | 21.3 | 21.3 | 2.67 | 21.3 | 2.67 | ND | 85.3 | 21.3 |
June | 16.5-19.5 | 21.3 | 5.33 | 10.7 | 5.33 | 5.33 | -- | 10.7 | 171.0 | 42.7 |
July | 29.3-32.0 | ND | 0.67 | 0.67 | ND | 1.33 | -- | ND | 10.7 | 0.67 |
Sept. | 24.0-25.5 | 0.67 | 5.33 | 10.7 | 10.7 | -- | -- | -- | -- | -- |
Oct. | 16.0-16.9 | 0.67 | 1.33 | 10.7 | 5.33 | -- | -- | -- | -- | -- |
Nov. | 10.2-12.0 | 5.33 | 5.33 | 5.33 | 5.33 | -- | -- | -- | -- | -- |
Dec. | 8.8-11.2 | 0.67 | 1.33 | 21.3 | 0.33 | -- | -- | -- | -- | -- |
2005 Jan. | 3.9-6.8 | 21.3 | 1.33 | 0.67 | 0.67 | -- | -- | -- | -- | -- |
Feb. | 5.2-8.3 | 1.33 | 1.33 | 10.7 | 5.33 | -- | -- | -- | -- | -- |
Mar. | 8.0-9.4 | 5.33 | 10.7 | 21.3 | 5.33 | -- | -- | -- | -- | -- |
Apr. | 17.0-18.8 | 5.33 | 21.3 | 21.3 | 5.33 | -- | -- | -- | -- | -- |
June | 23.0-24.0 | 5.33 | 10.7 | 42.7 | 10.7 | -- | -- | -- | -- | -- |