TABLE 2.
Cyanobacterial cell counts for Lake Tuusulanjärvi water samples in summer 2006, determined by microscopya
| Sample date | Count (% biomass) |
|||||
|---|---|---|---|---|---|---|
| Cyanobacteria | Subsection |
|||||
| I (Chroococcales) |
IV (Nostocales) | III (Oscillatoriales) | ||||
| Total | Microcystis | Woronichinia | ||||
| 21 June | 1,763,084 (20.8) | 1,762,108 (99.0) | NDb | 1,352 (1.6) | 300 (0.8) | 676 (0.2) |
| 10 July | 241,168 (38.3) | 159,835 (8.2) | 33,556 (2.1) | ND | 56,334 (91.3) | 24,999 (0.5) |
| 31 July | 848,751 (15.8) | 770,970 (82.9) | 6,866 (55.7) | 457 (1.1) | 7,782 (13.9) | 69,999 (3.4) |
| 21 Aug. | 1,575,210 (25.7) | 1,522,758 (83.3) | 1,200 (4.8) | ND | 15,948 (14.1) | 36,504 (2.7) |
| 7 Sept. | 590,824 (24.1) | 537,420 (78.8) | 6,760 (34.2) | 5,408 (1.4) | 20,956 (20.2) | 32,448 (0.8) |
a
Counts are presented as cell numbers (phytoplankton), colonies (subsection I), or filaments (subsections III and IV) per 100 ml water. In parentheses, the percentage of biomass of total cyanobacteria from phytoplankton or biomass of a cyanobacterial order/genus from total cyanobacteria is given.
b
ND, not detected.