Order: Chlorococcales
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2014 | 1 | 1 | 1 | 1 |
| 2005 | 1 | 1 | 1 | 1 |
| 2004 | 2 | 1 | 1 | 2 |
| 2003 | 1 | 1 | 1 | 1 |
| 1998 | 4 | 2 | 2 | 4 |
| 1996 | 10 | 9 | 9 | 18 |
| 1994 | 32 | 28 | 27 | 85 |
| 1993 | 36 | 32 | 33 | 89 |
| 1992 | 7 | 3 | 3 | 8 |
| 1991 | 44 | 49 | 49 | 163 |
| 1990 | 63 | 57 | 58 | 296 |
| 1989 | 54 | 60 | 62 | 206 |
| Totalt alle år | 112 | 114 | 114 | 874 |