Genus: Euastrum
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 1996 | 1 | 2 | 2 | 2 |
| 1994 | 6 | 9 | 9 | 9 |
| 1993 | 5 | 6 | 6 | 7 |
| 1991 | 5 | 7 | 7 | 9 |
| 1990 | 6 | 11 | 11 | 22 |
| 1989 | 6 | 12 | 12 | 13 |
| Totalt alle år | 10 | 28 | 28 | 62 |
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Responsible editor: Doris Jorde