Species: Vasspest (Elodea canadensis)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2012 | 1 | 1 | 1 | 1 |
| 2011 | 1 | 1 | 1 | 1 |
| 2006 | 1 | 1 | 1 | 6 |
| 2005 | 1 | 1 | 1 | 1 |
| 2004 | 1 | 2 | 2 | 2 |
| 1994 | 1 | 2 | 2 | 2 |
| 1991 | 1 | 2 | 2 | 2 |
| 1990 | 1 | 2 | 2 | 2 |
| 1989 | 1 | 4 | 4 | 4 |
| Totalt alle år | 1 | 12 | 12 | 21 |
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2012 | 1 | 1 | 1 | 1 |
| 2011 | 1 | 1 | 1 | 1 |
| 2006 | 1 | 1 | 1 | 6 |
| 2005 | 1 | 1 | 1 | 1 |
| 2004 | 1 | 2 | 2 | 2 |
| 1994 | 1 | 2 | 2 | 2 |
| 1991 | 1 | 2 | 2 | 2 |
| 1990 | 1 | 2 | 2 | 2 |
| 1989 | 1 | 4 | 4 | 4 |
| Totalt alle år | 1 | 12 | 12 | 21 |