| Region name | Decreasing (Nº of stations) | Decreasing (%) | No trend (Nº of stations) | No trend (%) | Increasing (Nº of stations) | Increasing (%) | Total (Nº of stations) |
|---|---|---|---|---|---|---|---|
| Black Sea (66) | 11 | 16.67 | 44 | 66.67 | 11 | 16.67 | 71.67 |
| Adriatic Sea (13) | 13 | 100 | 13 | ||||
| Greater North Sea (220) | 108 | 49.09 | 110 | 50 | 2 | 0.91 | 220 |
| Baltic Sea (583) | 81 | 13.89 | 458 | 78.56 | 44 | 7.55 | 583 |