| Name of region | Decreasing (Nº of stations) | Decreasing (%) | No trend (Nº of stations) | No trend (%) | Increasing (Nº of stations) | Increasing (%) | Total (Nº of stations) |
|---|---|---|---|---|---|---|---|
| Black Sea (65) | 25 | 38.46 | 40 | 61.54 | 65 | ||
| Adriatic Sea (16) | 16 | 100 | 16 | ||||
| Greater North Sea (224) | 70 | 31.25 | 133 | 59.38 | 21 | 9.38 | 224 |
| Baltic Sea (588) | 60 | 10.2 | 434 | 73.81 | 94 | 15.99 | 588 |