Sampling sites
| Image | Name | Latitude (N) | Longitude (E) | Country |
|---|---|---|---|---|
 |
Varna bay | 43.1733 | 27.9219 | Bulgaria |
 |
Varna lake | 43.2042 | 27.8594 | Bulgaria |
 |
Lesina | 41.88 | 15.441 | Italy |
 |
Mondego estuary | 40.14509 | -8.8579 | Portugal |
 |
Mallorca 1 | 39.311 | 2.999 | Spain |
 |
Mallorca 2 | 39.498 | 2.744 | Spain |
 |
Basque coast | 43.3487 | -1.9505 | Spain |
 |
Orwell & Stour | 51.9493 | 1.2911 | United Kingdom |