Table 1. Sampling sites.
| SP | Stretch | Name of SP | River km | Country |
|---|---|---|---|---|
| JDS2 | upper | Kelheim, gauging station | 2415 | DE |
| JDS3 | upper | Geisling power plant | 2354 | DE |
| JDS8 | upper | Oberloiben | 2008 | AT |
| JDS10 | upper | Wildungsmauer (Vienna)* | 1895 | AT |
| JDS22 | upper | ds Budapest* | 1632 | HU |
| JDS28 | middle | us Drava* | 1384 | HR/RS |
| JDS36 | middle | ds Tisa / us Sava | 1200 | RS |
| JDS38 | middle | us Pancevo (Belgrade)* | 1159 | RS |
| JDS49 | middle | Pristol / Novo Salo | 834 | RO/BG |
| JDS57 | down | ds Ruse* | 488 | RO/BG |
| JDS59 | down | ds Arges (Bucharest)* | 429 | RO/BG |
| JDS63 | down | Siret | 154 | RO |
| JDS67 | down | Sulina Arm | 26 | RO |
| JDS68 | down | St.Gheorge Arm | 104 | RO |
JDS3 sampling sites chosen for isolation and their assignment to the upper-, middle- or downstream stretches (SP = sampling point, us = upstream, ds = downstream). Country codes: Germany, DE; Austria, AT; Hungary, HU; Croatia, HR; Serbia, RS; Romania, RO; Bulgaria, BG;
* represent sites close to cities.