Table 3. Population index trends in the Odra River Estuary (ORE) for the regional biogeographic (flyway) population (b.p.) of diving waterbirds showing the percentage of the flyway population in 1992; the percentage of the flyway population in 2016; the mean percentage of the flyway population in the period 1992–2016 ± standard error; and the trend in the period 1992–2016.
| Species | %b.p.1992 | %b.p.2016 | Mean1992–2016 ± SE | Trend in ORE |
|---|---|---|---|---|
| Greater Scaup | 5.68 | 12.60 | 14.17 ± 2.84 | ↑ |
| Tufted Duck | 2.87 | 4.79 | 2.61 ± 0.25 | ↑ |
| Common Goldeneye | 4.48 | 0.63 | 1.21 ± 0.14 | → |
| Eurasian Coot | 0.86 | 0.68 | 0.61 ± 0.07 | → |
| Goosander | 12.59 | 1.80 | 6.85 ± 1.01 | → |
| Smew | 7.04 | 2.76 | 7.01 ± 1.27 | ↓ |
| Common Pochard | 1.84 | 0.20 | 0.62 ± 0.09 | ↓ |