Open Access
Table 1
Density (individuals m−2) of Gammarus tigrinus and Potamopyrgus antipodarum in relation to the physical and chemical parameters of the water (ranges) in the tributaries of the upper Vistula River.
| Species | The Potok Gromiecki River | The Gostynia River | The Mleczna River | Inflow to the Mleczna River from the coal mine dewatering system | |
|---|---|---|---|---|---|
| Geographic coordinates | N 50°03.418′ | N 50°05.319′ | N 50°09.701′ | N 50°09.799′ | |
| E 19°18.260′ | E 18°58.885′ | E 19°00.317′ | E 19°00.338′ | ||
| Years of the surveys | 2010 | 2017 | 2015–2017 | 2014–2017 | 2014–2017 |
| Gammarus tigrinus | 91 | a few specimens | 28–261 | 120–1040 | 2–176 |
| Potamopyrgus antipodarum | 190 | 0 | 205–4461 | 23–62 | 290–7257 |
| Conductivity (μS cm−1) | 9740 | 40 900 | 2290–3370 | 2030–3090 | 2130–3540 |
| Chlorides (mg Cl− dm−3) | 2980 | 28 700 | 560–590 | 332–810 | 388–860 |
| Ammonium (mg NH4+ dm−3) |
0.89 | 2.99 | 0.61–0.97 | 0.24–0.91 | 0.16–2.82 |
| Phosphates (mg PO43− dm−3) |
0.26 | 0.21 | 0.19–0.24 | 0.04–0.32 | 0.01–0.14 |
| Hardness (mg CaCO3 dm−3) | 495 | 4498 | 450–485 | 480–570 | 485–645 |
| Salinity (‰) | 6.2 | 25.8 | 1.1–2.1 | 1.3–2.0 | 1.1–2.3 |
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