Table 2.
Mean values of metals concentrations in water (mg L−1), sediments, bivalve soft tissues, and roots and leaves of Phragmites australis (mg kg−1) in the relation to the collection sites and metal pollution index (MPI)
| Sample | Area | Cd | Co | Cr | Cu | Fe | Mn | Ni | Pb | Zn | MPI |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Water | S | b.d.l. | 0.02 | 0.12 | b.d.l. | 4.48NW | 1.22NW | 0.02 | b.d.l. | 0.99NW | – |
| N | b.d.l. | 0.02 | 0.14 | b.d.l. | 0.38SW | 0.05SW | 0.01 | b.d.l. | 0.41S | ||
| W | b.d.l. | b.d.l. | 0.26 | b.d.l. | 0.70SN | 7.40SN | 0.01 | b.d.l. | 0.52S | ||
| Sediment | S | 0.08 | 0.31 | 7.41 | 10.08W | 4560.00W | 678.67W | 3.94 | 3.36N | 72.72N | 12.1 |
| N | 0.09 | 0.30 | 8.07 | 9.80W | 4163.33W | 641.67W | 4.24 | 1.95SW | 65.28W | 11.3 | |
| W | 0.11 | 0.36 | 8.26 | 19.90SN | 5020.00SN | 893.00SN | 5.08 | 3.19N | 89.70N | 15.2 | |
| Phragmites australis roots | S | 0.07 | 0.79NW | 7.92NW | 9.99W | 2044.00NW | 921.25NW | 5.07W | 2.50N | 81.10NW | 12.7 |
| N | b.d.l. | 0.29SW | 3.93SW | 7.74W | 251.00SW | 453.00SW | 3.91W | 1.17SW | 54.70SW | 5.1 | |
| W | 0.09 | 0.53SN | 16.25SN | 17.65SN | 3070.00SN | 1295.00SN | 7.85SN | 2.13N | 101.50SN | 16.5 | |
| Phragmites australis leaves | S | 0.11 | 0.59NW | 4.70NW | 6.14N | 224.00W | 773.00N | 2.59N | 2.01N | 47.10NW | 7.5 |
| N | b.d.l. | 0.14S | 3.66W | 3.66SW | 260.50W | 203.50SW | 1.93N | 1.13SW | 59.40SW | 3.7 | |
| W | 0.10 | 0.07S | 5.79N | 5.79N | 440.50SN | 861.50N | 3.12SN | 2.08N | 79.00SN | 7.1 | |
| Anodonta anatina | S | 0.024 | 0.20 | 0.45N | 10.11W | 83.68W | 35.30W | 0.17NW | 0.17N | 35.90W | 1.6 |
| N | 0.049 | 0.10 | 0.19SW | 8.56W | 72.24W | 23.39W | 0.04S | 0.04SN | 35.40W | 1.0 | |
| W | 0.06 | 0.14 | 0.40N | 11.50SN | 106.00SN | 52.10SN | 0.12S | 0.13N | 50.29SN | 1.8 | |
| Anodonta cygnea | S | 0.12 | 0.10 | 0.89NW | 5.89W | 44.34W | 28.10W | 1.13NW | 0.19 | 29.25W | 2.0 |
| N | 0.04 | 0.15 | 0.29SW | 3.60W | 46.90W | 16.21W | 0.70S | 0.11 | 22.70W | 1.3 | |
| W | 0.07 | 0.06 | 0.74SN | 7.91SN | 172.00SN | 61.01SN | 0.74S | 0.21 | 43.20SN | 2.3 | |
| Unio tumidus | S | 0.04 | 0.20 | 1.37NW | 5.25W | 62.01W | 18.65NW | 1.32W | 0.21 | 41.41W | 2.1 |
| N | b.d.l. | 0.15 | 0.68SW | 3.28W | 54.37W | 9.73SW | b.d.l. | b.d.l. | 36.50W | 0.7 | |
| W | 0.02 | 0.21 | 0.83SN | 7.74SN | 109.00SN | 32.40SN | 0.20S | 0.20 | 61.16SN | 1.8 |
Bolding indicates the significance difference in metal concentrations between sites (Kruskal-Wallis H test, p < 0.05). Letters specify which sites differ from each other (Dunns post hoc test, p < 0.05)
Sampling sites: S southern site (M1–M3); N northern site (M4–M6); E western part (M7–M8), b.d.l. below detection limit