Table 3.
Mean metal concentrations in sediments in Cockburn/Warnbro Sounds, plus comparable data collected from Warnbro Sound in 1977. Means are calculated from 3 replicates, with standard errors provided in brackets.
| Site | Sediment Fe (ppm) | Sediment Zn (ppm) | Sediment Mn (ppm) | Sediment Cr (ppm) | Sediment Cu (ppm) | Sediment Cd (ppm) |
|---|---|---|---|---|---|---|
| GI 2 m | 39.37 (1.3) | 1.62 (0.6) | 1.28 (0.01) | 0.92 (0.04) | 0.20 (0.01) | 0.004 (0.001) |
| GI 3 m | 62.23 (3.0) | 1.52 (0.3) | 1.46 (0.1) | 0.57 (0.01) | 0.43 (0.01) | 0.008 (0.002) |
| GI 5 m | 51.13 (2.1) | 1.25 (0.2) | 1.07 (0.03) | 0.69 (0.07) | 0.24 (0.02) | 0.005 (0.001) |
| GI 7 m | 79.43 (9.2) | 1.90 (0.3) | 1.28 (0.05) | 0.60 (0.05) | 0.35 (0.03) | 0.005 (0.0003) |
| EB 2 m | 34.80 (2.7) | 1.66 (0.07) | 0.87 (0.02) | 0.34 (0.006) | 0.24 (0.02) | 0.003 (0.001) |
| EB 7 m | 109.73 (3.7) | 6.78 (0.9) | 2.16 (0.03) | 0.27 (0.006) | 0.53 (0.01) | 0.008 (0.001) |
| EB 5 m | 64.80 (14.1) | 7.51 (2.3) | 1.14 (0.2) | 0.47 (0.009) | 0.39 (0.1) | 0.002 (0.001) |
| EB 3 m | 57.17 (0.8) | 5.51 (0.7) | 1.10 (0.01) | 0.67 (0.007) | 0.41 (0.06) | 0.006 (0.002) |
| WS 2 m | 31.70 (3.2) | 1.09 (0.8) | 1.23 (0.03) | 1.01 (0.02) | 0.13 (0.003) | 0.003 (0.001) |
| WS 3 m | 43.90 (5.5) | 0.48 (0.09) | 1.36 (0.05) | 0.94 (0.02) | 0.16 (0.007) | 0.004 (0.001) |
| WS 5 m | 83.20 (15.3) | 1.29 (0.5) | 1.90 (0.1) | 0.60 (0.07) | 0.41 (0.2) | 0.009 (0.002) |
| WS 7 m | 88.83 (3.9) | 1.14 (0.3) | 1.89 (0.09) | 0.57 (0.03) | 0.27 (0.02) | 0.006 (0.001) |
| Cockburn Sound 1977 1 | 3647.62 | 15.02 | 10.16 | 25.01 | 11.36 | 0.37 |
1Talbot and Chegwidden (1983).