Table 2. Similarity percentage analysis (SIMPER) identifying the elements contributing to the differences recorded in the shell of Cerastoderma edule from five locations within Mira (M1 and M2), Espinheiro (E1 and E2) and Ílhavo (I) channels in Ria de Aveiro, Portugal (Ind – individual; Cum – cumulative).
| M1 vs M2 |
M1 vs E1 |
M1 vs E2 |
M1 vs I |
M2 vs E1 |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Element | Ind (%) | Cum (%) | Element | Ind (%) | Cum (%) | Element | Ind (%) | Cum (%) | Element | Ind (%) | Cum (%) | Element | Ind (%) | Cum (%) |
| Ba | 38.52 | 38.52 | Mg | 38.32 | 38.32 | Sr | 35.57 | 35.57 | Pb | 41.50 | 41.50 | Ba | 29.75 | 29.75 |
| Mn | 38.47 | 76.99 | Sr | 34.08 | 72.40 | Mg | 20.80 | 56.37 | Mg | 16.69 | 61.19 | Mn | 29.56 | 59.31 |
| Sr | 11.31 | 88.31 | Mn | 10.16 | 82.56 | Ba | 17.35 | 73.72 | Sr | 16.24 | 77.42 | Mg | 27.61 | 86.93 |
| Mn | 16.86 | 90.58 | Ba | 11.41 | 88.84 | |||||||||
| M2 vs E2 | M2 vs I | E1 vs E2 | E1 vs I | E2 vs I | ||||||||||
| Element | Ind (%) | Cum (%) | Element | Ind (%) | Cum (%) | Element | Ind (%) | Cum (%) | Element | Ind (%) | Cum (%) | Element | Ind (%) | Cum (%) |
| Mn | 25.26 | 25.26 | Pb | 28.01 | 28.01 | Sr | 52.55 | 52.55 | Pb | 53.86 | 53.86 | Pb | 46.98 | 46.98 |
| Ba | 24.96 | 50.22 | Mn | 22.23 | 50.25 | Mg | 21.40 | 73.94 | Mg | 17.12 | 70.99 | Sr | 24.10 | 71.08 |
| Sr | 24.18 | 74.40 | Ba | 21.66 | 71.91 | Ba | 11.91 | 85.85 | Sr | 12.62 | 83.60 | Mg | 13.73 | 84.81 |
| Mg | 21.73 | 96.13 | Mg | 20.40 | 92.31 | |||||||||