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Time sampling design according to organs and sites.
| Organs | studied metals | Sites | Sampling time | studied period |
| Leaves | Cr, Ni, Cu, Zn, Cd, and Pb | Calvi | - 1988 (February and May) | 1988 – 2004 |
| - 1993 (March, June, September and December) | ||||
| - 1994 (February, April and June) | ||||
| - 2003 (November) | ||||
| - 2004 (December) | ||||
| Sheaths | Cr, Ni, Cu, Zn, As, Se, Cd and Pb | Calvi | - 2001 (November) | 1992 – 2002 |
| Lumio | - 2002 (February) | (dated back) | ||
| Saint-Florent | ||||
| Nonza | ||||
| Macinaggio | ||||
| Bastia | ||||
