Partition of metallic and organochlorinated pollutants and monoorthosubstituted PCB pattern in the trophic web from different areas of the river Seine.

The partition of metals and organochlorines was studied along the trophic web at two different pollution level areas of the river Seine. The metal results along the trophic web were: (1) High concentration processes by the sediment (Kb from 0.7 x 10(2) to 32 x 10(2) according to metal). (2) Bioconcentration processes by the plants from the water and the sediment for all metals (Kb from 0.5 10(3) to 13.2 x 10(3)); (3) The mussel (benthic and fossorial) exhibited the highest metal levels; (4) the bream (benthic and detritivorous) had higher metal levels than the roach and the perch. No biomagnification was shown for the metals along the trophic web. The organochlorine results were: (1) High concentration in the sediment with Kb-values about 10(3). (2) A relationship between lipid and PCB levels in plants. (3) No rise in organochlorines along the trophic web at the slightly polluted areas. (4) Occurrence of organochlorine biomagnification in the highly polluted area. For the PCB pattern: (1) The profiles are similar in plants and the water. (2) Sediment and animals exhibited a rise in the more chlorinated congeners accompanied by an impoverishment of the less chlorinated and monoorthosubstituted ones with rising position in the trophic web.