Lake Paijanne, Finland

Conkic et al. 1990). Chernobyl radioactivity, in particular and entering the Mediterranean as a single pulse, was rapidly removed from surface waters and transported to 200 m in a few days, primarily in fecal pellets of grazing zooplankton (Fowler et al. 1987). Bioconcentration factors (BCF) of Cs in hshes from Lake Paijanne, Finland — a comparatively contaminated area — ranged between 1250 and 3800 the highest BCF values were measured in the predatory northern pike (Esox lucius) a full 3 years after the Chernobyl accident consumption of these hshes was prohibited (Korhonen 1990). 

Sarkka, J., M.-L. Hattula, J. Janatuinen, and J. Paasivirta. 1978. Mercury and chlorinated hydrocarbons in plankton in Lake Paijanne, Finland. Environmental Pollution 16 41-49. 

Fig. 3. Mean concentrations of 236CYMS in mussels incubated in August 1986 at seven stations of the Kymijoki basin, Finland [32], MAT is reference station 40 km upstream of the first bleaching pulp mill in Aanekoski. Stations KUU, TOR, and KAR are 18,40, and 75 km downstream. LEH is 15 km downstream from another mill, where bleaching was stopped in 1981. PIL and HIR are stations of the Kymijoki River (outflow from the Lake Paijanne) upstream and downstream from additional large pulp milL Places of discharge are indicated as arrows...

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