Radiocesium ([sup 137]Cs) from the Chernobyl reactor in Eurasian woodcock and earthworms in Norway

摘要: To understand the ecological effects of Chernobyl reactor accident, we investigated radiocesium ([sup 137]Cs) levels in Eurasian woodcock (Scolopax rusticola), earthworms (Lambricidae), litter (dead organic materials lying on ground), humus (beneath 2 cm deep), and mineral soil samples (3-6 deep) from a heavily effected (20-60 kBq/m[sup 2][1 Bq = 1 nuclear fission/sec]) area Norway. The highest concentrations measured (1988 median 142 Bq/Kg) (1986 730 Bq/kg) for human food (600 Bq/kg fresh mass) only were found during 1986. Radiocesium decreased (P < 0.001) (40%) (95%) 1986 to 1990. There was no reduction total over same period. relatively high decreasing ratio first years following fallout could have been caused by ingesting abiotic with earthworms. decrease study (1986-90) probably resulted bioavailability after rather than disappearing ecosystem. 38 refs., 3 figs., tabs.