Customer: Savannah River Ecology Laboratory, University of Georgia, USA
Objective: comparative mathematical analysis of distribution peculiarities of 90Sr and 137Cs accumulation in links of trophic chains (a trophic chain including 4 elements: soil, a plant ( Molinia caerulea), an insect ( Camponotus vagus), an amphibian ( Pelobates fuscus) was chosen as a model).
Results of the project:
- It was discovered that all links of a trophic chain have logarithmically normal nature of radionuclides accumulation distribution level. Nevertheless, there was a regular decrease of excess (Crt) and asymmetry (Asm) indices in the following chain: soil–plant– animal, i.e. we could observe a levelling of trophic chains links contamination.
- The comparison results for corresponding “soil–plant” pairs demonstrated that specific activity of 90Sr increases by a factor of 3.4, and specific activity of 137Cs – by a factor of 9.1. The content of 90Sr in toads increased (at the expense of bone tissue), and 137Cs content somewhat decreased.
Acting Director General
Mykhailo D. Bondarkov
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