Radioactivity estimation of fruit bodies of the Leccinum genus fungi in the microecosystems of the riverbed bank of the r. Kremenka (Leningrad region, Gatchinsky distr.)

Abstract

The article proves that the maintenance of ¹³⁷Cs in dry fruit bodies of L. schistophilum, L. scabrum and L. versipelle from I–V microecosystems on alluvial-turfen soil does not exceed an admissible level of 2500 Bq/kg. In microecosystems I–V the activity of the measured material is comparable with not polluted forest ecosystems of Leningrad region. Concentration of ¹³⁷Cs in fruit bodies of L. holopus and L. variicolor from VI microecosystem is on the top border of admissible values and makes 2677 ± 270 Bq/kg. In dry soil of VI microecosystem concentration of ¹³⁷Cs makes 334 ± 76 Bq/kg. Accumulation of ¹³⁷Cs in fruit bodies of VI microecosystem is promoted by bog-podsolic ground, subacidic reaction of environment (рН 5,5) which provides migration of ¹³⁷Cs in soil structure. Comparison of the received data with the results of the measurements, carried out in wood and marsh ecosystems of Leningrad region, shows that the level of ¹³⁷Cs activity in fruit bodies from VI microecosystem is relatively similar to the activity of fruit bodies on sphagnum bogs and in the forested boggy sites. Refs 11. Таbles 1.

Keywords:

Leccinum, 137Cs, microecosystems of the riverbed bank of the river