Some indicators of biological cycle of <sup>137</sup>Cs and <sup>39</sup>K in forest ecosystems of Bryansk woodland in the remote period after Chernobyl fallouts
On the example of ecosystems of Bryansk woodland we are looking at the specialties of a biological cycle of <sup>137</sup>Cs and <sup>39</sup>К in а long period after Chernobyl fallouts. It is shown that in investigated phytocenoses reserves of <sup>137</sup>Cs in general biomass are concentrated in wood, minimal - in the outer layers of the core, in the yearly production, in assimilating organs and outer layers of the core respectively. The distribution of K reserves in overall biomass and yearly production almost identical to <sup>137</sup>Cs. For now new arrival of <sup>137</sup>Cs into the soil with litter in pine and birch forests is estimated as about 50% from BK capacity. Most of all <sup>137</sup>Cs comes with assimilating organs (needles and leaves). In pine forests the return of K into the soil with litter is almost the same as for <sup>137</sup>Cs.