Abstract: Abstract The contents of 137 Cs and 90 Sr have been determined in 29 samples of live and dead reindeer lichens (genera Cladonia ) collected at the “Kraton-3” underground nuclear explosion site (65.9°N 112.3°E, event year – 1978) in Yakutia, Russia in 2002. The area contamination was within the range of 0.36–700 and 0.13–770 kBq m −2 for 137 Cs and 90 Sr, respectively. The dead organisms were on average much more contaminated than the live ones. Vertical fractionation of the live lichen carpet demonstrated maximal activity concentr...
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