Arctic environment is very sensitive to anthropogenic pollutants, especially in terms of radionuclide contamination which persists in polar regions due to very slow biological turnover rate. The main aim of the study was to determine concentrations of ¹³⁷Cs in selected cryptogamic species (bryophytes and lichens) in different areas of Svalbard archipelago in the period of 1985–2017 and thus recognize the level of ¹³⁷Cs contamination in Svalbard as well as to indicate the best fallout originated radionuclide bioindicators in the Arctic region. The ¹³⁷Cs activity was measured in 31 samples of cryptogams (Cetraria islandica (L.) Ach., Cetrariella delisei (Bory ex Schaer.) Kärnefelt & A. Thell, Flavocetraria nivalis (L.) Kärnefelt & A. Thell, Ptilidium ciliare (L.) Hampe, Racomitrium lanuginosum (Hedw.) Brid., Sanionia uncinata (Hedw.) Loeske, and Sphaerophorus globosus (Huds.) Vain.) collected between 1985 and 2017 at six different locations in Svalbard: Adventdalen, Bellsund, Kaffiøyra, Ny-Ålesund, Petuniabukta, and Sørkapp Land. Analyses showed that species R. lanuginosum and C. delisei can be recommended as the best bioindicators of changes in radioactivity level in the Arctic region.

北极环境对人为污染物非常敏感，特别是在放射性核素污染方面，由于非常缓慢的生物更新速率，这种污染在极地地区仍然存在。这项研究的主要目的是确定1985-2017年间斯瓦尔巴群岛不同区域的某些隐性物种（苔藓植物和地衣）中¹³⁷ Cs的浓度，从而认识到斯瓦尔巴德群岛中¹³⁷ Cs的污染水平以及表明北极地区放射性尘埃生物指标最好的辐射源。的¹³⁷ Cs的活性在隐花的31个样品（测量冰岛衣（L.）乙酰胆碱。，Cetrariella delisei（博瑞前Schaer。）Kärnefelt＆A. Thell，Flavouretraria nivalis（L.）Kärnefelt＆A. Thell ，Ptilidium ciliare（L.）Hampe，Raconitrium lanuginosum（Hedw。）Brid。，Sanionia uncinata（Hedw。）Loeske和Sphaerophorus globosus（Huds.Va.） 1985年和2017年在斯瓦尔巴群岛的六个不同地点：阿德文达林，贝尔松德，卡菲耶拉，尼奥勒松，佩尤尼阿布克塔和索卡普土地。分析表明，物种R. lanuginosum和C. delisei可以被推荐为在北极地区放射性水平变化的最好的生物指标。