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Transfer of radionuclides to ants, mosses and lichens in semi-natural ecosystems

机译：放射性核素向半自然生态系统中的蚂蚁，苔藓和地衣的转移

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摘要

There is a scarcity of data on transfer of both natural and anthropogenic radionuclides to detritivorous invertebrates for use in the assessment of radiation exposure. Although mosses and lichens have been extensively used in biomonitoring programs, the data on transfer of radionuclides to these species are limited, particularly for natural radionuclides. To enhance the available data, activity concentrations of 137Cs, 226Ra and 228Ra were measured in ants, mosses and lichens and corresponding undisturbed soil collected from semi-natural ecosystems in Serbia and Montenegro and biota/soil concentration ratios (CR) calculated. Since the majority of internal dose to biota is expected to come from 40K, the activity concentrations of this radionuclide were also determined. The mean CR values for 137Cs, 226Ra and 228Ra in ants analyzed in this study were found to be 0.02, 0.06 and 0.02, respectively. The mean CR values of radionuclides in mosses were found to be 2.84 for 137Cs, 0.19 for 226Ra and 0.16 for 228Ra, while those in lichens were found to be 1.08 for 137Cs, 0.15 for 226Ra and 0.13 for 228Ra. The CR values obtained in this study were compared with default CR values used in the ERICA Tool database and also with those reported in other studies.
机译：缺乏用于将天然和人为放射性核素转移到有害无脊椎动物中以用于评估辐射暴露的数据。尽管苔藓和地衣已广泛用于生物监测计划中，但放射性核素向这些物种转移的数据仍然有限，特别是天然放射性核素。为了增强现有数据，在蚂蚁，苔藓和地衣以及相应的未扰动土壤中测量了 137 Cs， 226 Ra和 228 Ra的活性浓度从塞尔维亚和黑山的半自然生态系统收集数据，并计算生物群/土壤浓度比（CR）。由于预期生物体内大部分剂量来自 40 K，因此还确定了这种放射性核素的活性浓度。本研究分析的蚂蚁中 137 Cs， 226 Ra和 228 Ra的平均CR值分别为0.02、0.06和0.02，分别。苔藓中放射性核素的平均CR值对于 137 Cs为2.84，对于 226 Ra为0.19，对于 228 Ra为0.16，而地衣中 137 Cs的1.08， 226 Ra的0.15和 228 Ra的0.13。将本研究中获得的CR值与ERICA Tool数据库中使用的默认CR值以及其他研究中报告的CR值进行比较。

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