福岛第一核电站半径60公里范围内的叶状地衣中的放射性铯活度浓度。
Radiocaesium activity concentrations in parmelioid lichens within a 60 km radius of the Fukushima Dai-ichi Nuclear Power Plant.
作者信息
Dohi Terumi, Ohmura Yoshihito, Kashiwadani Hiroyuki, Fujiwara Kenso, Sakamoto Yoshiaki, Iijima Kazuki
机构信息
Sector of Fukushima Research and Development, Japan Atomic Energy Agency, 6-6 Sakae-machi, Fukushima, Fukushima 960-8031, Japan.
Department of Botany, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan.
出版信息
J Environ Radioact. 2015 Aug;146:125-33. doi: 10.1016/j.jenvrad.2015.04.013. Epub 2015 May 20.
Radiocaesium activity concentrations ((134)Cs and (137)Cs) were measured in parmelioid lichens collected within the Fukushima Prefecture approximately 2 y after the Fukushima Dai-ichi Nuclear Power Plant accident. A total of 44 samples consisting of nine species were collected at 16 points within a 60 km radius of the Fukushima Dai-ichi Nuclear Power Plant. The activity concentration of (134)Cs ranged from 4.6 to 1000 kBq kg(-1) and for (137)Cs ranged from 7.6 to 1740 kBq kg(-1). A significant positive correlation was found between the (137)Cs activity concentration in lichens and the (137)Cs deposition density on soil (n = 44), based on the calculated Spearman's rank correlation coefficients as r = 0.90 (P < 0.01). The two dominant species, Flavoparmelia caperata (n = 12) and Parmotrema clavuliferum (n = 11), showed strong positive correlations, for which the r values were calculated as 0.92 (P < 0.01) and 0.90 (P < 0.01) respectively. Therefore, Flavoparmelia caperata and Parmotrema clavuliferum are suggested as biomonitoring species for levels of radiocaesium fallout within the Fukushima Prefecture.
在福岛第一核电站事故发生约两年后，对福岛县采集的类 Parmelia 地衣中的放射性铯活度浓度（¹³⁴Cs 和 ¹³⁷Cs）进行了测量。在福岛第一核电站半径 60 公里范围内的 16 个地点共采集了 44 个样本，由 9 个物种组成。¹³⁴Cs 的活度浓度范围为 4.6 至 1000 kBq kg⁻¹，¹³⁷Cs 的活度浓度范围为 7.6 至 1740 kBq kg⁻¹。根据地衣中 ¹³⁷Cs 活度浓度与土壤中 ¹³⁷Cs 沉积密度之间计算出的 Spearman 秩相关系数（r = 0.90，P < 0.01），发现两者之间存在显著正相关。两种优势物种，即黄腹衣（n = 12）和棒状粉衣（n = 11），显示出强烈的正相关，其 r 值分别计算为 0.92（P < 0.01）和 0.90（P < 0.01）。因此，黄腹衣和棒状粉衣被建议作为福岛县放射性铯沉降水平的生物监测物种。
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