Marine macroalgae are widely used indicator species for monitoring environmental radioactivity. Empirical studies have demonstrated a range in radionuclide transfer coefficients, or concentration ratios (CRs), between taxonomic groups, however the CR values used for dose estimation assume that macroalgae are a homogenous group, represented by a single CR. This study demonstrates the presence of a taxonomic signal in macroalgae CRs for multiple anthropogenic and naturally occurring radionuclides (137Cs, 241Am, 239+240Pu, 210Po) based on a collation of available data. A Residual Maximum Likelihood (REML) mixed model was applied, producing relative estimate CRs specific to each species within the datasets. The collated data was also analysed for a phylogenetic signal, but only a weak signal was found for one radionuclide in one group (239+240Pu in Phaeophyceae). A theoretical case study using the estimated CRs and the ERICA tool was carried out to demonstrate the implications of these findings in a real-world scenario.

中文翻译：

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它在家庭中遗传吗？ - 利用大型藻类物种的分类学和系统发育视角改进沿海环境的放射性风险评估


海洋大型藻类是广泛用于监测环境放射性的指示物种。经验研究已经证明分类组之间的放射性核素转移系数或浓度比 (CR) 存在一定范围，但是用于剂量估计的 CR 值假设大型藻类是同质组，由单个 CR 代表。本研究根据现有数据的整理，证明了大型藻类 CR 中存在多种人为和自然产生的放射性核素（137Cs、241Am、239+240Pu、210Po）的分类信号。应用剩余最大似然 (REML) 混合模型，生成数据集中每个物种特定的相对估计 CR。还对整理的数据进行了系统发育信号分析，但仅发现一组中的一种放射性核素（褐藻纲中的 239+240Pu）有微弱的信号。使用估计的 CR 和 ERICA 工具进行了理论案例研究，以证明这些发现在现实场景中的影响。