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  • Spreadsheet from Wood et al.

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  • Concentration ratios (CRwo-media) are used in most radioecological models to predict radionuclide activity concentrations in wildlife from those in environmental media. 
  • This simplistic approach amalgamates the various factors influencing transfer within a single generic value and, as a result, comparisons of model predictions with site-specific measurements can vary by orders of magnitude. 
  • To improve model predictions, the development of ‘condition-specific’ CRwo-media values has been proposed (e.g. for a specific habitat or wildlife sub-category).  However, the
  • The underlying datasets for most CRwo-media value databases, such as the wildlife transfer database developed within the IAEA EMRAS II programme, include summarised data.
  • This presents challenges for the calculation and subsequent statistical evaluation of condition-specific CRwo-media values.  A
  •  A further complication is the common use of arithmetic summary statistics to summarise data in source references, even though CRwo-media values generally tend towards a lognormal distribution and should be summarised using geometric statistics.  In this paper, we propose
  • Wood et al. proposed a statistically-defensible and robust method for reconstructing underlying datasets to calculate condition-specific CRwo-media values from summarised data and deriving appropriate summary statistics.
  • To enable others to be able to conduct similar analyses of summarised data sets the authors have made the SPREADSHEET with macro's available.