Radiocaesium transfer and radiation exposure of frogs in Fukushima Prefecture

Tagami, K, Uchida, S, Wood, MD and Beresford, NA 2018, 'Radiocaesium transfer and radiation exposure of frogs in Fukushima Prefecture' , Scientific Reports, 8 (1) , p. 10662.

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Abstract

The International Commission on Radiological Protection has proposed an environmental assessment framework. This includes ionising radiation exposure assessment for different frog life-stages, but radiocaesium transfer parameters are unavailable. We collate data from the Fukushima Prefecture (contaminated by the Fukushima accident) and estimate radiocaesium concentration ratio (CR ) values for tadpoles and adult frogs, presenting the largest available amphibian CR dataset. In total, 513 adult frogs and 2540 tadpoles were analysed in 62 and 59 composite samples respectively. Results suggest that equilibrium was reached between water and amphibian radiocaesium activity concentrations circa one-year after the accident. Radiocaesium transfer to tadpoles was higher than to adult frogs. Dose rates were estimated for different life-stages and species in both the aquatic and terrestrial environment. Estimated dose rates to adults and tadpoles were typically similar because external exposure dominated for both organisms; frogspawn dose rates were estimated to be orders of magnitude lower than other life-stages. For the two sites assessed, which were outside of the most contaminated areas of the Fukushima Prefecture, estimated dose rates were below those anticipated to present a risk to wildlife populations; it is likely that dose rates in more contaminated areas were in excess of some effects benchmark values.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Journal or Publication Title: Scientific Reports
Publisher: Nature Publishing Group
ISSN: 2045-2322
Related URLs:
Funders: Natural Environment Research Council (NERC), Natural Environment Research Council (NERC), Agency for Natural Resources and Energy, the Ministry of Economy, Trade and Industry (METI), Japan
SWORD Depositor: Publications Router
Depositing User: Publications Router
Date Deposited: 25 Jul 2018 07:35
Last Modified: 07 Jun 2019 09:30
URI: http://usir.salford.ac.uk/id/eprint/47915

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