Rowan, D. & Rasmussen, J. B. Bioaccumulation of radiocesium by fish: the influence of physicochemical factors and trophic structure. Can. J. Fish. Aquat. Sci. 51, 2388–2410 (1994).
Wang, W. X., Ke, C., Yu, K. N. & Lam, P. K. S. Modeling radiocesium bioaccumulation in a marine food chain. Marine Ecol. Progress Series 208, 41–50 (2000).
Polis, G. A. & Strong, D. R. Food web complexity and community dynamics. Am. Nat. 141, 813–846 (1996).
Minagawa, M. & Wada, E. Stepwise enrichment of 15N along food chains: further evidence and the relation between 15N and animal age. Geochimica et Cosmochimica Acta 48, 1135–1140 (1984).
Tokyo Electric Power Company, Estimation of the released amount of radioactive materials into the atmosphere as a result of the accident in the Fukushima Daiichi Nuclear Power Station (2012). <http://www.tepco.co.jp/en/press/corp-com/release/betu12_e/images/120524e0201.pdf> (accessed 2012.11.26).
Kato, H., Onda, Y. & Gomi, T. Interception of the Fukushima reactor accident-derived 137Cs, 134Cs and 131I by coniferous forest canopies. Geophys. Res. Lett. 39, L20403 (2012).
Aerts, R. Climate, leaf litter chemistry and leaf litter decomposition in terrestrial ecosystems: a triangular relationship. Oikos 79, 439–449 (1997).
Miyashita, T., Takada, M. & Shimazaki, A. Experimental evidence that aboveground predators are sustained by underground detritivores. Oikos 103, 31–36 (2003).
Strand, P., Beresford, N. & Avila, R. (eds) Deliverable 1; Identification of Candidate Reference Organisms from a Radiation Exposure Pathways Perspective. A project within the EC 5th Framework Programme (2001). <https://wiki.ceh.ac.uk/download/attachments/115802176/fasset_d1.pdf>(accessed 2012.11.26).
Rudge, S. A., Johnson, M. S., Leah, R. T. & Jones, S. R. Biological transport of radiocaesium in a semi-natural grassland ecosystem. 1. Soils, vegetation and invertebrates. J. Environ. Radioactivity 19, 173–198 (1993).
Battiston, G. A. et al. Radioactivity in mushrooms in northeast Italy following the Chernobyl accident. J. Environ. Radioactivity 9, 53–60 (1989).
Bazala, M. A., Golda, K. & Bystrzejewska-Piotrowska, G. Transport of radiocesium in mycelium and its translocation to fruitbodies of a saprophytic macromycete. J. Environ Radioactivity 99, 1200–1202 (2008).
Eckl, P., Hofmann, W. & Tüurk, R. Uptake of natural and man-made radionuclides by lichens and mushrooms. Radiation Environ. Biophys. 25, 43–54 (1986).
Kalač, P. A review of edible mushroom radioactivity. Food Chemistry 75, 29–35 (2001).
Shibata, H., Mitsuhashi, H., Miyake, Y. & Nakano S. Dissolved and particulate carbon dynamics in a cool-temperate forested basin in northern Japan. Hydrological Process 15, 1817–1828 (2001).
Adam, C., Garnier-Laplace, J. & Baudin, J. P. Bioaccumulation of 110mAg, 60Co, 137Cs and 54Mn by the freshwater crustacean Daphnia magna from dietary sources (Scenedesmus obliquus and Cyclotella meneghiana). Water, Air, and Soil Pollution 136, 125–146 (2002).
Nimis, P. L., Bolognini, G. & Giovani, C. Radiocontamination patterns of vascular plants in a forest ecosystem. Forests and Radioactivity 157, 181–188 (1994).
Vinichuk, M., Mårtensson, A., Ericsson, T. & Rosén, K. Effect of arbuscular mycorrhizal (AM) fungi on 137Cs uptake by plants grown on different soils. J. Environ. Radioactivity 115, 151–156 (2013).
Avery, S. V. Fate of cesium in the environment: distribution between the abiotic and biotic components of aquatic and terrestrial ecosystems. J. Environ. Radioactivity 30, 139–171 (1996).
Davis, J. J. Cesium and its relationships to potassium in ecology. in Radioecology (ed. Schultz, V. & Klement, A. W.) 539–556 (Reinhold, New York, 1963).
MEXT (Japanese Ministry of Education, Culture, Sports, Science, and Technology) and DOE (the US Department of Energy), Results of Airborne Monitoring by the Ministry of Education, Culture, Sports, Science, and Technology and the US Department of Energy. (2011). <http://www.mext.go.jp/component/english/__icsFiles/afieldfile/2011/05/10/1304797_0506.pdf> (accessed 2012.11.26).
Lajtha, K. & Michener, R. H. Stable Isotopes in Ecology and Environmental Science (Blackwell Scientific Publications, Oxford., 1994).
Crawley, M. J. The R Book (John Wiley and Sons, Chichester., 2007).
R Development Core Team, R: A language and Environment for Statistical Computing (R Foundation for Statistical Computing, Vienna, 2011).
Hoover, M. D. & Lunt, H. A. A key for the classification of forest humus types. Soil Sci. Soc. Am. J. 16, 368–370 (1952).