Short- and long-term patterns of 137Cs in fish and other aquatic organisms of small forest lakes in southern Finland since the Chernobyl accident

• Title: Short- and long-term patterns of ¹³⁷Cs in fish and other aquatic organisms of small forest lakes in southern Finland since the Chernobyl accident

Author: Martti Rask, Ritva Saxén, Jukka Ruuhijärvi, Lauri Arvola, Marko Järvinen, Ulla Koskelainen, Iisa Outola, Pekka J. Vuorinen

Reference: Journal of Environmental Radioactivity Jan. 2012, vol.103, no.1, pp. 41-7.

doi: 10.1016/j.jenvrad.2011.08.002

Keywords: 137Cs, Chernobyl fallout, Forest lakes, Freshwater fish, Crustacean zooplankton, Asellus aquaticus

Abstract: ► In summer 1986 highest ¹³⁷Cs levels in planktivore fishes of short food chains. ► Since 1987 highest ¹³⁷Cs were recorded in predatory fish of highest trophic levels. ► High variation found also in ¹³⁷Cs of crustacean zooplankton and Asellus aquaticus. ► In long-term fish ¹³⁷Cs higher in clear seepage lakes than in humic drainage lakes. ► Increased transfer of ¹³⁷Cs into fish in seepage lakes was the reason suggested.

URL: http://www.sciencedirect.com/science/article/pii/S0265931X09001635

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