Influence of body size on 137Cs uptake in marine animals
海洋生物の個体体長と137Csの取り込み量との関係

Derin Thomas
School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York 11794-5000
Derin Thomas
School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York 11794-5000
Thank you for presenting this interesting work. The seawater pathway was therefore certainly the most signifucantt immediately after the accident and the surface: volume ratio must therefore have been the most important factor. However, don’t you think that once the plume has passed, the ingestion has become the predominant factor, especially since generally it is considered that the assimilation efficiency of cesium is high?
Hi Sabine, I think I can comment here. In seawater, the radiocesium content of marine phytoplankton is barely detectable–too many competing ions, including stable Cs. Obviously this is not the case in freshwater systems. So, herbivorous zooplankton that eat marine phytoplankton get essentially no Cs through their diet. Once the Cs is taken up from the dissolved phase by the zooplankton, however, the assimilation of Cs is indeed high in the carnivores that consume these zooplankton.