The University of Tokyo’s Atmosphere and Ocean Research Institute has found Cesium 137 & 134 in plankton specimens from 30km to 600km off shore of Japan into the Pacific. All monitoring stations found contaminated plankton ranging from .3 to 56.4 bq/kg dried weight. Researchers noted that while the individual plankton samples were below the Japanese safety threshold for food, the levels in the plankton will accumulate in the fish that eat them.
The elevated levels raise concerns about seafood in the Pacific. Fish tested in Japan frequently show with some level of contamination though usually below the government threshold.
This and other testing of the Pacific have found the radiation is not diluting away as some have claimed. How it will impact food safety and the health of the ocean remains to be seen.
One constant we have seen out of all the research groups studying the impact on the ocean is that more investigation needs to be done to fully understand what the impact on the ocean
will be and how it will impact food safety.
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