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Cesium levels in mushrooms have risen in several Japanese prefectures

[Asahi] Cesium levels in mushroom have also risen in various areas compared with last year http://fukushima-diary.com/2012/11/asahi-cesium-levels-in-mushroom-have-also-risen-in-various-areas-compared-with-last-year/
 by Mochizuki on November 21st, 2012 ·  
<Quote> [Asahi]
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As of Nov. 16, officials said 93 municipalities in 10 prefectures, including Fukushima, had a shipment restriction in place. For five prefectures–Aomori, Saitama, Yamanashi, Nagano and Shizuoka–wild mushrooms constitute the only produce for which a shipment ban is in effect.

Cesium levels have also risen in various areas compared with last year.
According to tests requested by the central government, the highest levels recorded this year were 120 becquerels in Aomori Prefecture, up from only 60 becquerels last year; 2,100 becquerels in Nagano Prefecture (1,320 becquerels last year); and 3,000 becquerels in Tochigi Prefecture (134 becquerels last year).

Yasuyuki Muramatsu, a chemistry professor at Gakushuin University who specializes in radiation effects on ecology, said, “While the detailed mechanism is still unclear, mushrooms can more easily absorb cesium in comparison to plants because they are fungi.” As for why cesium levels are higher this autumn, Muramatsu said, “There is the possibility that radioactive materials that were attached to the trunks and leaves of trees last year were washed away by the rain and entered the soil into which mushrooms extend their fungal filament.”

Muramatsu cautioned that some types of wild mushroom may have high cesium levels next year as well, which will require continued testing.

November 22, 2012 - Posted by Christina Macpherson | environment, Japan