NIES reported the population and sorts of sea invertebrate significantly decreased around Fukushima plant

Photo ; “Thais clavigera” [Wikipedia]


On 2/4/2016, NIES (National Institute for Environmental Studies)  announced that the invertebrates in intertidal zone are significantly decreased around Fukushima plant port after 311. The report was published on Scientific Reports on the day.


They implemented the study from 2011 to 2013. The sampling locations were over 50 points inside and outside the 20km radius area.

As a result, one of the main species “Thais clavigera” was never found in 30km length of the coastal area from Hirono-machi to Futaba-machi (4. 2012 ~ 8.2012). Because it was easily found in Iwate and Miyagi prefecture, NIES concluded that it is not related to Tsunami damage.

Also the population and the number of sorts of invertebrate were significantly smaller around Fukushima plant than the surrounding areas. Especially it was way smaller in the south area of Fukushima plant port. The number was small even comparing to Tepco’s own research result of 1995.

In the report, NIES stated because none of the new “Thais clavigera” was born in the 30km length of the coastal area, they need to keep watching the rate of reproduction of the local invertebrate.




Français :

Le NIES rapporte qu’autour de la centrale de Fukushima les populations et la biodiversité des invertébrés marins ont fortement diminué


Photo : “Thais clavigera” [Wikipedia]

Le 4 février 2016, le NIES (National Institute for Environmental Studies) a annoncé que les invertébrés de la zone intertidale ont fortement diminué autour de la centrale de Fukushima après mars 2011. Ce rapport a été publié dans le “Scientific Reports” du jour.

Ils ont effectué cette étude entre 2011 et 2013. Les endroits échantillonnés se répartissent sur plus de 50 points dans et hors des 20 km de rayon autour de la centrale.
Au final, sur une zone de 30 km de long de la zone côtière de Hirono-machi à Futaba-machi une des principales espèces, Thais clavigera, n’a jamais été retrouvée (avril 2012 à août 2012). Le NIES conclus que ce n’est pas lié aux dégâts du tsunami parce qu’on la trouvait facilement dans les préfectures d’Iwate et Miyagi.
En outre, par rapport aux régions voisines les populations et nombres d’espèces d’invertébrés ont fortement réduit autour de la centrale de Fukushima. En particulier, c’est particulièrement désert au sud du port de la centrale de Fukushima. Leur nombre est petit même en comparaison avec les résultats des propres recherches de Tepco de 1995.
Dans son rapport, le NIES affirme qu’ils ont besoin de continuer de surveiller le taux de reproduction des invertébrés locaux parce qu’aucun Thais clavigera n’est né dans la zone de 30 km de long de la bande côtière.

About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.


February 2016