Effects on Ecosystem
ＱHow have the radioactive Cs concentrations changed in wild animals in Fukushima prefecture?
ＡWild boars and Himalayan black bears captured at locations with a high radioactive Cs inventory in the soil tend to hold higher concentrations of radioactive Cs in their muscles. A comparison of the radioactive Cs concentrations in wild boars and Himalayan black bears captured at the same location indicated that the wild boars held a higher concentration of radioactive Cs in their muscles. The radioactive Cs concentration in the muscles of both species fluctuated seasonally, but the fluctuation patterns differed.
Fig.1 Relation between the 137Cs concentrations in the muscles of wild boars and Himalayan black bears and the 137Cs inventory in the soil at the capture location
The results indicated that the higher the 137Cs inventory in the soil at the capture location, the higher the 137Cs concentrations in the muscles of the wild boars and Himalayan black bears.
- Is there any increase in the number of mutations caused by radiation among wildlife in Fukushima prefecture?
- How have ecosystems changed in evacuation-order zones?
- Where is radioactive cesium deposited in forests, and how much? How do the locations and amounts change over time?
- How do air dose rates in forests change with time?
- Is there a continuous input of cesium contamination to rivers from forests?