In a recent study at the University of Georgia, images of many different species of animals have been taken in Fukushima, Japan, where there was a nuclear disaster nine years ago. The people in the area had been evacuated to a safer place so that they wouldn’t suffer from the toxic radiation that causes cancer. However, animals like the wild boar, black bear, macaque, and raccoon dog (my pick for March Mammal Madness 2017) have been photographed in the area. Intrigued by how this could be possible, a team went to take data by taking tens of thousands of images of the different species.
Cameras were set in three different zones: high radiation, intermediate radiation, and low radiation. Humans are still inhabiting the low radiation area because it is safe enough where there is minimal contamination. Despite the nuclear contamination, most of the species inhabited the high radiation zone and the least inhabited the low radiation zone. 26,000 images of wild boars were taken in the uninhabited zone, 13,000 images in the restricted zone, and 7,000 in the inhabited zone. This was due to the fact that the animals were trying to stay away from human interaction and development. The team also evaluated the time of day when the animals were active, the elevation, and the type of terrain. Animals like the raccoon continued to be nocturnal in the uninhabited zone, while the wild boar was even more active during the day than before since it did not have to worry about being hunted. The Japanese serow differed from the rest of the animals as it actually spent more time in the human-inhabited zone because of the higher boar population in the uninhabited zone.
Although many would assume that animals would stray away from areas of high radiation like humans, the contrary occurred in Fukushima. The results showed that factors like human interaction, elevation, and habitat type played a larger role than the radiation levels for population size. How do you think these animals are able to survive in these conditions?