Study shows wildlife has rebounded since Chernobyl disaster

Nearly 30 years after the Chernobyl nuclear disaster in Ukraine, elk, deer, boar and wolves are thriving in the exclusion zone deserted by humans, researchers have reported in an international study.

The study, published on Monday in the journal Current Biology, shows there are at least as many of these mammals inside the 4,200-square-kilometer perimeter around the nuclear plant as in uncontaminated nature reserves.

Researchers counted the animals using aerial observations of the zone that was devastated by an explosion in one of the plant's nuclear reactors in April 1986.

They found that there are seven times more wolves in the exclusion zone than in nearby parks.

"It's very likely that wildlife numbers at Chernobyl are much higher than they were before the accident," said Jim Smith of the University of Portsmouth in England.

"This doesn't mean radiation is good for wildlife, just that the effects of human habitation, including hunting, farming and forestry, are a lot worse."

Early studies after the nuclear disaster revealed major radiation effects on the exclusion zone, including a sharp decrease in the animal population.

The latest observations show nature's resilience and could provide insight into the long-term impact of the more-recent 2011 Fukushima nuclear disaster in Japan.

The helicopter survey data found a growing abundance of elk, roe deer and wild boar from one to 10 years after the accident.

A short-term reduction in the wild boar population was linked to a disease outbreak not related to radiation exposure. These increases coincided with a drop in elk and wild boar in other parts of the former Soviet Union.

"These unique data showing a wide range of animals thriving within miles of a major nuclear accident illustrate the resilience of wildlife populations when freed from the pressures of human habitation," said study co-author Jim Beasley at the University of Georgia.