There was a recent report in the Smithsonian about the increased leaf litter in the damaged area around Chernobyl.
The team decided to investigate this question in part because of a peculiar field observation. “We have conducted research in Chernobyl since 1991 and have noticed a significant accumulation of litter over time,” the write. Moreover, trees in the infamous Red Forest—an area where all of the pine trees turned a reddish color and then died shortly after the accident—did not seem to be decaying, even 15 to 20 years after the meltdown….“Apart from a few ants, the dead tree trunks were largely unscathed when we first encountered them,” says Timothy Mousseau, a biologist at the University of South Carolina, Columbia, and lead author of the study. “It was striking, given that in the forests where I live, a fallen tree is mostly sawdust after a decade of lying on the ground.”
The results were telling. In the areas with no radiation, 70 to 90 percent of the leaves were gone after a year. But in places where more radiation was present, the leaves retained around 60 percent of their original weight. By comparing the mesh with the panty hose-lined bags, they found that insects play a significant role in getting rid of the leaves, but that the microbes and fungi played a much more important role.
Other studies have found that the Chernobyl area is at risk of fire, and 27 years’ worth of leaf litter, Mousseau and his colleagues think, would likely make a good fuel source for such a forest fire. This poses a more worrying problem than just environmental destruction: Fires can potentially redistribute radioactive contaminants to places outside of the exclusion zone, Mousseau says. “There is growing concern that there could be a catastrophic fire in the coming years,” he says.
For much of history, a disaster ended when the event was over. Typhoons, forest fires, earth quakes caused catastrophic damage, but then the event was over, and recovery could begin. Radiation of the environment is an event that never stops. A major fire in this litter would be able to send radiation into the atmosphere and around the world.