Chernobyl exposure alters the gut bacteria of wild animals

July 16, 2018, University of Jyväskylä
Credit: University of Jyväskylä

Researchers at the Universities of Oulu and Jyväskylä, together with their collaborators in the U.S. and France, have shown that wild animals living in areas contaminated by radioactive material have a different community of bacteria within their digestive system (the gut microbiome) compared with animals that do not live in areas affected by an increase in radiation.

While quite a lot is known about how diet and lifestyle can alter the types of in humans, relatively little is known about the factors that can affect the gut of wild . More than 30 years ago, the nuclear accident at Chernobyl, Ukraine, released large amounts of radionuclides into the environment. While humans have limited access to the area surrounding the former Chernobyl , wildlife in this area is exposed to radioactive material that persists in the soil and food. Exposure to this radioactive material has wide-ranging biological impacts in many organisms, such as increased frequency of cataracts in bank voles.

Anton Lavrinienko and co-workers collected droppings from small rodents (the bank vole Myodes glareolus) living in surrounding the former Chernobyl nuclear power plant and from areas unaffected by radioactive fallout. Next, they obtained millions of sequences of DNA to identify and count the types of bacteria that were living within the guts of these bank voles. Bank vole guts contain hundreds of different species of bacteria. However, the abundance of two general categories of gut bacteria (the Firmicutes and the Bacteroidetes phyla) is altered in voles exposed to radioactive material, with fewer Bacteroidetes and more Firmicutes in animals caught from the contaminated places.

This research raises several questions. For example, are the changes in the types of gut bacteria a consequence of radiation exposure or because areas affected by radioactive material have different environments? Could the increase in Firmicutes improve the health of bank voles living in a radioactive environment, or is the altered microbiome an indicator of poor wildlife health? More research is required to know whether the wildlife affected by Chernobyl fallout could benefit from probiotic supplements.

Credit: University of Jyväskylä

Explore further: Radiation causes blindness in wild animals in Chernobyl

More information: Anton Lavrinienko et al. Environmental radiation alters the gut microbiome of the bank vole Myodes glareolus, The ISME Journal (2018). DOI: 10.1038/s41396-018-0214-x

Related Stories

Radiation causes blindness in wild animals in Chernobyl

February 10, 2016

This year marks 30 years since the Chernobyl nuclear accident. Vast amounts of radioactive particles spread over large areas in Europe. These particles, mostly Cesium-137, cause a low but long-term exposure to ionizing radiation ...

Recommended for you

New kind of aurora is not an aurora at all

August 20, 2018

Thin ribbons of purple and white light that sometimes appear in the night sky were dubbed a new type of aurora when brought to scientists' attention in 2016. But new research suggests these mysterious streams of light are ...

The bright ways forests affect their environment

August 20, 2018

For decades scientists have tried to understand why forests emit the volatile gases that give pine forests their distinctive smell. A new study led by the University of Leeds may have found the answer.

New study identifies strategies in US climate litigation

August 20, 2018

The courts have played a central role in climate change policy, starting with a landmark Supreme Court case that led to the mandatory regulation of greenhouse gases in the United States. How do the courts address climate ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.