Radiation is no stress for Chornobyl's tree frogs

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Benny Trapp, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons
Benny Trapp, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons

Current radiation levels don't appear to be causing severe chronic damage in Chornobyl's green tree frogs which are living long hoppy lives, according to international research. The nuclear accident that occurred at the Chornobyl nuclear power plant in 1986 contaminated a large area and whether chronic exposure to the current radiation levels in the area has long-term effects on the animals living there is still hotly debated. The study found that for the frogs, at least, there appeared to be no impact on lifespan, indicators of ageing or levels of stress hormones. The authors say their results suggest that current radiation levels experienced by Chornobyl's tree frogs may not be high enough to cause severe chronic damage.

Media release

From: The Royal Society

Tadp-old - Frogs in and around the exclusion zone of the Chornobyl Nuclear Plant are living long and hoppy lives. Field sampling of 197 Eastern tree frogs (Hyla orientalis) in the Chornobyl region found only minor effects on the lifespan, ageing and stress markers, telomere length and corticosterone levels, respectively.  This suggests current radiation levels may not be high enough to cause severe chronic damage to semi-aquatic vertebrates. Biology Letters

Ionizing radiation has negligible effects on the age, telomere length, and corticosterone levels of Chornobyl tree frogs

Ionizing radiation is thought to cause severe damage on humans and wildlife. More than 35 years after the Chernobyl accident, we demonstrate that current radiation levels still present in the area, has minor effects on the lifespan (n=197 individuals) as well as on ageing and stress markers telomere length and corticosterone levels, respectively, of frogs. These findings suggest that current radiation levels present in Chernobyl may not be high enough to cause severe chronic damage to semi-aquatic vertebrates.

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Journal/
conference:
Biology Letters
Research:Paper
Organisation/s: Doñana Biological Station, Spanish National Research Council
Funder: This work was supported by the Swedish Radiation Protection Agency-SSM (SSM2018-2038) and Carl Tryggers Foundation (CT 16:344) to G.O., Uppsala University Zoological Foundation, Helga Ax:son Johnsons Stiftelse and Spanish Association of Terrestrial Ecology-AEET to P.B., and the French Institute for Radiological Protection and Nuclear Safety-IRSN to J.M.B. P.B. was also supported by a Juan de la Cierva Incorporación (Spanish Ministry of Science and Innovation, IJC2020-044682-I). J.M.B. was financially supported by IRSN and G.O. by the Spanish Ministry of Science, Innovation and Universities (Ramón y Cajal Program, RYC-2016-20656).
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