90Sr and stable element levels in bones of brown bears: long-term trends in bear populations from Croatia and Poland
- 3 December 2022
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Science and Pollution Research
- Vol. 30 (12), 32507-32522
- https://doi.org/10.1007/s11356-022-24397-4
Abstract
The aim of this study was to investigate the temporal trends and geographical differences in 90Sr and stable element (Ba, Ca, Mn, Sr, Pb, Zn) levels in the bones of Croatian and Polish brown bear (Ursus arctos) populations. Experimental data suggest that in the decades after nuclear weapon tests and the Chernobyl accident, 90Sr bone activity concentrations decreased from 352 to 11 Bq kg−1 in the Croatian bear population (period 1982–2015) and from 831 to 27 Bq kg−1 in Polish bears (period 1962–2020). Calculated effective and ecological half-lives were 9 and 13 years for Croatian bears, and 15 and 31 years for Polish bears, respectively. Different temporal trends were noted in levels of Ba, Mn, Pb and Zn between the two countries with majority of bones having lower Pb, Sr and Zn in Croatian than in Polish bears. Estimated values for the soil-to-bear transfer of 90Sr were the same order of magnitude in the studied populations. Contrary to this, the estimated transfer of stable Sr was an order of magnitude lower for the Croatian bear population compared to Polish bears. The observed differences in soil-to-bear transfer between stable Sr and 90Sr found for Croatian bears might suggest the need for careful consideration on the use of stable Sr data as an analogue for 90Sr. To our knowledge, this is the first study that analysed 90Sr activity in tissue of brown bears. As such, it provides insight into the fate and behaviour of one of the most relevant anthropogenic radionuclides at the top of the food chain.This publication has 70 references indexed in Scilit:
- Concentration of 137Cs and 40K in meat of omnivore and herbivore game species in mountain forest ecosystems of Gorski Kotar, CroatiaJournal of Radioanalytical and Nuclear Chemistry, 2013
- Environmental Protection: Transfer Parameters for Reference Animals and PlantsAnnals of the ICRP, 2009
- Ecological half-lives of 90Sr and 137Cs in terrestrial and aquatic ecosystemsJournal of Environmental Radioactivity, 2006
- Determination of strontium-90 in deer bones by liquid scintillation spectrometry after separation on Sr-specific ion exchange columnsJournal of Environmental Radioactivity, 2006
- 90Sr, 210Po and 210Pb in lichen and reindeer in NorwayJournal of Environmental Radioactivity, 2005
- Stable strontium accumulation by earthworms: A paradigm for radiostrontium interactions with its cationic analogue, calciumEnvironmental Toxicology and Chemistry, 2001
- Radiation contamination after the chernobyl nuclear accident and the effective dose received by the population of CroatiaJournal of Environmental Radioactivity, 1998
- Chernobyl90Sr in bilberries from PolandJournal of Radioanalytical and Nuclear Chemistry, 1997
- 90Sr in antlers and bone of a Danish roe deer populationJournal of Environmental Radioactivity, 1995
- Strontium-90 in antlers of red deer: an indicator of environmental contamination by strontium-90Science of The Total Environment, 1994