Steep declines in radioactive caesium after 30 years of monitoring alpine plants in mountain areas of central Norway

Author:
Tingstad L., Sandercock B. & Nybø S.
Year:
2024
Journal:
Journal of Environmental Radioactivity
Pages:
272: 107352 [9 p.]
Url:
https://doi.org/10.1016/j.jenvrad.2023.107352
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The Chernobyl accident exposed large areas of northern Europe to radiocaesium (137Cs). We investigated temporal and spatial variation in concentrations of radiocaesium among five functional groups of alpine plants at two mountain areas in central Norway over a 31-year period from 1991 to 2022. Average concentrations of radiocaesium were initially high in lichens and bryophytes at around 4600–6400 Bq/kg dry weight during 1991–1994 but then decreased dramatically over three decades to current concentrations of ed with higher concentrations among non-vascular than vascular plants. Common heather Calluna vulgaris was unusual among woody plants with high concentration of radiocaesium, especially in the new shoots. Our new estimates of concentrations and dynamics of radiocaesium for alpine plants in natural environments will be useful for modelling herbivore exposure and evaluating potential impacts on wildlife and human health. Keywords: Chernobyl ;vPlant uptake ; Lichens ; Mosses ; Radiocaesium ; Time series ; Vascular plants.
Id:
36518
Submitter:
zpalice
Post_time:
Monday, 03 June 2024 11:21