Downward migration of 137Cs promotes self-cleaning of forest ecosystem by reducing root uptake of Japanese cedar in Fukushima

J Takahashi, S Iguchi, T Sasaki, Y Onda - Science of The Total Environment, 2024 - Elsevier
Approximately 70% of the area highly 137 Cs-contaminated by the Fukushima Daiichi
Nuclear Power Plant accident is forested. Decontamination works in most of these forests …

Effect of litter removal five years after the Fukushima accident on 137Cs uptake by Japanese cedar

Y Ohmae, W Sakashita, T Sakata, N Imamura… - Journal of …, 2024 - Elsevier
Removal of litter-associated 137 Cs from the forest floor (litter removal) can reduce the 137
Cs uptake by plants; however, the proposed effective period for litter removal was 1–2 years …

[HTML][HTML] Contamination processes of tree components in Japanese forest ecosystems affected by the Fukushima Daiichi Nuclear Power Plant accident 137Cs fallout

M Ota, J Koarashi - Science of The Total Environment, 2022 - Elsevier
In forests affected by the Fukushima Daiichi Nuclear Power Plant accident, trees became
contaminated with 137 Cs. However, 137 Cs transfer processes determining tree …

Six-year monitoring of the vertical distribution of radiocesium in three forest soils after the Fukushima Dai-ichi Nuclear Power Plant accident

J Takahashi, Y Onda, D Hihara, K Tamura - Journal of environmental …, 2018 - Elsevier
Abstract After the Fukushima Dai-ichi Nuclear Power Plant accident on March 2011, several
studies showed that the downward migration of 137 Cs from litter to mineral soil is more …

Impact of forest thinning on the dynamics of litterfall derived 137Cs deposits in coniferous forest floor after Fukushima accident

MT Teramage, Y Onda, H Kato, X Sun - Chemosphere, 2020 - Elsevier
The effects of a 50% forest thinning intensity on Fukushima-derived 137 Cs deposition by
litterfall and its discharge by runoff in hillslope coniferous forest were monitored using four …

Characterizing vertical migration of 137Cs in organic layer and mineral soil in Japanese forests: four-year observation and model analysis

K Muto, M Atarashi-Andoh, T Matsunaga… - Journal of environmental …, 2019 - Elsevier
Abstract Because of the Fukushima Dai-ichi Nuclear Power Plant accident, forest
ecosystems in wide areas were contaminated with 137 Cs. It is important to characterize the …

Redistribution of the soil 137Cs inventory through litter and sediment transport on a hillslope covered by deciduous forest in Fukushima, Japan

T Oda, N Hotta, S Miura, I Endo, K Tanoi… - Earth Surface …, 2022 - Wiley Online Library
The long‐term behaviour of radiocaesium (137Cs) activity concentrations in forest
ecosystems and their downstream impacts remain important issues in the deciduous …

Topographic heterogeneity effect on the accumulation of Fukushima-derived radiocesium on forest floor driven by biologically mediated processes

J Koarashi, M Atarashi-Andoh, E Takeuchi… - Scientific reports, 2014 - nature.com
The accident at the Fukushima Daiichi nuclear power plant caused serious radiocesium
(137Cs) contamination of forest ecosystems located in mountainous and hilly regions with …

[HTML][HTML] Estimation of the rate of 137Cs root uptake into stemwood of Japanese cedar using an isotopic approach

N Imamura, M Watanabe, T Manaka - Science of the Total Environment, 2021 - Elsevier
Japanese cedar (Cryptomeria japonica) is the main timber species in Japan. The prediction
of the temporal changes in the 137 Cs concentration in the stemwood of Japanese cedar …

Post-deposition early-phase migration and retention behavior of radiocesium in a litter–mineral soil system in a Japanese deciduous forest affected by the Fukushima …

J Koarashi, S Nishimura, T Nakanishi… - Chemosphere, 2016 - Elsevier
The fate of radiocesium (137 Cs) derived from the Fukushima nuclear accident and
associated radiation risks are largely dependent on its migration and retention behavior in …