Forest type effects on the retention of radiocesium in organic layers of forest ecosystems affected by the Fukushima nuclear accident
小嵐 淳; 安藤 麻里子; 松永 武; 眞田 幸尚
Koarashi, Jun; Atarashi-Andoh, Mariko; Matsunaga, Takeshi; Sanada, Yukihisa
Forest-floor organic layers play a key role in controlling the overall bioavailability of $$^{137}$$Cs in forest ecosystems; however, there is still an insufficient understanding of how forest types influence the retention capability of $$^{137}$$Cs in organic layers in Japanese forest ecosystems. Here we conducted plot-scale investigations on the retention of $$^{137}$$Cs in organic layers at two contrasting forest sites in Fukushima. In a deciduous broad-leaved forest, approximately 80% of the deposited $$^{137}$$Cs migrated to mineral soil located below the organic layers within two years after the accident, with an ecological half-life of approximately one year. Conversely, in an evergreen coniferous forest, more than half of the deposited $$^{137}$$Cs remained in the organic layers, with an ecological half-life of 2.1 years. The observed retention behavior can be well explained by the tree phenology and accumulation of $$^{137}$$Cs associated with litter materials with different degrees of degradation in the organic layers.
使用言語 : English
掲載資料名 : Scientific Reports (Internet)
: 6
ページ数 : p.38591_1 - 38591_11
発行年月 : 2016/12
出版社名 : Nature Publishing Group
特許データ :
論文URL :
キーワード : 福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 :
登録番号 : AA20160240
抄録集掲載番号 : 45000053
論文投稿番号 : 18389
Accesses  (From Jun. 2, 2014)
- Accesses
分野:Multidisciplinary Sciences
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