Spatiotemporal change of cesium-137 in the Pacific coast of Tohoku, Japan: The mussel watch approach
Spatiotemporal change of cesium-137 in the Pacific coast of Tohoku, Japan: The mussel watch approach
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日本东北太平洋沿岸铯 137 的时空变化：贻贝观测方法
DOI：
10.1016/j.marpolbul.2021.112413
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发表时间：
2021
影响因子：
5.8
通讯作者：
Ogawa Hiroshi
中科院分区：
文献类型：
--
作者：
Murakami-Sugihara Naoko;Shirai Kotaro;Tazoe Hirofumi;Mizukawa Kaoruko;Takada Hideshige;Yamagata Takeyasu;Otosaka Shigeyoshi;Ogawa Hiroshi
我们测量了2011年至2015年从东北太平洋沿岸采集的贻贝组织中的放射性铯，以调查沿海地区放射性铯的时空动态。在2011年收集的所有样本中都检测到了放射性137 Cs，但在2012年之后的仙台以北地区的样本中没有发现。相比之下，即使在2012年至2015年期间，福岛地区的许多地点也检测到了137 Cs。贻贝组织中137Cs浓度的波动反映了海水中悬浮颗粒物中137Cs浓度的变化，表明有土壤沉积物的流入和海底沉积物的再悬浮。这些结果表明，贻贝组织中的137 Cs浓度敏感地指示了环境中的137 Cs浓度，并且“贻贝观察”方法是了解沿海地区放射性铯浓度动态的有效方法。
We measured radiocesium in mussel tissue collected from the Pacific coast of Tohoku from 2011 to 2015 to investigate the temporal and spatial dynamics of radiocesium in the coastal area. Radioactive137Cs was detected in all the samples collected in 2011, but it was not found in samples from localities north of Sendai after 2012. In contrast,137Cs was detected in many sites in the Fukushima area even from 2012 to 2015. The fluctuation of137Cs concentration in mussel tissue seems to reflect the137Cs concentration in suspended particles in the seawater, suggesting that there was an influx of soil deposition and resuspension of seabed sediment. These results suggest that the137Cs concentration in mussel tissue sensitively indicates the137Cs concentration in the environment, and that the “mussel watch” approach is an effective way to understand the dynamics of radiocesium concentrations in coastal areas.