Biological proliferation of cesium-137 through the detrital food chain in a forest ecosystem in Japan.
Biological proliferation of cesium-137 through the detrital food chain in a forest ecosystem in Japan.
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DOI：
10.1038/srep03599
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发表时间：
2014-01-08
影响因子：
4.6
通讯作者：
Tanoi K
中科院分区：
文献类型：
--
作者：
Murakami M;Ohte N;Suzuki T;Ishii N;Igarashi Y;Tanoi K
废弃的福岛第一核电站释放出包括 137C 在内的放射性核素，并广泛沉积在日本本州岛东北部的森林地区。在森林中，137C 高度集中在事故发生前 2010 年秋季沉积的落叶层中。对 137C 在功能组中分布的监测清楚地表明了碎屑食物链作为 137C 转移到消费生物体的主要渠道的作用。尽管许多研究报告了放射性物质通过营养相互作用的生物累积（或稀释），但目前的结果强调了检查 137C 通过食物网扩散的多种可能途径（例如放牧与碎屑链）的重要性。这些结果为了解 137C 在森林生态系统中的未来分布和转移提供了重要的见解。
Radionuclides, including 137Cs, were released from the disabled Fukushima Daiichi Nuclear Power Plant and had been deposited broadly over forested areas of north-eastern Honshu Island, Japan. In the forest, 137Cs was highly concentrated on leaf litters deposited in autumn 2010, before the accident. Monitoring of the distribution of 137Cs among functional groups clearly showed the role of the detrital food chain as the primary channel of 137Cs transfer to consumer organisms. Although many studies have reported the bioaccumulation (or dilution) of radioactive materials through trophic interactions, the present results highlight the importance of examining multiple possible pathways (e.g., grazing vs. detrital chains) in the proliferation of 137Cs through food webs. These results provide important insight into the future distribution and transfer of 137Cs within forest ecosystems.