湿地研究
Online ISSN : 2434-1762
Print ISSN : 2185-4238
渡良瀬遊水地における重金属が微生物叢に与える影響
鈴木 伸洋荒川 理彩田口 尚幸Sim JOONGEUN桂島 沙也加清野 華子宇野 永里子木村 信忠木川田 喜一神澤 信行齊藤 玉緒
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ジャーナル オープンアクセス

2020 年 10 巻 p. 37-46

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Approximately 100 years ago, contaminated water from the Ashio Copper Mine in Japan spilled out frequently during floods and caused the detrimental effects on surrounding areas. Currently, situations of the heavy metal contamination have been improved due to the recent activities of the government, NPOs and citizen volunteers. However, high amount of heavy metals can be still detected and effects of these heavy metals on organisms are still not clear around the Watarase Retarding Basin. In this study, we investigated the effects of heavy metals on the microbial compositions in the Watarase Retarding Basin. Measurement of heavy metals extracted from the soils sampled at different spots demonstrated that the soil from the previously contaminated spot showed higher level of various heavy metals compared to other spots. In addition, in this spot, soil bacterial composition was changed drastically, indicating that the bacterial communities were affected by the presence of heavy metals in the soil. Especially, Acidobacteria which was reported to exist in chemically polluted areas was abundant. It should be the first report that revealed the effects of heavy metals on microorganisms in the Watarase Retarding Basin.

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