Structural changes of the sediment bacterial community in Meiliang Bay of Lake Taihu, China, during typhoon Morakot, 2009

Authors

  • Keqiang Shao,

    1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 Beijing East Road, Nanjing 210008, China
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
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  • Dr. Guang Gao,

    Corresponding author
    1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 Beijing East Road, Nanjing 210008, China
    • Phone: (+86) 25 86882187, Fax: (+86) 25 57714759
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  • Boqiang Qin,

    1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 Beijing East Road, Nanjing 210008, China
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  • Xiangming Tang,

    1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 Beijing East Road, Nanjing 210008, China
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  • Kexu Chi,

    1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 Beijing East Road, Nanjing 210008, China
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
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  • Xin Yao,

    1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 Beijing East Road, Nanjing 210008, China
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
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  • Jiangyu Dai

    1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 Beijing East Road, Nanjing 210008, China
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
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Abstract

We investigated changes in bacterial communities of the sediment in a large, shallow, eutrophic, freshwater Lake Taihu, China, during typhoon Morakot (August 7 to 13, 2009). Based on cluster analysis of the DGGE banding patterns, bacterial communities in different sediment samples were very similar to each other. However, samples from the middle period of the typhoon were different from those of the early and late periods of the typhoon. Two bacterial groups, Bacteroidetes and Nitrospirae, rapidly appeared or increased in the sediment samples of the middle period of the typhoon, due to the strong turbulence in the water column caused by typhoon resulted in the exchange of surface sediment with a high level of organic matter with the water column, and severe disturbance to the anaerobic layer of the sediments. Redundancy analysis showed that organic matter contributed significantly to the changes in sediment bacterial communities during the typhoon. Our study demonstrated that the response of sediment bacterial communities to the typhoon event was very rapid but of short duration. (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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