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The heterogeneity of composition and assembly processes of the microbial community between different nutrient loading lake zones in Taihu Lake

  • Environmental biotechnology
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Abstract

To investigate the differences in the microbial community composition and assembly process in two lake zones (Meiliang Bay (MLB) and Xukou Bay (XKB) in Taihu Lake, China) with different nutrient loadings, water samples were collected. Both the 16S ribosomal RNA (rRNA) gene for the bacterial community and the 18S rRNA gene for the microeukaryote community were investigated using the Illumina second-generation sequencing platform (2 × 250 paired-end). The results indicated that both the bacterioplankton and microeukaryote community composition derived from the two lake zones were significantly different. Significantly higher operational taxonomic unit (OTU) richness (P < 0.01) and phylogenetic diversity (P < 0.05) were found for the bacterioplankton community of MLB. However, a comparable alpha diversity was found between the microeukaryote communities of MLB and XKB (P > 0.05). Environmental factors significantly affected the community compositions in XKB for both the bacterioplankton and microeukaryotes. However, they did not significantly influence the microbial community composition in MLB, except for a weak correlation between dissolved organic carbon (DOC) and the microeukaryote community. The microbial communities tended to be more phylogenetically clustered than expected by chance in the two lake zones. Moreover, the results of the phylogenetic structure suggest that deterministic processes played overwhelming roles in driving the assembly of both the bacterioplankton and microeukaryote community in XKB.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (41371098, 41571108, 41671078); the National Key Technology R&D Program (2015BAD13B01); the Natural Science Foundation of Jiangsu Province, China (BK20151614); the Special Fund of the State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering (20145027312, 20155019012); the Fundamental Research Funds for the Central Universities (2015B14214); and the Qing Lan Project of Jiangsu Province.

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  1. Dayong Zhao and Xinyi Cao contributed equally to this work.

Authors and Affiliations

  1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China

    Dayong Zhao, Xinyi Cao, Rui Huang, Feng Shen, Huimin Xu, Sichen Wang, Xiaowei He & Zhongbo Yu

  2. College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China

    Dayong Zhao, Xinyi Cao, Rui Huang, Feng Shen, Huimin Xu, Sichen Wang, Xiaowei He & Zhongbo Yu

  3. Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, USA

    Dayong Zhao

  4. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China

    Xinyi Cao, Rui Huang, Jin Zeng, Feng Shen, Huimin Xu, Sichen Wang & Xiaowei He

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  1. Dayong Zhao
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Contributions

Dayong Zhao, Jin Zeng, and Zhongbo Yu designed the experiments. Dayong Zhao, Xinyi Cao, Rui Huang, Jin Zeng, Sichen Wang, and Huimin Xu did the field sampling. Huimin Xu and Xiaowei He did the analysis of the water characteristics. Dayong Zhao, Xinyi Cao, and Jin Zeng was responsible for the performance of the molecular experiments. Dayong Zhao, Xinyi Cao, Rui Huang, Jin Zeng, and Feng Shen did the data analysis. Dayong Zhao, Xinyi Cao, Jin Zeng, Huimin Xu, and Zhongbo Yu wrote the paper. Dayong Zhao, Xinyi Cao, Jin Zeng, and Zhongbo Yu revised the paper.

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Zhao, D., Cao, X., Huang, R. et al. The heterogeneity of composition and assembly processes of the microbial community between different nutrient loading lake zones in Taihu Lake. Appl Microbiol Biotechnol 101, 5913–5923 (2017). https://doi.org/10.1007/s00253-017-8327-0

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