The diversity of bacterial communities in the sediment of different lake zones of Lake Taihu in winter
XUE Yin-gang1,2, LIU Fei1, JIANG Xiao-dong1, GENG Jin-ju3, TENG Jia-quan2, XIE Wen-li2, ZHANG Hao2, CHEN Xin-yi2
1. School of environmental and safety engineering, Changzhou University, Changzhou, Jiangsu 213164, China;
2. Key Laboratory of Environmental Protection of Water Environment Biological Monitoring of Jiangsu Province, Changzhou Environmental Monitoring Center, Changzhou, Jiangsu 213001, China;
3. State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Nanjing Jiangsu 210023, China
To explore the diversity of bacterial communities in the sediment of different lake zones with varied nutrition levels in Lake Taihu in winter, the 16S rRNA gene of surficial sedimentary bacteria of 9sampling sites, including the estuary area, the lake center and the macrophyte-dominated area, was sequenced using high-throughput sequencing approach. The results showed that the species richness and evenness was the highest in the macrophyte-dominated area, moderated in the lake center, while lowest in the estuary area. The composition of bacterial communities varied among lake zones:the phyla of Nitrospirae and Acidobacteria, and the classes of Anaerolineae and Nitrospira, specifically showed significant difference among lake zones with different nutrition levels. At the phyla level, Proteobacteria, Chloroflexi, Cyanobacteria and Nitrospirae were dominant. unidentified_Chloroplast and Microcystis were dominant bacteria at the genus level in the surficial sediments of Lake Taihu in winter. Cyanobacteria and Microcystis were detected ubiquitously at all sampling sites with the highest average abundance appearing in the center of Lake. The redundancy analysis (RDA) for the relationship between bacterial communities and environmental factors revealed that the nutrition level, water temperature and pH could affect the bacterial community structure in sediment. The level of nitrate nitrogen (NO3--N) and water temperature were the major environmental factors affecting the genus of Microcystis.
薛银刚, 刘菲, 江晓栋, 耿金菊, 滕加泉, 谢文理, 张皓, 陈心一. 太湖不同湖区冬季沉积物细菌群落多样性[J]. 中国环境科学, 2018, 38(2): 719-728.
XUE Yin-gang, LIU Fei, JIANG Xiao-dong, GENG Jin-ju, TENG Jia-quan, XIE Wen-li, ZHANG Hao, CHEN Xin-yi. The diversity of bacterial communities in the sediment of different lake zones of Lake Taihu in winter. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(2): 719-728.
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