太湖不同湖区冬季沉积物细菌群落多样性

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Abstract

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.

Key words： Lake Taihu high-throughput sequencing sediment bacterial community

Received: 26 June 2017

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	Articles by authors
	XUE Yin-gang
	LIU Fei
	JIANG Xiao-dong
	GENG Jin-ju
	TENG Jia-quan
	XIE Wen-li
	ZHANG Hao
	CHEN Xin-yi

Cite this article:

XUE Yin-gang,LIU Fei,JIANG Xiao-dong等. The diversity of bacterial communities in the sediment of different lake zones of Lake Taihu in winter[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(2): 719-728.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I2/719

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