赣江南昌段丰水期细菌群落特征

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Abstract

Bacteria are key players in the ecosystem of rivers. In this study, bacterial communities in Nanchang section of the Ganjiang River in wet season (April to Auguest) were analyzed. The results showed that the dominant phyla were Actinobacteria (41.18%) and Proteobacteria (31.79%), followed by Firmicutes (10.04%), Bacteroidetes (7.26%) and Cyanobacteria (4.01%). The dominant genus was hgcI_clade (16.39%). There were no significant differences of the bacterial community abundance and diversity in river water between the upstream, the downtown and the downstream of urban area, while there were significant differences between months. Except for Proteobacteria and Verrucomicrobia, there was significant difference of the bacterial phyla abundance between months. Proteobacteria (mainly Betaproteobacteria) was the only phylum whose abundance showed significant difference between sampling sites. Temperature and streamflow were the main environmental factors influencing bacterial communities in river water, while temperature was more correlated with the bacterial Operational Taxonomic Unit (OTU), and streamflow was more correlated with bacterial phyla communities. Firmicutes became the dominant phylum instead of Actinobacteria and Proteobacteria in a stormflow. The optimal subset of environmental variables with the best correlation to OTU abundance included temperature, flow rate and EC, and with the best correlation to phylum abundance included temperature and flow rate. The influence of water chemical parameters on bacterial communities was less than that of hydrometeorological factors including temperature and streamflow.

Key words： Nanchang section of the Ganjiang River high throughput sequencing bacterial community structure environmental factors

Received: 11 December 2015

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	Articles by authors
	WANG Peng
	CHEN bo
	LI Chuang-qiong
	LI Yan

Cite this article:

WANG Peng,CHEN bo,LI Chuang-qiong等. Bacterial communities in Nanchang section of the Ganjiang River in wet seaon[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(8): 2453-2462.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2016/V36/I8/2453

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