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	Damming river shapes distinct patterns and processes of planktonic bacterial and microeukaryotic communities
	Lu, Lunhui1; Tang, Qiong1,2; Li, Hang1; Li, Zhe1
	2022-01-12
摘要	Planktonic bacterial and microeukaryotic communities play important roles in biogeochemical cycles, but their biogeographic patterns and community assembly processes in large damming rivers still remain unclear. In this study, 16S rRNA and 18S rRNA coding genes were used for sample sequencing analysis of planktonic bacterial and microeukaryotic communities in the upper Yangtze River. The upper Yangtze River was divided into dam-affected zones and river zones based on the influence of dams. The results showed that there were significant differences in the bacterial and microeukaryotic communities between the two zones and that dams significantly reduced the alpha-diversity of the bacterial communities. Co-occurrence network analysis indicated that networks in the river zone were denser than those in the dam-affected zone. The relationships among species in bacterial networks were more complex than those in microeukaryotic networks. Dispersal limitation and ecological drift were the main processes influencing planktonic bacterial and microeukaryotic communities in the dam-affected zone respectively, whereas the role of deterministic processes increased in the river zone. Anthropogenic activities and hydraulic conditions affected suspended sediment and controlled microbial diversity in the river zone. These results suggest that dams impact planktonic bacteria more strongly than planktonic microeukaryotes, indicating that the distribution patterns and processes of the bacterial and microeukaryotic communities in large rivers are significantly different.
DOI	10.1111/1462-2920.15872
发表期刊	ENVIRONMENTAL MICROBIOLOGY
ISSN	1462-2912
页码	15
通讯作者	Li, Zhe(lizhe@cigit.ac.cn)
收录类别	SCI
WOS记录号	WOS:000741355700001
语种	英语