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Changes in planktonic and sediment bacterial communities under the highly regulated dam in the mid-part of the Three Gorges Reservoir
Qin, Yu1; Tang, Qiong1; Lu, Lunhui2; Wang, Yuchun3,4; Izaguirre, Irina5; Li, Zhe2
2021
摘要Bacterial communities play an important role in the biogeochemical cycle in reservoir ecosystems. However, the dynamic changes in both planktonic and sediment bacterial communities in a highly regulated dam reservoir remain unclear. This study investigated the temporal distribution patterns of bacterial communities in a transition section of the Three Gorges Reservoir (TGR) using Illumina MiSeq sequencing. Results suggested that in comparison to the planktonic bacteria, sediment bacteria contributed more to the reservoir microbial communities, accounting for 97% of the 7434 OTUs. The Shannon diversity index in the water (3.22 similar to 5.68) was generally lower than that in the sediment (6.72 similar to 7.56). In the high water level period (January and March), Proteobacteria, Actinobacteria, Cyanobacteria, and Firmicutes were the most abundant phyla, whereas in the low water level period (May, July, and September), the dominant phyla were Proteobacteria, Actinobacteria, and Bacteroidetes. Sediment samples were dominated by Proteobacteria, Chloroflexi, and Acidobacteria. Principal coordinate analysis of the bacterioplankton communities showed greater sensitivity to monthly changes than that of the sediment bacterial communities. Network analysis suggested that in comparison to planktonic bacterial communities, sediment bacterial communities were more complex and stable. The linear relationship between the CH4/CO2 ratio, water level, and relative abundance of methanotrophs highlighted the potential methane-oxidizing process in the mid-part of the TGR. Moreover, the potential impact of dam regulation on the bacterial communities was revealed by the significant relationship between abundant phyla and the inflow of the TGR.
关键词Bacterial communities Water Sediment Three Gorges Reservoir Community structure
DOI10.1007/s00253-020-11047-3
发表期刊APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
ISSN0175-7598
卷号105期号:2页码:839-852
通讯作者Lu, Lunhui(lulunhui@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000605545300008
语种英语