Comparison of Prokaryotic Communities Associated with Different TOC Concentrations in Dianchi Lake

The effect of total organic carbon (TOC) on the prokaryotic community structure in situ has been rarely known. This study aimed to determine the effect of TOC level on the composition and networks of archaeal and bacterial communities in the sediments of Dianchi Lake, one of the most eutrophic lakes...

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Bibliographic Details
Published in:Water (Basel) 2020-09, Vol.12 (9), p.2557
Main Authors: Li, Cheng-Peng, Li, Ya-Ping, Huo, Qing-Qing, Xiao, Wei, Duan, Chang-Qun, Wang, Yong-Xia, Cui, Xiao-Long
Format: Article
Language:English
Subjects:
Bacteria
Community structure
Deoxyribonucleic acid
Discriminant analysis
Dissolved organic carbon
Distribution
DNA
Ecosystems
Environmental aspects
Eutrophic lakes
Eutrophication
Geography
Identification and classification
Laboratories
Lake sediments
Lakes
Measurement
Microorganisms
Nitrogen
Organic carbon
Prokaryotes
Sediments
Taxonomy
Testing
Total organic carbon
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Summary:The effect of total organic carbon (TOC) on the prokaryotic community structure in situ has been rarely known. This study aimed to determine the effect of TOC level on the composition and networks of archaeal and bacterial communities in the sediments of Dianchi Lake, one of the most eutrophic lakes in China. Microbial assemblages showed significantly associations with TOC. Moreover, relatively high and low TOC formed taxonomic differences in prokaryotic assemblages. According to the results, the most abundant bacteria across all samples were identified as members of the phyla Proteobacteria, Nitrospirae, Chloroflexi, Firmicutes and Ignavibacteriae. The dominant groups of archaea consisted of Euryarchaeota, Woesearchaeota DHVEG-6, Bathyarchaeota and WSA2. Lastly, the meta-analysis results highlighted that the low TOC (LT) prokaryotic community structure is larger and more complex compared to moderate TOC (MT). On the whole, the prokaryotic community structure is obviously distinct among groups with different TOC levels, and LT communities may interact with each other strongly in the Dianchi Lake sediment. This study can provide more insights into prokaryotic assemblages in eutrophic lake sediment and provide suggestions for the restoration and maintenance of sediment ecosystems.
ISSN:2073-4441
2073-4441
DOI:10.3390/w12092557