Exploring microbial diversity and ecological function of epiphytic and surface sediment biofilm communities in a shallow tropical lake

Microbial communities in epiphytic biofilms and surface sediments play a vital role in the biogeochemical cycles of the major chemical elements in freshwater. However, little is known about the diversity, composition, and ecological functions of microbial communities in shallow tropical lakes domina...

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Bibliographic Details
Published in:The Science of the total environment 2022-02, Vol.808, p.151821-151821, Article 151821
Main Authors: Manirakiza, Benjamin, Zhang, Songhe, Addo, Felix Gyawu, Isabwe, Alain, Nsabimana, Antoine
Format: Article
Language:English
Subjects:
Bacteria - genetics
Biofilms
Eukaryota
Geologic Sediments
Lake Rumira
Lakes
Macrophytes
Microbial community
Microbiota
Surface sediments
Tropical lacustrine ecosystem
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Summary:Microbial communities in epiphytic biofilms and surface sediments play a vital role in the biogeochemical cycles of the major chemical elements in freshwater. However, little is known about the diversity, composition, and ecological functions of microbial communities in shallow tropical lakes dominated by aquatic macrophytes. In this study, epiphytic bacterial and eukaryotic biofilm communities on submerged and floating macrophytes and surface sediments were investigated in Lake Rumira, Rwanda in August and November 2019. High-throughput sequencing data revealed that members of the phyla, including Firmicutes, Proteobacteria, Cyanobacteria, Actinobacteria, Chloroflexi, Bacteriodetes, Verrumicrobia, and Myxomycota, dominated bacterial communities, while the microeukaryotic communities were dominated by Unclassified (uncl) SAR(Stramenopiles, Alveolata, Rhizaria), Rotifers, Ascomycota, Gastrotricha, Platyhelminthes, Chloroplastida, and Arthropoda. Interestingly, the eukaryotic OTUs (operational taxonomic units) number and Shannon indices were significantly higher in sediments and epiphytic biofilms on Eicchornia crassipes than Ceratophyllum demersum (p  0.7, p 
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2021.151821