Temporal and Vertical Variation in Microbial Community Composition in Response to Physicochemical Characteristics in a Water Column of Highly Eutrophied Jinhae Bay, South Korea.

Autor:	Lee J; Department of Marine Science, Incheon National University, Incheon, Republic of Korea.; Research Institute of Basic Sciences, Incheon National University, Incheon, Republic of Korea., Lim JH; Marine Environmental Impact Assessment Center, National Institute of Fisheries Science, Busan, Republic of Korea., Park J; 3BIGS, Hwaseong, Republic of Korea., Kim IN; Department of Marine Science, Incheon National University, Incheon, Republic of Korea.
Jazyk:	angličtina
Zdroj:	Journal of molecular microbiology and biotechnology [J Mol Microbiol Biotechnol] 2018; Vol. 28 (2), pp. 65-77. Date of Electronic Publication: 2018 Jun 29.
DOI:	10.1159/000489633
Abstrakt:	Microbial communities play an essential role in marine biogeochemical cycles. Physical and biogeochemical changes in Jinhae Bay, the most anthropogenically eutrophied bay on the coasts of South Korea, are well described, but less is known about the associated changes in microbial communities. Temporal and vertical variation in microbial communities at three depths (surface, middle, and bottom) at seven time points (June to December) at the J1 sampling site were investigated on the MiSeq platform based on the 16S rRNA gene. Overall, the microbial community was dominated by Proteobacteria, Cyanobacteria, and Bacteroidetes from June to November, whereas Firmicutes were dominant in December, especially in the middle and bottom layers. The results indicate that the microbial community composition strongly varied with temporal changes in the physicochemical water properties. Moreover, the community composition differed markedly between the surface and middle layers and the bottom layer in the summer, when the water column was strongly stratified and bottom water hypoxia developed. A redundancy analysis suggested a significant correlation between physicochemical variables (i.e., temperature, salinity, and oxygen concentration) and microbial community composition. This study indicates that temporal changes in water conditions and eutrophication-induced hypoxia effectively shape the structure of the microbial community. (© 2018 S. Karger AG, Basel.)
Databáze:	MEDLINE
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