Succession of bacterial community structure during the early stage of biofilm development in the Antarctic marine environment
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- Succession of bacterial community structure during the early stage of biofilm development in the Antarctic marine environment
- Lee, Yung Mi
Cho, Kyung Hee
Kim, Eun Hye
Hong, Soon Gyu
Lee, Hong Kum
- Bacteroidetes; Pseudoalteromonas; Antarctica; Biofilm succession; Bacterial community; Pyrosequencing; Psychrophilic
- Issue Date
- Lee, Yung Mi., et al. 2015. Succession of bacterial community structure during the early stage of biofilm development in the Antarctic marine environment. Korean Journal of Microbiology, 52(1): 49-58.
- Compared to planktonic bacterial populations, biofilms have distinct bacterial community structures and play important
ecological roles in various aquatic environments. Despite their ecological importance in nature, bacterial community structure and its
succession during biofilm development in the Antarctic marine environment have not been elucidated. In this study, the succession of
bacterial community, particularly during the early stage of biofilm development, in the Antarctic marine environment was investigated by
pyrosequencing of the 16S rRNA gene. Overall bacterial distribution in biofilms differed considerably from surrounding seawater.
Relative abundance of Gammaproteobacteria and Bacteroidetes which accounted for 78.9？88.3% of bacterial community changed
drastically during biofilm succession. Gammaproteobacteria became more abundant with proceeding succession (75.7% on day 4) and
decreased to 46.1% on day 7. The relative abundance of Bacteroidetes showed opposite trend to Gammaproteobacteria, decreasing from
the early days to the intermediate days and becoming more abundant in the later days. There were striking differences in the composition
of major OTUs (≥ 1%) among samples during the early stages of biofilm formation. Gammaproteobacterial species increased until day 4,
while members of Bacteroidetes, the most dominant group on day 1, decreased until day 4 and then increased again. Interestingly,
Pseudoalteromonas prydzensis was predominant, accounting for up to 67.4% of the biofilm bacterial community and indicating its
important roles in the biofilm development.
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