Cultivation-dependent analysis of the microbial diversity associated with the seagrass meadows in Xincun Bay, South China Sea
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Microbial communities have largely existed in the seagrass meadows. A total of 496 strains of the bacteria in the seagrass meadows, which belonged to 50 genera, were obtained by the plate cultivation method from three sites of Xincun Bay, South China Sea. The results showed that Bacillales and Vibrionales accounted for the highest proportions of organisms in all communities. The diversity of the bacteria in the sediment was higher than that associated with seagrass. Thalassia hemperichii possessed the highest abundance of bacteria, followed by Enhalus acoroides and Cymodocea rotundata. Robust seasonal dynamics in microbial community composition were also observed. It was found that microbial activities were closely tied to the growth stage of the seagrass. The microbial distribution was the lowest in site 3. The abundance of the bacteria was linked to the interactions between bacteria and plants, the condition of plant and even the coastal water quality and the nutrition level in the sediment.
KeywordsSouth China Sea Xincun Bay The seagrass meadows Bacteria 16S rRNA gene Cultivation
This research was supported by the National Natural Science Foundation of China (No.41276113, No.41276114, No.41006069, No.41406191 and No. 41430966), the National High Technology Research and Development Program of China (No.2012AA092104, No.2013AA092901 and No.2013AA092902), the Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDA11020202), the Science and technology cooperation projects of Sanya (No.2013YD74), and the Sanya Station Database and the Information System of CERN, the Knowledge Innovation Program of the Chinese Academy of Sciences (No.SQ201218), the Open Fund of Key Laboratory for Ecological Environment in Coastal Areas, State Oceanic Administration (No.201304).
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Conflict of interest
The authors declare that they have no conflict of interest.
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