Diversity of bacterioplankton in the surface seawaters of Drake Passage near the Chinese Antarctic station

文献类型： 外文期刊

第一作者： Xing, Mengxin

作者： Xing, Mengxin;Li, Zhao;Wang, Wei;Sun, Mi

作者机构：

关键词： Antarctic;Drake Passage;bacterial diversity;surface seawater;16S rRNA

期刊名称：FEMS MICROBIOLOGY LETTERS （ 影响因子：2.742； 五年影响因子：2.856 ）

ISSN： 0378-1097

年卷期： 2015 年 362 卷 14 期

页码：

收录情况： SCI

摘要： The determination of relative abundances and distribution of different bacterial groups is a critical step toward understanding the functions of various bacteria and its surrounding environment. Few studies focus on the taxonomic composition and functional diversity of microbial communities in Drake Passage. In this study, marine bacterioplankton communities from surface seawaters at five locations in Drake Passage were examined by 16S rRNA gene sequence analyses. The results indicated that psychrophilic bacteria were the most abundant group in Drake Passage, and mainly made up of Bacillus, Aeromonas, Psychrobacter, Pseudomonas and Halomonas. Diversity analysis showed that surface seawater communities had no significant correlation with latitudinal gradient. Additionally, a clear difference among five surface seawater communities was evident, with 1.8% OTUs (only two) belonged to Bacillus consistent across five locations and 71% OTUs (80) existed in only one location. However, the few cosmopolitans had the largest population sizes. Our results support the hypothesis that the dominant bacterial groups appear to be analogous between geographical sites, but significant differences may be detected among rare bacterial groups. The microbial diversity of surface seawaters would be liable to be affected by environmental factors.

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