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首页> 外文期刊>Journal of oceanography >Depth-dependent and seasonal variability in archaeal community structure in the subarctic and subtropical western North Pacific
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Depth-dependent and seasonal variability in archaeal community structure in the subarctic and subtropical western North Pacific

机译：北太平洋亚热带和亚热带西部古细菌群落结构的深度依赖性和季节性变化

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摘要

Archaea represent an important component of marine picoplankton. Marine archaeal communities are generally dominated by Marine Group I (MGI) and Marine Group II (MGII), which are affiliated to the phyla Thaumarchaeota and Euryarchaeota. We used pyrosequencing-based analysis of archaeal 16S rRNA genes to investigate archaeal community composition throughout the water column (0–5000?m) at the subarctic (station K2) and subtropical (station S1) stations in western North Pacific. Sampling was conducted on four occasions between 2010 and 2011 to examine seasonal variability in community composition. Four phylogenetic groups (MGI-α, MGI-γ, MGII-α, and MGII-β) belonging to Thaumarchaeota and Euryarchaeota were found throughout the water column, but the relative abundance of each group varied depending on depth. In the surface water, archaeal communities displayed marked seasonal variability at both stations, whereas in deeper waters (300–5000?m), temporal variability in community composition was less evident. Sequences similar to those of the uncultured Marine Benthic Group A, to date found only in marine sediments, were detected throughout the water column at station S1.
机译：古细菌代表着海洋浮游生物的重要组成部分。海洋古生菌群落通常由隶属于门氏菌属Thaumarchaeota和Euryarchaeota的海洋I类（MGI）和海洋II类（MGII）主导。我们使用基于焦磷酸测序的古细菌16S rRNA基因分析研究了北太平洋西部亚北极（K2站）和亚热带（S1站）整个水柱（0–5000？m）中的古细菌群落组成。在2010年至2011年期间，共进行了四次抽样调查，以调查社区组成的季节性变化。在整个水柱中发现了属于Thaumarchaeota和Euryarchaeota的四个系统发育组（MGI-α，MGI-γ，MGII-α和MGII-β），但是每个组的相对丰度随深度而变化。在地表水中，古细菌群落在两个站均表现出明显的季节性变化，而在较深的水域（300-5000？m）中，群落组成的时间变化则不太明显。迄今为止，仅在海洋沉积物中发现了与未养殖的海洋底栖动物A组相似的序列，在S1站的整个水柱中都可检测到。

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