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Analysis of bacterial and archaeal diversity in coastal microbial mats using massive parallel 16S rRNA gene tag sequencing.

机译：使用大规模并行16S rRNA基因标签测序分析沿海微生物垫中的细菌和古细菌多样性。

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摘要

Coastal microbial mats are small-scale and largely closed ecosystems in which a plethora of different functional groups of microorganisms are responsible for the biogeochemical cycling of the elements. Coastal microbial mats play an important role in coastal protection and morphodynamics through stabilization of the sediments and by initiating the development of salt-marshes. Little is known about the bacterial and especially archaeal diversity and how it contributes to the ecological functioning of coastal microbial mats. Here, we analyzed three different types of coastal microbial mats that are located along a tidal gradient and can be characterized as marine (ST2), brackish (ST3) and freshwater (ST3) systems. The mats were sampled during three different seasons and subjected to massive parallel tag sequencing of the V6 region of the 16S rRNA genes of Bacteria and Archaea. Sequence analysis revealed that the mats are among the most diverse marine ecosystems studied so far and consist of several novel taxonomic levels ranging from classes to species. The diversity between the different mat types was far more pronounced than the changes between the different seasons at one location. The archaeal community for these mats have not been studied before and revealed a strong reaction on a short period of draught during summer resulting in a massive increase in halobacterial sequences, whereas the bacterial community was barely affected. We concluded that the community composition and the microbial diversity were intrinsic of the mat type and depend on the location along the tidal gradient indicating a relation with salinity.
机译：沿海微生物垫是小规模且基本上封闭的生态系统，其中大量不同功能的微生物负责元素的生物地球化学循环。沿海微生物垫通过稳定沉积物并启动盐沼的发展，在海岸保护和形态动力学中发挥重要作用。人们对细菌尤其是古细菌的多样性及其对沿海微生物垫的生态功能的贡献知之甚少。在这里，我们分析了沿潮汐梯度定位的三种不同类型的沿海微生物垫，它们的特征可以是海洋（ST2），微咸（ST3）和淡水（ST3）系统。在三个不同的季节对垫子进行采样，并对细菌和古细菌的16S rRNA基因的V6区进行大规模平行标签测序。序列分析表明，垫子是迄今为止研究最广泛的海洋生态系统之一，由几类新的生物分类学层级组成，从类到物种。不同垫子类型之间的多样性远比同一地点不同季节之间的变化更为明显。这些垫子的古细菌群落以前没有被研究过，并且显示出在夏季的短时间内吃水有很强的反应，导致卤细菌序列的大量增加，而细菌群落几乎没有受到影响。我们得出的结论是，群落组成和微生物多样性是垫层类型的固有特征，并且取决于潮汐梯度的位置，指示与盐度的关系。

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    Bolhuis, H.; Stal, L.J.;

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  • 年度 2011
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