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首页> 外文期刊>The ISME journal emultidisciplinary journal of microbial ecology >Rhythmicity of coastal marine picoeukaryotes, bacteria and archaea despite irregular environmental perturbations
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Rhythmicity of coastal marine picoeukaryotes, bacteria and archaea despite irregular environmental perturbations

机译：尽管环境扰动不规则，但沿海海洋Picoeukotes的节奏性

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摘要

Seasonality in marine microorganisms has been classically observed in phytoplankton blooms, and more recently studied at the community level in prokaryotes, but rarely investigated at the scale of individual microbial taxa. Here we test if specific marine eukaryotic phytoplankton, bacterial and archaeal taxa display yearly rhythms at a coastal site impacted by irregular environmental perturbations. Our seven-year study in the Bay of Banyuls (North Western Mediterranean Sea) shows that despite some fluctuating environmental conditions, many microbial taxa displayed significant yearly rhythms. The robust rhythmicity was found in both autotrophs (picoeukaryotes and cyanobacteria) and heterotrophic prokaryotes. Sporadic meteorological events and irregular nutrient supplies did, however, trigger the appearance of less common non-rhythmic taxa. Among the environmental parameters that were measured, the main drivers of rhythmicity were temperature and day length. Seasonal autotrophs may thus be setting the pace for rhythmic heterotrophs. Similar environmental niches may be driving seasonality as well. The observed strong association between Micromonas and SAR11, which both need thiamine precursors for growth, could be a first indication that shared nutritional niches may explain some rhythmic patterns of co-occurrence.
机译：在浮游植物盛开的植物微生物中的季节性在浮游植物的繁荣中被典型观察到，最近在原核生物的社区一级研究，但很少在单个微生物分类群的规模上进行调查。在这里，我们测试特定的海洋真核植物，细菌和古出分类群是否在沿海网站上显示每年受到不规则环境扰动的沿海网站的节奏。我们在Banyuls湾（北部地中海）的七年度研究表明，尽管环境条件有一些波动，但许多微生物分类群显示出大量的年度节奏。在自触发（Picookaryotes和Cyanobacteria）和异养的原核生物中发现了鲁棒的节奏性。然而，偶发性气象事件和不规则的营养物供应触发了不太常见的非节奏分类群的外观。在测量的环境参数中，节奏性的主要驱动因素是温度和日间长度。因此，季节性自触发可以为节奏异质的速度设置。类似的环境利基也可能是驾驶季节性。观察到的Micromonas和SAR11之间的强烈关联，既需要硫胺素前体都需要增长，这可能是共享营养利基的第一个指示，可以解释一些有节奏的共同模式。

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