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首页> 外文期刊>Science of the total environment >In situ observations and modelling revealed environmental factors favouring occurrence of Vibrio in microbiome of the pelagic Sargassum responsible for strandings
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In situ observations and modelling revealed environmental factors favouring occurrence of Vibrio in microbiome of the pelagic Sargassum responsible for strandings

机译：原位观察和建模揭示了对绞线负责的骨质纱线微生物组中的弧菌发生的环境因素

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摘要

Historically, pelagic Sargassum were only found in the Sargasso Sea. Since 2011, blooms were regularly observed in warmer water, further south. Their developments in Central Atlantic are associated with mass strandings on the coasts, causing important damages and potentially dispersion of new bacteria. Microbiomes associated with pelagic Sargassum were analysed at large scale in Central Atlantic and near Caribbean Islands with a focus on pathogenic bacteria. Vibrio appeared widely distributed among pelagic Sargassum microbiome of our samples with higher occurrence than previously found in Mexico Gulf. Six out the 16 Vibrio-OTUs (Operational Taxo-nomic Unit), representing 81.2 ± 13.1% of the sequences, felt in cluster containing pathogens. Among the four different microbial profiles of pelagic Sargassum microbiome. Vibrio attained about 2% in two profiles whereas it peaked, in the two others, at 6.5 and 26.8% respectively, largely above the concentrations found in seawater surrounding raft (0.5%). In addition to sampling and measurements, we performed backward Lagrangian modelling of trajectories of rafts, and rebuilt the sampled rafts environmental history allowing us to estimate Sargassum growth rates along raft displacements. We found that Vibrio was favoured by high Sargassum growth rate and in situ ammonium and nitrite, modelled phosphate and nitrate concentrations, whereas zooplankters, benthic copepods, and calm wind (proxy of raft buoyancy near the sea surface) were less favourable for them. Relations between Vibrio and other main bacterial groups identified a competition with Alteromonas. According to forward Lagrangian tracking, part of rafts containing Vibrio could strand on the Caribbean coasts, however the strong decreases of modelled Sargassum growth rates along this displacement suggest unfavourable environment for Vibrio. For the conditions and areas observed, the sanitary risk seemed in consequence minor, but in other areas or conditions where high Sargassum growth rate occurred near coasts, it could be more important.
机译：从历史上看，Pelagic Sargassum只在Sargasso海中被发现。自2011年以来，在温暖的水中经常观察到盛开，进一步南方。他们在中部大西洋的发展与海岸的大众绞线相关联，导致新细菌的重要损害和可能分散。在中西部的中央大西洋和加勒比群岛附近的大规模分析了与骨质纱线相关的微生物体，重点是致病细菌。 Vibrio显得广泛分布在我们的样品中的骨质肉豆蔻微生物组中，其样品的含量高于在墨西哥湾的先前发现。六出16个vibrio-otus（运营税务税务单位），代表序列的81.2±13.1％，含有病原体的群体。在Pelagic Sargassum微生物组的四种不同微生物谱中。振动在两种型材中达到约2％，而在另外两种曲线上达到6.5％和26.8％，主要高于海水围绕筏（0.5％）的浓度。除了采样和测量外，我们还表现了筏的轨迹的落后拉格朗日建模，并重建了采样的筏环境历史，使我们沿着筏位移估计Sargassum增长率。我们发现，VIBRIO受到高Sargassum生长速率和原位铵和亚硝酸盐，模拟的磷酸盐和硝酸盐浓度的青睐，而曲柄，底栖糖果和平静的风（海面附近的筏子浮力的代理）对它们不太有利。弧菌和其他主要细菌群体之间的关系确定了与AlterOmonas的竞争。据前瞻拉格朗日追踪，含有弧菌的筏子的一部分可以在加勒比海岸上股票，然而，沿着这种位移的模型Sargassum增长率的强劲降低表明了颤音的不利环境。对于所观察到的条件和地区，卫生风险似乎是较小的，但在沿海地区附近发生高的Sargassum生长速率的其他领域或条件下，它可能更为重要。

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  • 来源
    《Science of the total environment》 |2020年第15期|141216.1-141216.10|共10页
  • 作者

    Valerie Michotey; Aurelie Blanfune; Cristele Chevalier; Marc Garel; Frederic Diaz; Leo Berline; Louis Le Grand; Fabrice Armougom; Sophie Guasco; Sandrine Ruitton; Thomas Changeux; Bruno Belloni; Jean Blanchot; Frederic Menard; Thierry Thibaut;

  • 作者单位

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

    Aix Marseille Univ. Universite de Toulon CNRS IRD MIO 13288 Marseille France;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Alteromonas; Copepod; Microbiome; Nutrient; Sargassum growth rate; Wind;

    机译：alteroMonas;桡足蛋糕;微生物组;养分;Sargassum增长率;风;

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