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首页> 外文期刊>Estuarine Coastal and Shelf Science >Freshwater prokaryote and virus communities can adapt to a controlled increase in salinity through changes in their structure and interactions
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Freshwater prokaryote and virus communities can adapt to a controlled increase in salinity through changes in their structure and interactions

机译：淡水原核生物和病毒群落可以通过改变其结构和相互作用来适应盐度的受控增加

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摘要

Little information exists on the ecological adaptive responses of riverine microorganisms to the salinity changes that typically occur in transitional waters. This study examined the precise effects of a gradual increase in salinity (+3 units per day for 12 days) on freshwater virus and prokaryote communities collected in the Red River Delta (northern Vietnam). The abundance, activity, morphology and diversity of both communities were examined along this simulated salinity gradient (0-36). Three main successive ecological stages were observed: (1) a continuous decline in prokaryotic and viral abundance from the start of the salinization process up to salinity 12-15 together with a strong decrease in the proportion of active cells, (2) a shift in both community compositions (salinity 9-15) and (3) a marked prevalence of lysogenic over lytic cycles up to salinity 21 followed by a collapse of both types of viral infection. Finally, after salinity 21, and up to seawater salinities (i.e. 36) the prokaryotic community showed multiple signs of recovery with their abundance and function even reaching initial levels. These results suggest that most of the physiological and phylogenetic changes that occurred within the salinity range 10-20 seemed to favor the installation of osmotically adapted prokaryotes accompanied by a specific cortege of viral parasites which might both be able to survive and even proliferate in saltwater conditions.
机译：关于河流微生物对通常在过渡水域中发生的盐度变化的生态适应性响应的信息很少。这项研究检查了盐度逐渐增加（每天增加3个单位，共12天）对红河三角洲（越南北部）收集的淡水病毒和原核生物群落的精确影响。沿该模拟盐度梯度（0-36）检查了两个群落的丰度，活性，形态和多样性。观察到三个主要的连续生态阶段：（1）从盐碱化过程开始到盐度12-15，原核生物和病毒丰度持续下降，同时活性细胞比例大幅下降，（2）这两个群落组成（盐度9-15）和（3）溶菌性在直至盐度21的裂解周期中均显着盛行，随后这两种病毒感染都崩溃了。最后，在盐度21之后，直至海水盐度​​（即36），原核生物群落都显示出多种恢复迹象，它们的丰度和功能甚至达到初始水平。这些结果表明，在盐度10-20范围内发生的大多数生理和系统发育变化似乎都倾向于安装渗透适应性原核生物，并伴有特定的病毒寄生虫皮质，这些病毒寄生虫既可以在盐水条件下生存甚至繁殖。 。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2013年第20期|58-66|共9页
  • 作者

    Combe Marine; Bouvier Thierry; Pringault Olivier; Rochelle-Newall Emma; Bouvier Corinne; Agis Martin; Pham The Thu; Torreton Jean-Pascal; Chu Van Thuoc; Yvan Bettarel;

  • 作者单位

    UMR 5119 ECOSYM, Universite Montpellier 2, CNRS, IRD, Place E. Bataillon, CC093, 34095 Montpellier cedex 05, France;

    UMR 5119 ECOSYM, Universite Montpellier 2, CNRS, IRD, Place E. Bataillon, CC093, 34095 Montpellier cedex 05, France;

    UMR 5119 ECOSYM, Universite Montpellier 2, CNRS, IRD, Place E. Bataillon, CC093, 34095 Montpellier cedex 05, France;

    UMR 7618 BIOEMCO, IRD, Ecole Normale Superieur, 46 rue d'Ulm, Paris France;

    UMR 5119 ECOSYM, Universite Montpellier 2, CNRS, IRD, Place E. Bataillon, CC093, 34095 Montpellier cedex 05, France;

    UMR 5119 ECOSYM, Universite Montpellier 2, CNRS, IRD, Place E. Bataillon, CC093, 34095 Montpellier cedex 05, France;

    Institute of Marine Environment and Resources (IMER), Vietnam Academy of Science and Technology (VAST), Haiphong, Viet Nam;

    UMR 5119 ECOSYM, Universite Montpellier 2, CNRS, IRD, Place E. Bataillon, CC093, 34095 Montpellier cedex 05, France;

    Institute of Marine Environment and Resources (IMER), Vietnam Academy of Science and Technology (VAST), Haiphong, Viet Nam;

    UMR 5119 ECOSYM, Universite Montpellier 2, CNRS, IRD, Place E. Bataillon, CC093, 34095 Montpellier cedex 05, France,IRD, Van Phuc Diplomatic Compound, 298, Kim Ma, Hanoi, Viet Nam;

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  • 正文语种 eng
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  • 关键词

    virus; prokaryote; salinity; microbial ecology; estuaries; lysogeny; tropical aquatic ecosystems;

    机译：病毒;原核生物盐度;微生物生态学河口溶原性热带水生生态系统;

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