UMR 5119, ECOSYM - Ecologie des systèmes marins côtiers (UM2, CNRS, IRD, Ifremer, UM1), Université Montpellier 2, Place Eugène Bataillon, Case 093, 34095 Montpellier Cedex 5, France.
Mar Pollut Bull. 2012;65(10-12):506-15. doi: 10.1016/j.marpolbul.2012.01.001. Epub 2012 Jan 28.
This study examined the distribution of virioplankton and bacterioplankton in two coral reef systems (Ahe and Takaroa atolls) in the Tuamotu Archipelago, in comparison with the surrounding oligotrophic ocean. Mean concentrations of 4.8×10(5) and 6.2×10(5) cells ml(-1) for bacteria and 8.1×10(6) and 4.3×10(6) VLP(virus-like particle) ml(-1) were recorded in Ahe and Takaroa lagoons, respectively. Chlorophyll-a concentrations and dissolved organic matter were higher in Ahe whereas (3)H thymidine incorporation rates were higher in Takaroa. First data on lytic and lysogenic strategies of phages in coral reef environments were discussed in this paper. The fraction of visibly infected cells by viruses was negligible regardless of the lagoon station (mean=0.15%). However, the fraction of lysogenic cells ranged between 2.5% and 88.9%. Our results suggest that the distribution patterns of virioplankton are apparently not coupled to the spatial dynamics of the bacterioplankton communities.
本研究比较了图阿莫图群岛的两个珊瑚礁系统（阿赫和塔卡罗阿环礁）与周围贫营养海洋中的病毒浮游生物和细菌浮游生物的分布。在阿赫和塔卡罗阿泻湖分别记录到细菌的平均浓度为 4.8×10(5) 和 6.2×10(5) 细胞/ml，病毒样颗粒（VLP）的平均浓度为 8.1×10(6) 和 4.3×10(6) VLP/ml。阿赫的叶绿素-a 浓度和溶解有机物质较高，而塔卡罗阿的（3）H 胸腺嘧啶掺入率较高。本文讨论了珊瑚礁环境中噬菌体的裂解和溶源策略的首次数据。病毒感染的可见细胞分数无论在泻湖站如何都微不足道（平均值=0.15%）。然而，溶源细胞的分数在 2.5%至 88.9%之间。我们的结果表明，病毒浮游生物的分布模式显然与细菌浮游生物群落的空间动态无关。
