Large-scale distribution patterns of virioplankton in the upper ocean
Large-scale distribution patterns of virioplankton in the upper ocean
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DOI：
10.3354/ame01428
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发表时间：
2010-07
影响因子：
1.4
通讯作者：
Yanhui Yang;C. Motegi;T. Yokokawa;T. Nagata
中科院分区：
文献类型：
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作者：
Yanhui Yang;C. Motegi;T. Yokokawa;T. Nagata
我们使用流式细胞仪来调查大规模的分布模式的病毒及其亚群在上200米水柱的中太平洋和南大洋的太平洋部门。聚球藻属、微真核生物和原绿球藻属3类光合自养微型浮游生物（APP）的丰度对病毒丰度的变异性有较大贡献（r2 = 0.530，n = 354，p < 0.001）。具有高荧光强度（HV）的病毒亚群的相对贡献随着APP丰度的增加而增加。这些数据与感染APP的病毒是丰富的这一概念是一致的，HV亚群可能包含大量的这些病毒，特别是在亚热带和热带海洋。病毒丰度和生物变量之间的关系各区域不同，表明病毒宿主系统的控制在不同的海洋区域之间有很大的不同。我们在北太平洋中纬度地区发现了一个明显的病毒丰度高峰。这一“病毒热点”与溶解氧异常（超过饱和度）相一致，其表现为表观氧利用率的负值（-15至-59 μmol kg-1）。我们的研究结果支持的概念，大规模的分布模式的病毒和它们的亚群在上层海洋的主机分布和物理过程的综合效应的影响。
We used flow cytometry to investigate large-scale distribution patterns of viruses and their subclusters in the upper 200 m water column of the central Pacific Ocean and the Pacific sector of the Southern Ocean. The abundances of 3 groups of photoautotrophic picoplankton (APP), including Synechococcus, picoeukaryotes, and Prochlorococcus, accounted for a large fraction of viral abundance variability (r 2 = 0.530, n = 354, p < 0.001). The relative contribution of the viral subcluster with high fluorescence intensity (HV) increased with increasing abundance of APP. These data are consistent with the notion that viruses infecting APP are abundant, and the HV subcluster might contain large numbers of these viruses especially in subtropical and tropical oceans. Relationships between viral abundance and biotic variables differed among regions, indicating that controls of virus-host systems are largely distinct among different oceanic regions. We found a conspicuous peak of viral abundance in the mid-latitude region of the North Pacific. This 'viral hot spot' coincided with a dissolved oxygen anomaly (the excess above saturation) indicated by negative values (-15 to -59 μmol kg -1 ) of apparent oxygen utilization. Our results support the notion that large-scale distribution patterns of viruses and their subclusters in the upper oceans are affected by a combined effect of host distributions and physical processes.