PDF(Pubmed)
Abstract：
In mesoscale eddies, the chemical properties and biological composition are different from those in the surrounding water due to their unique physical processes. The mechanism of physical-biological coupling in warm-core eddies is unclear, especially because no studies have examined the effects of environmental factors on bacteria and viruses. The purpose of the present study was to examine the influence of an anticyclonic warm eddy on the relationship between bacterial and viral abundances, as well as viral activity (viral production), at different depths. At the core of the warm eddy, the bacterial abundance (0.48 to 2.82 × 105 cells mL-1) fluctuated less than that outside the eddy (1.12 to 7.03 × 105 cells mL-1). In particular, there was a four-fold higher viral-bacterial abundance ratio (VBR) estimated within the eddy, below the layer of the deep chlorophyll maximum, than outside the eddy. An anticyclonic warm eddy with downwelling at its center may contribute to viruses being transmitted directly into the deep ocean through adsorption on particulate organic matter while sinking. Overall, our findings provide valuable insights into the interaction between bacterial and viral abundances and their ecological mechanisms within a warm eddy.
摘要：
在中尺度涡流中，由于其独特的物理过程，其化学特性和生物组成与周围水中的不同。热核涡流中物理-生物耦合的机制尚不清楚，特别是因为没有研究检查环境因素对细菌和病毒的影响。本研究的目的是研究反气旋温涡对细菌和病毒丰度之间关系的影响，以及病毒活性（病毒生产），在不同的深度。在温暖的漩涡的核心，细菌丰度（0.48至2.82×105细胞mL-1）的波动小于涡流外的细菌丰度（1.12至7.03×105细胞mL-1）。特别是,在涡流中估计有四倍的病毒-细菌丰度比（VBR），在深层叶绿素最大值的下面，比外面的涡流。反气旋的温暖涡流在其中心向下流动，可能会导致病毒在下沉时通过吸附在颗粒状有机物上而直接传播到深海。总的来说,我们的发现为细菌和病毒丰度之间的相互作用以及它们在温暖涡流中的生态机制提供了有价值的见解。
