Diel vertical migration of Arctic zooplankton during the polar night
Diel vertical migration of Arctic zooplankton during the polar night
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DOI：
10.1098/rsbl.2008.0484
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发表时间：
2009-02-23
期刊：
影响因子：
3.3
通讯作者：
Brierley, Andrew S.
中科院分区：
文献类型：
--
作者：
Berge, Jorgen;Cottier, Finlo;Brierley, Andrew S.
高纬度环境显示出物理和生物变量的极端季节性变化。北极海洋生态系统的经典范例认为，大多数生物过程在极夜期间减缓或停止。通常认为在冬季停止的一个关键过程是浮游动物的昼夜垂直迁移（DVM）。DVM是地球上最大的生物量同步运动，对海洋生态系统功能和碳循环至关重要。在这里，我们提出的声学数据，表明在整个北极冬季，在开放和冰覆盖的沃茨的浮游动物的同步DVM行为。我们认为，即使在极夜，DVM是受昼夜变化的太阳和月球照明，这是在强度远远低于人类感知的阈值。我们还表明，冬季DVM是更强的开放沃茨相比，冰覆盖的沃茨。这表明，如果北极冬季海冰覆盖持续消退，生物介导的碳垂直通量将会增加。
High-latitude environments show extreme seasonal variation in physical and biological variables. The classic paradigm of Arctic marine ecosystems holds that most biological processes slow down or cease during the polar night. One key process that is generally assumed to cease during winter is diel vertical migration (DVM) of zooplankton. DVM constitutes the largest synchronized movement of biomass on the planet, and is of paramount importance for marine ecosystem function and carbon cycling. Here we present acoustic data that demonstrate a synchronized DVM behaviour of zooplankton that continues throughout the Arctic winter, in both open and ice-covered waters. We argue that even during the polar night, DVM is regulated by diel variations in solar and lunar illumination, which are at intensities far below the threshold of human perception. We also demonstrate that winter DVM is stronger in open waters compared with ice-covered waters. This suggests that the biologically mediated vertical flux of carbon will increase if there is a continued retreat of the Arctic winter sea ice cover.