Despite suggestions that turbulence can affect the migration of zooplankton, field observations of such effects are scarce. This is especially the case for bottom‐associated (demersal) zooplankton that reside in the typically turbulent near‐bottom environment. Using moored sensors deployed at two coastal sites in the North Pacific and the Red Sea, we present observations of the effects of turbulence on the nocturnal emergence of demersal zooplankton. A cabled observatory consisting of a plankton camera, an acoustic current profiler and environmental sensors, was deployed near bottom in 20 m of water near Oshima Island, Japan. Observations were also obtained from a second site near a coral reef in 16 m of water in the Red Sea. Acoustic backscatter data obtained from current profilers at both sites provided a proxy for zooplankton density. Combined with simultaneous estimates of turbulence intensity, the observations suggest that the nocturnal emergence of demersal zooplankton was hindered by elevated levels of turbulence. While our findings are inferred from acoustic data, agreement between the two different sites supports our hypothesis that demersal zooplankton may remain near the bed during times of strong turbulence.

中文翻译：

---

湍流在调节浮游浮游动物迁移中的潜在作用

尽管有人认为湍流会影响浮游动物的迁移，但对这种影响的实地观察却很少。底部相关的（浮游式）浮游动物在通常动荡的近底部环境中尤为如此。我们使用部署在北太平洋和红海两个沿海地点的系泊传感器，观察了湍流对浮游动物浮游性夜间活动的影响。在日本大岛附近的20 m水中底部附近部署了一个由浮游生物照相机，声流剖面仪和环境传感器组成的有线天文台。还从红海16 m水中的珊瑚礁附近的第二个地点获得了观测结果。从两个地点的电流廓线仪获得的声学反向散射数据提供了浮游动物密度的替代指标。结合对湍流强度的同时估计，这些观察结果表明，水下浮游动物的夜间出现受到湍流水平升高的阻碍。虽然我们的研究结果是根据声学数据推论得出的，但两个不同地点之间的一致意见支持了我们的假设，即在强烈湍流期间，浮游动物的浮游动物可能仍留在河床附近。