Spatial patchiness of plankton enhances fishery production and carbon export in the ocean. While diel vertical migration (DVM) has been identified as an important factor contributing to vertical patchiness, its effect on horizontal patchiness has never been investigated. We use a simple individual-based zooplankton model to examine the effect of DVM on the horizontal patchiness of four zooplankton groups with differing DVM patterns in a two-dimensional ocean circulation model. We find that zooplankton horizontal patchiness can be induced by two mechanisms: (1) in stratified waters, DVM can synchronize zooplankton vertical positions with the horizontal current velocities that drive them, resulting in horizontal patchiness; and (2) migrating zooplankton tend to aggregate in deep waters when they encounter sea bottom. Due to these mechanisms, zooplankton horizontal patchiness may be ubiquitous in the ocean, enhancing secondary production and fisheries.

中文翻译：

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Diel垂直迁移促进浮游动物水平斑块

浮游生物的空间斑块状增强了海洋中的渔业生产和碳输出。虽然已将 DVM 确定为导致垂直斑块的重要因素，但从未研究过它对水平斑块的影响。我们使用一个简单的基于个体的浮游动物模型来检查 DVM 对二维海洋环流模型中具有不同 DVM 模式的四个浮游动物群的水平斑块的影响。我们发现浮游动物水平斑块可以由两种机制引起：（1）在分层水域中，DVM 可以将浮游动物垂直位置与驱动它们的水平水流速度同步，从而导致水平斑块；(2) 迁徙的浮游动物遇到海底时往往会聚集在深水区。由于这些机制，