Predator-enhanced diel vertical migration in a planktonic dinoflagellate
Predator-enhanced diel vertical migration in a planktonic dinoflagellate
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DOI：
10.3354/meps09467
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发表时间：
2012-01-01
影响因子：
2.5
通讯作者：
Rollwagen-Bollens, Gretchen
中科院分区：
文献类型：
--
作者：
Bollens, Stephen M.;Quenette, Joel A.;Rollwagen-Bollens, Gretchen
昼夜垂直迁移（DVM）是浮游生物中常见且引人注目的行为。就甲藻而言，尽管捕食者（食草动物）的作用尚未得到充分研究，但光和营养物质均已被证明可以调节 DVM。在这里，我们报告了一项实验研究的结果，该实验使用“浮游生物迷你塔”系统来检查海洋浮游甲藻 Akashiwo sanguinea 的 DVM 行为。在桡足类捕食者（Acaria spp.）不存在和存在的情况下，A. sanguinea 都表现出明显的反向 DVM（夜间下降，白天上升）。然而，在桡足类存在的情况下，DVM 的幅度增强，为甲藻提供了与其“正常”迁徙的捕食者更大的空间距离。我们简要讨论了甲藻中捕食者增强的 DVM 的原因（线索）和生态后果。
Diel vertical migration (DVM) is a common and conspicuous behavior amongst planktonic organisms. In the case of dinoflagellates, both light and nutrients have been shown to regulate DVM, although the role of predators (grazers) has been understudied. Here we report the results of an experimental study using a system of 'plankton mini-towers' to examine the DVM behavior of the marine planktonic dinoflagellate Akashiwo sanguinea. A. sanguinea undertook a pronounced reverse DVM (down during the night, up during the day) in both the absence and presence of copepod predators (Acartia spp.). In the presence of copepods, however, the amplitude of the DVM was enhanced, providing the dinoflagellate with greater spatial separation from its 'normally' migrating predator. We briefly discuss the causes (cues) and ecological consequences of predator-enhanced DVM in dinoflagellates.