Large pelagic crustaceans are a main component of the micronekton community in the deep-sea having an important role in the food webs and the biological carbon pump. However, they are scarcely studied in comparison to other groups such as mesopelagic fish. Here, we analyse day/night and bathymetric variability in taxonomic composition, abundance, and biomass across a latitudinal transect in the Atlantic Ocean from off Brazil (15°S) to the Canary Islands (25°N). A total of 95 species were identified belonging to 9 different families, of which Euphausiidae was the most abundant family and Acanthephyridae the family contributing the most to the total biomass. We found distinct assemblages associated with Atlantic ecoregions related to the environmental variables. Diel vertical migrations were detected along the entire transect, even crossing the oxygen minimum zone, likely due to the metabolic adaptations of these organisms.

中文翻译：

---

热带和亚热带大西洋微运动甲壳类动物（十足目、磷虾纲和腹足纲）的分布模式


大型中上层甲壳类动物是深海微游生物群落的主要组成部分，在食物网和生物碳泵中发挥着重要作用。然而，与中层鱼类等其他群体相比，它们的研究却很少。在这里，我们分析了从巴西近海（南纬 15°）到加那利群岛（北纬 25°）的大西洋纬度横断面的分类组成、丰度和生物量的昼/夜和测深变化。共鉴定出95个物种，分属于9个不同的科，其中磷虾科是数量最多的科，棘鱼科是对总生物量贡献最大的科。我们发现与环境变量相关的大西洋生态区相关的独特组合。沿整个横断面检测到昼夜垂直迁移，甚至跨越氧气最低区，这可能是由于这些生物体的代谢适应所致。