The Arctic Ocean is characterized as the greatly variable oceanic environment both seasonality and regionally. Such environmental variability would affect regional differences in the respective copepod community structures, though it has not been reported so far. In this study, we analyzed time-series zooplankton samples with focus on large copepods collected by sediment traps moored in three different regions of the Arctic Ocean at approximately 72–260 m water depth, and seasonality of copepod community structures were compared. Remarkable seasonality in the copepod community structure around Molloy deep in the eastern Fram Strait were due to the influence of endemic species transported by the West Spitsbergen Current. In contrast, in the southern Canada Basin (Northwind Abyssal Plain, Hanna Canyon and Barrow Canyon), the community structure of predominant large copepods showed less seasonality due to low primary production. In the MacKenzie Trough, the number of copepod swimmers were greater than those in all other regions investigated, which cooccur with much higher primary production in that area. These spatial differences in seasonality of copepod swimmer community structure were thought to be caused by various factors, not only sea ice seasonality but also differences in current patterns, endemic species and the magnitude of primary production.

北冰洋的特点是季节性和区域性变化很大的海洋环境。这种环境变异性将影响各个足类群落结构的区域差异，尽管目前尚未见报道。在这项研究中，我们分析了按时间顺序排列的浮游动物样本，重点是由停泊在北冰洋三个不同区域，水深约72–260 m的沉积物捕集器收集的大型po足类动物，并比较了pe足类动物群落结构的季节性。东部弗拉姆海峡深处莫洛伊周围the足类群落结构的明显季节性是由于西斯匹次卑尔根洋流运送的特有物种的影响。相反，在加拿大南部盆地（北风深渊平原，汉娜峡谷和巴罗峡谷），大型co足类动物的群落结构由于初级产量低而显示出较少的季节性。在麦肯齐海槽中，co足类游泳者的数量大于所调查的所有其他区域的数量，这与该地区的初级生产力高得多有关。co足类游泳者群落结构季节性的这些空间差异被认为是由多种因素引起的，不仅是海冰的季节性变化，而且还包括当前格局，特有物种和初级生产规模的差异。