Effects of Atlantification and changing sea‐ice dynamics on zooplankton community structure and carbon flux between 2000 and 2016 in the eastern Fram Strait
Effects of Atlantification and changing sea‐ice dynamics on zooplankton community structure and carbon flux between 2000 and 2016 in the eastern Fram Strait
复制标题
2000年至2016年间亚特兰化和海冰动态变化对弗拉姆海峡东部浮游动物群落结构和碳通量的影响
DOI：
--
复制
发表时间：
2022
影响因子：
4.5
通讯作者：
M. Iversen
中科院分区：
文献类型：
--
作者：
S. Ramondenc;E. Nöthig;Lili Hufnagel;E. Bauerfeind;K. Busch;Nadine Knüppel;A. Kraft;F. Schröter;Miriam Seifert;M. Iversen
在时间序列沉积物捕集器中收集浮游动物游泳者和下沉者，为浮游动物种群动态的全年和年际趋势提供了独特的见解。这些样本在偏远和难以进入的地区特别有价值，例如北冰洋，那里的冰雪覆盖季节样本非常罕见。在本研究中，我们在位于弗拉姆海峡东部（79°N，4°E）的长期生态研究观测站HAUSGARTEN（2000-2016年）的16年（2000-2016年）内，根据沉积物捕集器在180-280、800-1320和2320-2550 m水深收集的游泳者和下沉者调查了浮游动物的组成。时间序列数据显示了浮游动物优势类群的季节和年际趋势，包括桡足类、有孔虫、介形类、端足类、翼足类和毛颚类。浮游生物以端足类和桡足类为主，而浮游生物以翼足类和有孔虫为主。虽然这些群体的季节性出现在不同年份之间相对一致，但在丰度上存在显着的年际变化，这表明各种环境条件的影响，如海冰动态和水团的横向平流，例如融水和大西洋水。统计分析揭示了北极偶极子气候指数和海冰动态之间的相关性（即，冰覆盖和浓度），以及距离冰边缘的距离对游泳者组成模式和碳输出的重要性。
The collection of zooplankton swimmers and sinkers in time‐series sediment traps provides unique insight into year‐round and interannual trends in zooplankton population dynamics. These samples are particularly valuable in remote and difficult to access areas such as the Arctic Ocean, where samples from the ice‐covered season are rare. In the present study, we investigated zooplankton composition based on swimmers and sinkers collected by sediment traps at water depths of 180–280, 800–1320, and 2320–2550 m, over a period of 16 yr (2000–2016) at the Long‐Term Ecological Research observatory HAUSGARTEN located in the eastern Fram Strait (79°N, 4°E). The time‐series data showed seasonal and interannual trends within the dominant zooplankton groups including copepoda, foraminifera, ostracoda, amphipoda, pteropoda, and chaetognatha. Amphipoda and copepoda dominated the abundance of swimmers while pteropoda and foraminifera were the most important sinkers. Although the seasonal occurrence of these groups was relatively consistent between years, there were notable interannual variations in abundance, suggesting the influence of various environmental conditions such as sea‐ice dynamic and lateral advection of water masses, for example, meltwater and Atlantic water. Statistical analyses revealed a correlation between the Arctic dipole climatic index and sea‐ice dynamics (i.e., ice coverage and concentration), as well as the importance of the distance from the ice edge on swimmer composition patterns and carbon export.