Abstract：
The Barents Sea is a highly productive ecosystem within the Arctic Ocean. The overall biological productivity in this region relies heavily on the secondary mesozooplankton production (MZP). Previous research has primarily focused on mesozooplankton abundance (MZA) and biomass (MZB), lacking a comprehensive analysis of the environmental factors that influence MZP in the Arctic marine environment. The primary objective of this study was to examine the key factors responsible for the spatial variability in the community structure and MZP during the summer season. Data were collected from 52 stations in the central Barents Sea, specifically during post-bloom conditions in 2015. Through cluster analysis, two distinct groups of stations were identified, differing in terms of mesozooplankton taxa abundance. Copepods were found to dominate the mesozooplankton assemblages, comprising 89% of total MZA, 83% of MZB, and 68% of MZP. The biomass stocks in the study area varied from 8 to 102 mg dry mass (DM) m-3, with an average of 44 mg DM m-3. MZP rates ranged from 0.34 to 2.33 mg DM m-3 day-1, with an average of 1.16 mg DM m-3 day-1. The highest MZB and MZP values were observed at frontal zones that separated relatively warm and cold waters. Through redundancy analysis, it was determined that the primary environmental factors affected the distribution of mesozooplankton were longitude, latitude, and sampling depth. Temperature, salinity, and chlorophyll a concentration were found to have a less significant impact. These findings emphasize the importance of oceanographic conditions as the main predictors of mesozooplankton distribution during the summer season in the Arctic marine environment. This study highlights the essential role of environmental forcing in determining the productivity of Arctic marine zooplankton. Given the ongoing climatic changes, the results of this report can serve as a valuable tool for monitoring pelagic ecosystems in the Arctic.
摘要：
巴伦支海是北冰洋中高产的生态系统。该地区的整体生物生产力在很大程度上取决于次级中浮游动物的生产（MZP）。以前的研究主要集中在中浮游动物的丰度（MZA）和生物量（MZB），缺乏对北极海洋环境中影响MZP的环境因素的全面分析。这项研究的主要目的是研究夏季引起群落结构和MZP空间变异性的关键因素。数据是从巴伦支海中部的52个站点收集的，特别是在2015年开花后的条件下。通过聚类分析,确定了两组不同的站点，中浮游动物类群的丰度不同。co足类动物被发现在中浮游动物组合中占主导地位，占MZA总量的89%，83%的MZB，和68%的MZP。研究区域的生物量储量从8到102mg干重（DM）m-3不等，平均为44mgDMm-3。MZP率范围为0.34至2.33mgDMm-3day-1，平均为1.16mgDMm-3day-1。在相对温暖和寒冷的水域分开的额叶区域观察到最高的MZB和MZP值。通过冗余分析,确定影响浮游动物分布的主要环境因子为经度，纬度,和采样深度。温度,盐度,和叶绿素a浓度的影响较小。这些发现强调了海洋学条件作为夏季北极海洋环境中浮游动物分布的主要预测因子的重要性。这项研究强调了环境强迫在确定北极海洋浮游动物生产力中的重要作用。鉴于当前的气候变化,本报告的结果可以作为监测北极中上层生态系统的宝贵工具。
