Abstract—

Samples were collected in the area of the St. Anna Trough in the northern Kara Sea in September 2015 and July–August 2016. Based on salinity and temperature distribution, four areas have been distinguished: the shelf adjacent to the St. Anna Trough, the shelf edge, and the upper and lower parts of the continental slope. The variability of the structure of phytoplankton communities has been analyzed in view of environmental conditions in the distinguished areas. It is shown that changes in the species structure of phytoplankton are more associated with seasonal reorganization in the community than with the effect of river runoff and waters of the Barents Sea and Atlantic. In the shelf area, the presence of Barents Sea winter water led to an increase in the number of species of early spring diatoms and an increase in the abundance of early and late spring diatoms. An increase in the abundance and biomass of phytoplankton and changes in their vertical distribution in mid-July–early August occurred against the effect of Barents Sea and Atlantic waters on the area and desalination of the upper layer under the effect of river runoff in early September.

中文翻译：

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圣安娜海槽浮游植物：非生物因素的影响

摘要—

于2015年9月和2016年7月至2016年8月在北卡拉海的圣安娜海槽地区采集了样本。根据盐度和温度分布，区分了四个区域：与圣安娜海槽相邻的架子，大陆架边缘以及大陆坡的上部和下部。鉴于这些地区的环境条件，已经分析了浮游植物群落结构的变异性。结果表明，浮游植物物种结构的变化与社区的季节性重组更相关，而不是与河水径流和巴伦支海和大西洋的水域的影响有关。在架子上 巴伦支海冬季水的存在导致早春硅藻的种类增加，早春硅藻的丰度增加。7月中旬至8月初，浮游植物的丰度和生物量增加，垂直分布发生变化，这是在9月初受到河水径流的影响下，巴伦支海和大西洋水域对上层区域和淡化的影响。