Abstract―

The spatial distribution of picocyanobacteria at the arctic longitude section passing through the shelf of the Kara, Laptev, and East Siberian seas from 58° to 168° E was studied. The average abundance of picocyanobacteria was 0.48 ± 1.2 × 10⁹ cells/m³ in the Kara Sea, 0.16 ± 0.24 × 10⁹ cells/m³ in the Laptev Sea, and 0.25 ± 0.43 × 10⁹ cells/m³ in the East Siberian Sea. The fluctuations of picocyanobacterial abundance were determined by their presence in allochthonous sources: river flow and transformed North Atlantic waters. The highest abundance was observed in the areas of the runoff influence of the Ob, Khatanga, Indigirka, and Kolyma Siberian rivers: 0.5 × 10⁹, 0.2 × 10⁹, 0.4 × 10⁹, and 1.6 × 10⁹ cells/m³, respectively. The average contribution of picocyanobacteria to the total abundance and biomass of picophytoplankton in the western part of the Kara Sea was 37 and 36%, respectively. In other regions, the average contribution of picocyanobacteria to the total abundance and biomass of phototrophic picoplankton did not exceed 7 and 6%, respectively. A highly reliable (p\( \ll \) 0.01) positive correlation between the abundance and biomass of picocyanobacteria and the water temperature (p = 0.003) was revealed in the entire dataset obtained.

中文翻译：

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卡拉，拉普捷夫和东西伯利亚海架子上的浮游生物蓝细菌的空间分布

摘要-

研究了从58°E到168°E穿过卡拉，拉普捷夫和东西伯利亚海陆架的北极经度部分的微小蓝细菌的空间分布。picocyanobacteria的平均丰度为0.48±1.2×10 ⁹个细胞/米³在喀拉海，0.16±0.24×10 ⁹个细胞/米³在拉普捷夫海，和0.25±0.43×10 ⁹个细胞/米³在东西伯利亚海。微小蓝藻细菌丰度的波动取决于它们在异源中的存在：河流流量和转换后的北大西洋水域。在Ob，Khatanga，Indigirka和Kolyma西伯利亚河的径流影响区域观察到最高的丰度：0.5×10 ⁹，0.2×10 ⁹，0.4×10 ⁹和1.6×10 ⁹个细胞/米³，分别。蓝藻细菌对卡拉海西部地区浮游生物总丰度和生物量的平均贡献分别为37％和36％。在其他地区，微蓝藻细菌对光养浮游生物总丰度和生物量的平均贡献分别不超过7％和6％。所获得的整个数据集中显示了微蓝藻细菌的丰度和生物量与水温（p = 0.003）之间高度可靠的（p \（\ ll \） 0.01）正相关。