Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia.
Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia.
Mar Pollut Bull. 2020 Sep;158:111392. doi: 10.1016/j.marpolbul.2020.111392. Epub 2020 Jul 2.
Using in situ data of 2014-2018, the summers Emiliania huxleyi blooms in the Barents Sea were studied. The blooms were recorded in the upper mixed layer in July and August every year, during which they spread to cover large areas and were associated with Atlantic waters. The E. huxleyi abundance revealed interannual variability, with the highest values (up to 12 × 10 cells/L) in July 2016. Bloom is characterized by a sharp seasonal thermocline, water surface temperature of about 7.14-11.7 °C, low silicate (0.45 ± 0.08 μM) and nitrogen (0.74 ± 0.16 μM) concentration, high phosphorus concentration (0.09 ± 0.01 μM) and nitrogen to phosphorus ratio significantly below the Redfield ratio. Data confirming the hypothesis of limiting the growth of diatoms by nitrogen concentration are presented. When E. huxleyi bloomed, its biomass exceeded 70% of the total phytoplankton biomass, species diversity was low, and diatoms were practically absent, and dinoflagellates were usually represented by large species.
利用 2014-2018 年的原位数据，研究了巴伦支海 2014-2018 年夏季的赫氏海毛藻(E. huxleyi)水华。水华每年 7 月和 8 月都在上层混合层中被记录到，在此期间，它们扩散到大面积的海域，并与大西洋水域有关。赫氏海毛藻(E. huxleyi)的丰度呈现出年际变化，在 2016 年 7 月达到了最高值（高达 12×10 个细胞/L）。水华的特征是季节性温跃层明显，水面温度约为 7.14-11.7°C，硅（0.45±0.08μM）和氮（0.74±0.16μM）浓度低，磷（0.09±0.01μM）浓度高，氮磷比显著低于赤潮比。本文提供了氮浓度限制硅藻生长的假说的验证数据。当赫氏海毛藻水华时，其生物量超过总浮游植物生物量的 70%，物种多样性低，几乎没有硅藻，而通常是大型种类的甲藻。
