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Structure and Productivity of the Phytocenosis in the Southwestern Kara Sea in Early Spring

机译：早春西南卡拉海植物细胞的结构与生产力

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摘要

Results of plankton biota studies in the southwestern Kara are presented. The spatial distribution of hydrochemical and hydrophysical parameters related to structural and functional characteristics of phytoplankton in the surface water is considered. The chlorophyll a concentration varied in the surface layer of the Kara Sea from 0.08 to 3.22 mg m_(–3)(mean value 0.62 mg m_(–3)). Primary production varied from 0 to 1.92 mg C m_(–3)day_(–1)(the mean value of 0.42 mg C m_(–3)day_(–1)) in the ice-covered water areas and was greater by a factor of four, ranging from 1.01 to 3.46 mg C m_(–3)day_(–1)(the mean value of 1.79 mg C m_(–3)day_(–1)) in ice-free areas. In this case, the total algal biomass varied from 0.8 to 110.7 mg C m_(–3)(mean value 10.6 mg C m_(–3)). It is shown that in the study period, waters from the western Kara Sea were more productive than the estuarine water areas of the Ob and Yenisei rivers. The activity of phototrophic phytoplankton in river waters was almost completely absent. It is established that the contents of nutrients and iron were higher than the threshold for limitation of phytoplankton development. The experiments showed that the production activity of phototrophic algae is restrained by light deficit beneath the ice.
机译：展示了西南部克拉浮游生物Biota研究的结果。考虑了与地表水中浮游植物的结构和功能特征相关的水化学和水性学参数的空间分布。叶绿素的浓度在卡拉海的表面层中变化0.08至3.22mg m _（ - 3）（平均值0.62mg m _（ - 3））。初级生产在0至1.92mg C _（ - 3）日_（ - 1）（平均值为0.42mg C m _（ - 3）天_（ - 1）），冰盖的水域较大，均更大因子4，从1.01到3.46 mg C m _（ - 3）天_（ - 1）（平均值为1.79mg C m _（ - 3）天_（ - 1））。在这种情况下，总藻类生物量从0.8至110.7mg C m _（ - 3）变化（平均值10.6mg c _（ - 3））。结果表明，在研究期间，来自西卡拉海的水域比OB和Yenisei Rivers的河口水域更富有成效。河水中的光营养浮游植物的活性几乎完全没有。建立营养素和铁的含量高于浮游植物发育限制的阈值。实验表明，光营养藻类的生产活性受到冰下下方的光不足的抑制。

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  • 来源
    《Oceanology》 |2018年第3期|共9页
  • 作者

    S. A. Mosharov; A. F. Sazhin; E. I. Druzhkova; P. V. Khlebopashev;

  • 作者单位

    Shirshov Institute of Oceanology Russian Academy of Sciences;

    Shirshov Institute of Oceanology Russian Academy of Sciences;

    Murmansk Marine Biological Institute Kola Scientific Center;

    Shirshov Institute of Oceanology Russian Academy of Sciences;

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  • 正文语种 eng
  • 中图分类 海洋学;
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