潮流对渤海浮游植物垂向分布的影响

Effect of tidal turbulence on the vertical distribution of phytoplankton in the Bohai Sea

该文利用三维动力生态耦合模型研究了水体紊动对甲藻和硅藻垂向分布的影响过程,分析了涨落潮对甲藻、硅藻不同影响特性的机理。结果表明,潮流紊动明显影响了浮游植物(如硅藻)的垂向分布。紊动在合适的光照和营养条件下能促使赤潮的形成。紊动对浮游植物垂向分布影响机理能很好地解释河口春季赤潮形成的原因,为进一步深入研究赤潮的发生规律提供动力依据。

In the present paper, we use a 3-D Eco-Dynamic model to study the turbulence effect induced by the tidal process on the vertical distribution of two main kinds of the phytoplankton, namely as diatom and dinoflagellate. The result shows that the tidal turbulence strongly affects the vertical distribution of phytoplankton （e. g. diatom）. The tidal flow may trigger a spring bloom under ideal light and nutrients conditions. Such turbulence mechanism can explain the occurrence cause of some spring blooms in the estuarine area.