中文摘要：

季节的 meltwater 输入创造一薄添在在冰下面的表面海水的层，它大部分转移水藻集合。我们在高北极的光合的颜料的最近的观察证明那个冰底部和在冰下面的海水的 5 m 包含了 fucoxanthin 的相对高的集中，当叶绿素 b 和黄体素是在冰水接口和在冰下面的海水的 0 m 的主要诊断颜料时。另外，主导的浮游植物的一个著名变化发生在顶在冰下面的海水的 5 m，从在表面到统治 chlorophytes 在 5 m 深度硅藻主导，它可能在冰下面在表面海水归因于锋利的咸度坡度(从 12.5 ～ 28.1 的咸度) 。我们的结果暗示在在冰下面的表面层的那个浮游植物社区将在温暖北极海洋的未来成为更多的 chlorophytes。

英文摘要：

Seasonal meltwater input creates a thin freshen layer in surface seawater under ice, which largely shifts the algae assemblages. Our recent observation of photosynthetic pigments in the high Arctic showed that ice bottom and 5 m of seawater under ice contained relatively high concentration of fucoxanthin, while chlorophyll b and lutein were the major diagnostic pigments in ice-water interface and 0 m of seawater under ice. Additionally, a notable change of dominant phytoplankton occurred in the top 5 m of seawater under ice, from chlorophytes-dominated at surface to diatoms-dominated at 5 m depth, which might attribute to the sharp salinity gradient （salinity from 12.5 to 28.1） in the surface seawater under ice. Our results imply that phytoplankton community in surface layer under ice would become more chlorophytes in the future warming Arctic Ocean.