Composition of algal pigments in surface freshen layer after ice melt in the central Arctic
Composition of algal pigments in surface freshen layer after ice melt in the central Arctic
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北极中部冰雪融化后表面新鲜层中藻类色素的组成
DOI：
10.1007/s13131-017-1024-0
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发表时间：
2017
影响因子：
1.4
通讯作者：
Chen Jianfang
中科院分区：
文献类型：
--
作者：
Zhuang Yanpei;Jin Haiyan;Gu Fan;Zhang Yang;Bai Youcheng;Ji Zhongqiang;Lu Yong;Chen Jianfang
季节性的融水输入在冰下的表层海水中产生了一层薄薄的新鲜层，这在很大程度上改变了藻类的组合。我们最近在北极高纬度地区对光合色素的观测表明，冰底和冰下5 m海水中含有较高浓度的岩藻黄素，而叶绿素带叶黄素是冰-水界面和冰下0 m海水中的主要诊断色素。此外，冰下表层海水的盐度梯度（盐度从12.5 ~ 28.1）较大，导致冰下表层海水浮游植物优势种由表层的绿藻为主转变为5 m以下的绿藻为主。研究结果表明，随着北冰洋气候变暖，冰下表层浮游植物群落将向绿藻群落转变。
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 chlorophyllband 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.