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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Spring Time Production Of Bottom Ice Algae In The Landfast Sea Ice Zone At Barrow, Alaska
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Spring Time Production Of Bottom Ice Algae In The Landfast Sea Ice Zone At Barrow, Alaska

机译：阿拉斯加巴罗陆上海冰区底部冰藻的春季生产

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摘要

The primary production of bottom ice algae is an important food source for sympagic, pelagic and benthic organisms in the Arctic Ocean as well as Antarctic Ocean. Using ~(13)C-~(15)N isotope tracers, the recent ice algal production at Barrow during the spring season was lower in 2003 than three decades ago, although the maximum chlorophyll-a concentration for the bottom ice algae was similar to the values from previous studies. Estimated recent new and total production rates of the ice algae were 0.8 g C m~(-2) yr~(-1) and 2.0 g C m~(-2) yr~(-1) respectively, while the rates of water column phytoplankton were 0.2 g C m~(-2) yr~(-1) and 0.7 g C m~(-2) yr~(-1) for the spring sampling period in 2003. The ice algae contributed 74% of the pelagic primary production under the landfast sea ice at Barrow before the phytoplankton spring bloom. At the end of the season in 2003, a high carbon allocation of lipids in the ice algae was found. Three possible explanations- nutrient depletion, increasing light, and/or changes in species composition- were suggested for the high carbon incorporation into lipids. This high lipid synthesis of the bottom ice algae might be significant to zooplankton and benthic fauna grazers because lipids are the most energy dense biomolecules.
机译：底层冰藻的初级生产是北冰洋和南极海洋中交感，浮游和底栖生物的重要食物来源。使用〜（13）C-〜（15）N同位素示踪剂，尽管底部冰藻的最大叶绿素a浓度类似于先前研究的值。估计近期冰藻的新产量和总产量分别为0.8 g C m〜（-2）yr〜（-1）和2.0 g C m〜（-2）yr〜（-1），而水的产量为2003年春季采样期，浮游植物的浮游植物浮游生物的浮游生物的浮游生物的浮游生物的浮游生物的浮游生物的浮游生物的浮游生物的浮游生物的浮游生物的浮游生物在2003年春季采样期间为0.2 g C m〜（-2）yr〜（-1）和0.7 g C m〜（-2）yr〜（-1）。在浮游植物春季开花之前，巴罗陆上海冰下的浮游初级生产力。在2003年季节末，冰藻中的脂类碳含量较高。对于将高碳掺入脂质中，提出了三种可能的解释：养分消耗，光照增加和/或物种组成改变。底冰藻类的这种高脂质合成可能对浮游动物和底栖动物放牧者具有重要意义，因为脂质是能量密度最高的生物分子。

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