Lipid content in overwintering Calanus finmarchicus across the Subpolar Eastern North Atlantic Ocean
Lipid content in overwintering Calanus finmarchicus across the Subpolar Eastern North Atlantic Ocean
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DOI：
10.1002/lno.11167
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发表时间：
2019-09-01
影响因子：
4.5
通讯作者：
Heath, Michael R.
中科院分区：
文献类型：
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作者：
Jonasdottir, Sigrun H.;Wilson, Robert J.;Heath, Michael R.
北方桡足类哲水蚤finmarchicus积累脂肪储备在夏季觅食期间在表面的海洋沃茨，这使它能够留在深度和越冬期间的饥荒生存。在海洋深处（某些地区超过1 000米）长时间越冬期间，脂质的呼吸已被证明会导致碳净固存到深海中：所谓的“脂质泵”。“在这里，我们提供了一个全面的综合的地理和垂直变化的越冬动物的脂质含量在整个亚极地东北大西洋，并在此基础上，我们修订了估计的碳封存。在250米以上的深度，蜡酯含量为40至190微克（-1），在法罗群岛东部斜坡和格陵兰东部400至600米深处最冷（< 0摄氏度）的沃茨浓度最高，在较温暖（> 4摄氏度）的Irminger海和Rockall盆地浓度最低。我们的新分析结果表明，在高达11.5 g C m（-2）的情况下，碳封存的估计值高出约44%。
The boreal copepod Calanus finmarchicus accumulates lipid reserves during summer feeding in surface ocean waters, which enable it to stay at depth and survive famine during overwintering. Respiration of lipids during prolonged overwintering at ocean depths (> 1000 m in some areas) has been shown to result in a net sequestration of carbon into the deep ocean: the so-called "lipid pump." Here, we provide a comprehensive synthesis of the geographic and vertical variations in lipid content of overwintering animals across the Subpolar Eastern North Atlantic and, on the basis of this, we revise the estimates of carbon sequestration. Wax ester content ranged from 40 to 190 mu g individual(-1) at > 250 m depths, with highest concentrations in the coldest (< 0 degrees C) waters at 400-600 m depth at the slope east of Faroe Islands and east of Greenland and lowest in the warmer (> 4 degrees C) Irminger Sea and Rockall Basin. Our new analysis results in about 44% higher estimates of carbon sequestration at up to 11.5 g C m(-2).