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Abundant bioluminescent sources of low-light intensity in the deep Mediterranean Sea and North Atlantic Ocean

机译：地中海深海和北大西洋中大量的低光生物发光源

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摘要

Light plays a critical role in the functioning of the marine environment. In the dark ocean, bioluminescent organisms are the only visually relevant sources of light. Cameras of different sensitivities were used to compare the density of pelagic bioluminescent sources (BL) of different light intensities at a regional scale: the image-intensified charge-coupled device for deep-sea research (ICDeep), an image-intensified silicon intensifier target (ISIT) camera and a silicon intensifier target (SIT) camera. Pelagic ICDeep values were higher than ISIT measurements by a mean factor of 7.6 in the Mediterranean Sea and 3.5 in the Atlantic Ocean. Atlantic ISIT values were higher than SIT values by a mean factor of 4.5. Standardising bioluminescence measurements to the near-seafloor (0-400 m above bottom) layer, BLNSF, a logarithmic decrease with depth was observed from three independent datasets (slopes not significantly different): ISIT (Atlantic, Mediterranean), ICDeep (Mediterranean). Intercepts from ICDeep measurements were higher than ISIT measurements by a factor of 4.4. From these trends, a conversion factor to calculate benthopelagic plankton biomass from near-seafloor BLNSF density was derived. Calibration of the ICDeep enabled calculation of the minimum intensity of source visible to that camera. BLNSF sources of low-light intensity (a parts per thousand yen1.4 x 10(-7) W m(-2)) outnumber fourfold sources of greater intensity (> ca. 10(-6) W m(-2) (lambda (peak) = 470 nm). This reveals a high abundance of low-light bioluminescent sources in the marine environment, with mean pelagic densities of 33.15 sources m(-3) (Atlantic) and 6.79 sources m(-3) (Mediterranean) between 500 and 1500 m depth.
机译：光在海洋环境的功能中起着至关重要的作用。在黑暗的海洋中，生物发光生物是唯一与视觉相关的光源。使用不同灵敏度的相机在区域范围内比较不同光强度的远洋生物发光源（BL）的密度：用于深海研究的图像增强型电荷耦合器件（ICDeep），图像增强型硅增强靶材（ISIT）相机和硅增强靶（SIT）相机。在地中海，中上层ICDeep值高于ISIT测量值，平均值为7.6，在大西洋为3.5。大西洋ISIT值比SIT值高4.5的平均值。从三个独立的数据集（坡度无显着差异）观察到的标准化近海底（底部上方0-400 m）生物发光测量值随深度的对数减少（ISIT（大西洋，地中海），ICDeep（地中海））。来自ICDeep测量的拦截比ISIT测量的拦截高4.4倍。从这些趋势中，得出了一个根据近海BLNSF密度计算底栖浮游生物生物量的转换因子。校准ICDeep可以计算该摄像机可见光源的最小强度。弱光的BLNSF光源（每千日元的分量1.4 x 10（-7）W m（-2））数量多于强度更高的四倍光源（>约10（-6）W m（-2）（ lambda（峰值）= 470 nm）。这表明海洋环境中存在大量的弱光生物发光源，平均中上层密度为33.15个源m（-3）（大西洋）和6.79个源m（-3）（地中海）在500至1500 m深度之间。

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  • 来源
    《Marine biology》 |2015年第8期|1637-1649|共13页
  • 作者

    Craig Jessica; Priede Imants G.; Aguzzi Jacopo; Company Joan B.; Jamieson Alan J.;

  • 作者单位

    Univ Aberdeen, Oceanlab, Newburgh AB41 6AA, Scotland;

    Univ Aberdeen, Oceanlab, Newburgh AB41 6AA, Scotland;

    CSIC, Inst Ciencies Mar, E-08003 Barcelona, Spain;

    CSIC, Inst Ciencies Mar, E-08003 Barcelona, Spain;

    Univ Aberdeen, Oceanlab, Newburgh AB41 6AA, Scotland;

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