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首页> 外文期刊>Journal of oceanography >Seasonal variability in carbon demand and flux by mesozooplankton communities at subarctic and subtropical sites in the western North Pacific Ocean
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Seasonal variability in carbon demand and flux by mesozooplankton communities at subarctic and subtropical sites in the western North Pacific Ocean

机译：北太平洋西部亚北极和亚热带站点中游浮游动物群落的碳需求和通量的季节性变化

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摘要

We investigated seasonal changes in carbon demand and flux by mesozooplankton communities at subtropical (S1) and subarctic sites (K2) in the western North Pacific Ocean to compare the impact of mesozooplankton communities on the carbon budget in surface and mesopelagic layers. Fecal pellet fluxes were one order higher at K2 than at S1, and seemed to be enhanced by copepod and euphausiid egestion under high chlorophyll a concentrations. The decrease in pellet volume and the lack of any substantial change in shape composition during sink suggest a decline in fecal pellet flux due to coprorhexy and coprophagy. While respiratory and excretory carbon by diel migrants at depth (i.e., active carbon flux) was similar between the two sites, the actively transported carbon exceeded sinking fecal pellets at S1. Mesozooplankton carbon demand in surface and mesopelagic layers was higher at K2 than S1, and an excess of demand to primary production and sinking POC flux was found during some seasons at K2. We propose that this demand was met by supplementary carbon sources such as feeding on protozoans and fecal pellets at the surface and carnivory of migrants at mesopelagic depths.
机译：我们调查了北太平洋西部亚热带（S1）和北极地区（K2）中型浮游动物群落碳需求和通量的季节性变化，以比较中型浮游动物群落对表层和中弹性层碳收支的影响。在K2时，粪便颗粒通量比在S1时高一阶，并且似乎在高叶绿素a浓度下被e足类动物和虾皮的消化作用增强了。沉淀过程中丸粒体积的减少和形状组成的任何实质变化都没有，这表明粪便丸粒通量的下降是由于共刺激性和共沉淀性引起的。虽然在两个位置上，di的迁徙者在深度（即活性碳通量）上的呼吸和排泄碳相似，但在S1处，主动运输的碳超过了粪便沉淀。 K2的表层和中弹性层的中层浮游生物的碳需求高于S1，并且在K2的某些季节中，初级生产和下沉POC通量的需求过量。我们建议通过补充碳源来满足这一需求，例如以原生动物和粪便颗粒为食，并以近中生深度的食肉动物为食。

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  • 来源
    《Journal of oceanography》 |2016年第3期|403-418|共16页
  • 作者

    Kobari T.; Nakamura R.; Unno K.; Kitamura M.; Tanabe K.; Nagafuku H.; Niibo A.; Kawakami H.; Matsumoto K.; Honda M. C.;

  • 作者单位

    Kagoshima Univ, Fac Fisheries, Aquat Sci, 4-50-20 Shimoarata, Kagoshima 8900056, Japan;

    Kagoshima Univ, Grad Sch Fisheries, Aquat Sci, 4-50-20 Shimoarata, Kagoshima 8900056, Japan;

    Kagoshima Univ, Grad Sch Fisheries, Aquat Sci, 4-50-20 Shimoarata, Kagoshima 8900056, Japan;

    Japan Agcy Marine Earth Sci & Technol, Res & Dev Ctr Global Change RCGC, 2-15 Natsushimacho, Yokosuka, Kanagawa 2370061, Japan;

    Kagoshima Univ, Fac Fisheries, Aquat Sci, 4-50-20 Shimoarata, Kagoshima 8900056, Japan;

    Kagoshima Univ, Fac Fisheries, Aquat Sci, 4-50-20 Shimoarata, Kagoshima 8900056, Japan;

    Kagoshima Univ, Fac Fisheries, Aquat Sci, 4-50-20 Shimoarata, Kagoshima 8900056, Japan;

    Japan Agcy Marine Earth Sci & Technol, Publ Relat Dept, 2-15 Natsushimacho, Yokosuka, Kanagawa 2370061, Japan;

    Japan Agcy Marine Earth Sci & Technol, Dept Environm Geochem Cycle Res, 2-15 Natsushimacho, Yokosuka, Kanagawa 2370061, Japan;

    Japan Agcy Marine Earth Sci & Technol, Dept Environm Geochem Cycle Res, 2-15 Natsushimacho, Yokosuka, Kanagawa 2370061, Japan;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mesozooplankton; Biological pump; Carbon flux; Fecal pellet; Diel vertical migration;

    机译：中生浮游生物;生物泵;碳通量;粪便颗粒;狄尔垂直迁移;

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