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首页> 外文期刊>Polar biology >Seasonal abundance and feeding patterns of copepods Temora longicornis, Centropages hamatus and Acartia spp. in the White Sea (66°N)
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Seasonal abundance and feeding patterns of copepods Temora longicornis, Centropages hamatus and Acartia spp. in the White Sea (66°N)

机译：pe足类天牛，臭Centr和A螨的季节性丰度和摄食模式。在白海（66°N）

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摘要

We have studied the seasonal dynamics of abundance and feeding characteristics of three species of calanoid copepods (Acartia spp., Centropages hamatus and Temora longicornis) in the White Sea from the surface water layer (0-10 m), in order to assess their role in the pelagic food web and to determine the major factors gov erning their population dynamics during the productive season. These species dominated in the upper water layer (0-10 m) from June through September, producing up to 3 generations per year. Data on the food spectra revealed all species to be omnivorous; but some inter- and intraspecific differences were observed. Generally, copepods consumed diatoms, dinoflagellates and microzooplankton. The omni vory index 'UC (i.e., fatty acid unsaturation coefficient) varied from 0.2 to 0.6, which implied ingestion of phyto plankton. The different degree of selectivity on the same food items by the studied species was observed, and therefore, successful surviving strategy with minimal overlapping could be assumed. In total, the populations of the three studied copepod species grazed up to 2.15 g C m~(2) day~(1) and released up to 0.68 g C m~(2) day~(1) in faecal pellets. They consumed up to 50% of paniculate organic carbon, or up to 85% of phytoplankton standing stock (in terms of Chl. a), and thus played a significant role in the transformation of paniculate organic matter. Sea sonal changes in abundance of the studied species depen ded mostly on water temperature in the early summer, but were also affected by food availability (Chl. a concentra tion) during the productive season.
机译：为了评估它们在白海中从地表水层（0-10 m）起的变化，我们研究了白海中三种类轮足co足类（Acartia spp。，Centropages hamatus和Temora longicornis）的丰度和摄食特性的季节动态。在远洋食物网中，并确定在生产季节控制其种群动态的主要因素。从6月到9月，这些物种在上层水层（0-10 m）中占主导地位，每年产生3代。食物光谱的数据表明所有物种都是杂食性的。但是观察到种间和种内差异。通常，co足类食用硅藻，鞭毛藻和微浮游动物。全指数'UC（即脂肪酸不饱和系数）从0.2到0.6不等，这意味着摄入了浮游植物。观察到所研究物种对相同食品的选择性程度不同，因此，可以假设成功的生存策略且重叠最小。总共研究的三种studied足类物种的种群在粪便颗粒中的放牧量高达2.15 g C m〜（2）day〜（1），释放量最大为0.68 g C m〜（2）day〜（1）。他们消耗了多达50％的颗粒状有机碳，或多达85％的浮游植物常备种群（按Chl。a所述），因此在颗粒状有机质的转化中发挥了重要作用。所研究物种丰富度的海平面变化主要取决于夏季初的水温，但也受生产季节食物供应量（浓度）的影响。

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  • 来源
    《Polar biology》 |2011年第8期|p.1175-1195|共21页
  • 作者

    Daria M. Martynova; Natalia A. Kazus; Ulrich V. Bathmann; Martin Graeve; Alexey A. Sukhotin;

  • 作者单位

    White Sea Biological Station, Zoological Institute of Russian Academy of Sciences, Universitetskaya nab., 1,199034 St. Petersburg, Russia;

    P.P. Shirshov Institute of Oceanology, Atlantic Branch,Mira pr., 1, 236000 Kaliningrad City, Russia;

    Alfred-Wegener-Institut fur Polar und Meeresforschung,Am Handelshafen 12, 27570 Bremerhaven, Germany;

    Alfred-Wegener-Institut fur Polar und Meeresforschung,Am Handelshafen 12, 27570 Bremerhaven, Germany;

    White Sea Biological Station, Zoological Institute of Russian Academy of Sciences, Universitetskaya nab., 1,199034 St. Petersburg, Russia;

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  • 关键词

    acartia; temora; centropages; feeding; population dynamics; the white sea; zooplankton;

    机译：car虫temora;人群馈送;人口动态;白海浮游动物;

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