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首页> 外文期刊>Estuarine Coastal and Shelf Science >Picoplankton composition related to thermohaline circulation: The Albanian boundary zone (southern Adriatic) in late spring
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Picoplankton composition related to thermohaline circulation: The Albanian boundary zone (southern Adriatic) in late spring

机译：与热盐循环有关的浮游植物组成：春季末的阿尔巴尼亚边界带（亚得里亚海南部）

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摘要

Picoplankton distribution at the boundary zone of the southern Adriatic in May 2009 on a 75 km long shelf-continental slope transect was assessed by combining epifluorescence microscopy, flow cytometry and high-performance liquid chromatography data with hydrographic observations. The picoplankton distribution was greatly influenced by the hydrographic conditions prevailing in the southern Adriatic because of the influence of the Levantine Intermediate Water (LIW) and East Adriatic Current (EAC) forcing. Heterotrophic bacteria numerically dominated the picoplankton community through the entire transect with no significant accumulation. By contrast, picophytoplankton accumulated in the 50-75 m layer, forming a pronounced deep chlorophyll maximum. Synechococcus dominated the photosynthetic picoplankton, whereas picoeukaryotes were the least abundant. The intrusion of warm LIW observed in the layer between 100 and 350 m was followed by Prochlorococcus and Synechococcus peaks (10 x 103 cells ml ' and 90 x 103 cells mL1, respectively), as well as by the appearance of two Synechococcus ecotypes. Most picoeukaryotes were observed at the offshore stations, where geostrophic current calculation revealed the strongest EAC influence. A strong EAC spread over the central and eastern basin created a barrier for Prochlorococcus, whereas the picoeukaryote maxima coincided with the core of the EAC, suggesting its persistence to hydrological instabilities.
机译：通过将落射荧光显微镜，流式细胞仪和高效液相色谱数据与水文观测相结合，评估了2009年5月亚得里亚海南部边界带长75 km的陆架陆坡样带上的浮游生物分布。由于黎凡特中间水（LIW）和东亚得里亚海洋流（EAC）强迫作用的影响，皮克浮游生物的分布受到亚得里亚海南部普遍的水文条件的极大影响。异养细菌在整个横断面中在数量上主导了微微浮游生物，没有明显的积累。相比之下，浮游植物聚集在50-75 m的层中，形成明显的深叶绿素最大值。球菌占主导地位的光合作用浮游生物，而微核生物则含量最少。在100至350 m之间的层中观察到温暖的LIW侵入，随后是原球菌和Synechococcus峰（分别为10 x 103个细胞ml'和90 x 103个细胞mL1），以及出现了两种Synechococcus生态型。在近海站观察到了大多数古生物，在地转流计算中显示出最强的EAC影响。强大的东非共同体遍布中东部盆地，为原球菌提供了屏障，而最大的皮氏真核生物恰好与东非共同体的核心重合，表明其持续存在水文不稳定性。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2011年第4期|p.519-525|共7页
  • 作者

    T. Šilović; Z. Ljubešić; H. Mihanović; G. Olujić; S. Terzić; Z. Jakšić; D. Viličić;

  • 作者单位

    Center for Marine Research, Ruder Boskovic Institute, C. Paliaga 5, 52210 Rovinj, Croatia;

    University of Zagreb, Faculty of Science, Division of Biology, Rooseveltov trg 6, 10000 Zagreb, Croatia;

    Hydrographic Institute of the Republic of Croatia, Zrinsko-Frankopanska 161, 21000 Split, Croatia;

    Hydrographic Institute of the Republic of Croatia, Zrinsko-Frankopanska 161, 21000 Split, Croatia;

    Division for Marine and Environmental Research, Ruder Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia;

    Center for Marine Research, Ruder Boskovic Institute, C. Paliaga 5, 52210 Rovinj, Croatia;

    University of Zagreb, Faculty of Science, Division of Biology, Rooseveltov trg 6, 10000 Zagreb, Croatia;

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  • 正文语种 eng
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  • 关键词

    picophytoplankton; oligotrophy; dcm; levantine intermediate water; albanian shelf; southern adriatic;

    机译：浮游植物;寡营养;dcm;左旋柳丁碱水;阿尔巴尼亚陆架;南亚得里亚海;

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