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首页> 外文期刊>Oceanography >Phytoplankton Rcology During a Spring-Neap Tidal Cycle in the Southern Tidal Front of San Jorge Gulf, Patagonia
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Phytoplankton Rcology During a Spring-Neap Tidal Cycle in the Southern Tidal Front of San Jorge Gulf, Patagonia

机译：巴塔哥尼亚圣豪尔赫湾南部潮汐带春季潮汐周期的浮游植物生态学

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摘要

Tidal fronts are interfaces that separate stratified from mixed waters. 'The stratified surface zone of a front has lower inorganic nutrient concentrations than the mixed side, and thus, phytoplankton assemblages are expected to differ from one side of the front to the other. Here, we characterize the physics, nutrient dynamics, and biology of the southern front in San Jorge Gulf (SJG), Argentina, during a spring-neap tidal cycle. Baroclinic instabilities influence the shape and position of the front and presumably play an important role in the horizontal transport across the front. The highest phytoplankton biomass concentrations were found in the waters of the stratified side of the front during neap tide, with picophytoplankton, cyanobacteria, and nanophytoplankton being the main contributors to the total autotrophic biomass. Bacteria contribute the most to heterotrophic biomass. In contrast, during spring tide, the carbon contribution of microphytoplankton was higher than during neap tide. In the mixed side, cells photoacclimate to optimum light conditions, suggesting that cells near the surface, which are probably photoinhibited, and cells below the euphotic zone, which are light-limited, are quickly advected by turbulent vertical motions to depths with optimal irradiance conditions.
机译：潮汐前沿是将分层水与混合水分开的界面。锋面的分层表面区域具有比混合侧更低的无机养分浓度，因此，浮游植物的组装预计从一侧到另一侧会有所不同。在这里，我们描述了春季潮汐周期中阿根廷圣豪尔赫湾（SJG）南端锋的物理，营养动态和生物学特征。斜压不稳定性会影响前部的形状和位置，并可能在前部的水平运输中发挥重要作用。在潮汐潮汐潮汐潮汐的分层水域中，浮游植物的生物量浓度最高，其中浮游植物，蓝细菌和纳米浮游植物是总自养生物量的主要贡献者。细菌对异养生物质的贡献最大。相反，在春季潮汐期间，微浮游植物的碳贡献高于在潮汐时期。在混合方面，细胞可以光适应最佳的光照条件，这表明在表面附近可能受光抑制的细胞，以及在富光区以下受光限制的细胞，会通过湍流垂直运动快速平移到最佳光照条件下的深度。

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  • 来源
    《Oceanography》 |2018年第4期|70-80|共11页
  • 作者

    Flores-Melo Ximena; Schloss Irene R.; Chavanne Cedric; Almandoz Gaston O.; Latorre Maite; Ferreyra Gustavo A.;

  • 作者单位

    Consejo Nacl Invest Cient & Tecn, Ctr Austral Invest Cient CADIC, Ushuaia, Tierra Fuego, Argentina;

    CADIC, Inst Antartico Argentine, Ushuaia, Tierra Fuego, Argentina|Univ Quebec Rimouski, ISMER, Rimouski, PQ, Canada|Univ Nacl Tierra del Fuego, Ushuaia, Tierra Fuego, Argentina;

    Univ Quebec Rimouski, ISMER, Rimouski, PQ, Canada;

    Univ Nacl La Plata, Fac Ciencias Nat & Museo, Div Ficol, CONICET, La Plata, Buenos Aires, Argentina;

    Consejo Nacl Invest Cient & Tecn, Ctr Nacl Patagon CENPAT, Ctr Estudio Sistemas Marinos, Puerto Madryn, Chubut, Argentina;

    Univ Quebec Rimouski, ISMER, Rimouski, PQ, Canada|Consejo Nacl Invest Cient & Tecn, CADIC, Ushuaia, Tierra Fuego, Argentina;

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