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Toxigenic Dinoflagellates and Associated Toxins in San Jorge Gulf, Argentina

机译：阿根廷圣豪尔赫湾的产毒鞭毛藻和相关毒素

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摘要

The occurrence of harmful algal blooms (HABs) is a global problem, and particularly in San Jorge Gulf (SJG), Argentina, which supports important fisheries, HABs represent a risk to human health. We studied the diversity and distribution of toxigenic dinoflagellates in the SJG using toxin detection and quantification, and assessed the connections between cell densities, toxins, and oceanographic parameters. Phytoplankton net samples were taken for microscopic and liquid chromatography tandem mass spectrometry (LC-MSMS) analyses during an expedition aboard R/V Coriolis //in February 2014. Solid phase adsorption toxin tracking (SPATT) devices were also deployed to determine the presence of dissolved lipophilic toxins in seawater. Toxigenic dinoflagellate species and associated toxins showed different distribution patterns in the north and the south SJG. Protoceratium reticulatum and Dinophysis acuminata, together with yessotoxin and pectenotoxins, were predominantly detected in the northern SJG, mainly associated with low-nutrient, warmer waters. By contrast, Alexandrium catenella and paralytic shellfish toxins showed the highest relative abundances in the southern SJG, associated with high-nutrient, low-temperature waters. Cellular toxin content was also differently affected by environmental parameters, highlighting the complexity of HABs in this area. Spirolides were detected by SPATT for the first time in the SJG, suggesting the occurrence of A. ostenfeldii.
机译：有害藻华的发生是一个全球性问题，尤其是在支持重要渔业的阿根廷圣豪尔赫湾（SJG），危害藻对人类健康构成威胁。我们使用毒素检测和定量研究了SJG中产毒鞭毛藻的多样性和分布，并评估了细胞密度，毒素和海洋学参数之间的联系。 2014年2月，在R / V科里奥利号上进行的一次远征期间，对浮游植物净样品进行了显微和液相色谱串联质谱分析（LC-MSMS）。还使用了固相吸附毒素跟踪（SPATT）装置来确定是否存在浮游生物。在海水中溶解了亲脂性毒素。产毒的鞭毛藻物种和相关毒素在南北SJG中表现出不同的分布方式。主要在SJG北部发现了网纹原藻和Dinophysis acuminata，以及叶毒素和果胶毒素，主要与低营养，温暖的水有关。相比之下，亚历山大菌毛虫和麻痹性贝类毒素在SJG南部的相对丰度最高，与高营养，低温水有关。细胞毒素含量还受到环境参数的不同影响，突显了该区域HAB的复杂性。 SPATT首次在SJG中检测到了螺旋藻，表明发生了A. ostenfeldii。

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  • 来源
    《Oceanography》 |2018年第4期|145-153|共9页
  • 作者

    Fabro Elena; Krock Bernd; Torres Americo I; Paparazzo Flavio E.; Schloss Irene R.; Ferreyra Gustavo A.; Almandoz Gaston O.;

  • 作者单位

    Univ Nacl La Plata, Fac Ciencias Nat & Museo, Div Ficol, La Plata, Buenos Aires, Argentina|Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina;

    Helmholtz Zentrum Polar & Meeresforsch, Alfred Wegener Inst, Chem Okol, Bremerhaven, Germany;

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

    Consejo Nacl Invest Cient & Tecn, CESIMAR, Puerto Madryn, Chubut, Argentina|Univ Nacl Patagonia San Juan Bosco, Puerto Madryn, Chubut, Argentina;

    CADIC, Inst Antartico Argentino, Ushuaia, Tierra Fuego, Argentina|Univ Quebec Rimouski, Inst Sci Mer Rimouski, Rimouski, PQ, Canada|Univ Nacl Tierra Fuego, Ushuaia, Tierra Fuego, Argentina;

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

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

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