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首页> 外文期刊>Harmful Algae >Proliferation of the toxic dinoflagellate Ostreopsis cf. ovata in relation to depth, biotic substrate and environmental factors in the North West Mediterranean Sea
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Proliferation of the toxic dinoflagellate Ostreopsis cf. ovata in relation to depth, biotic substrate and environmental factors in the North West Mediterranean Sea

机译：毒性鞭毛鞭毛藻的增生参见。卵与西北地中海海域的深度，生物底物和环境因素的关系

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摘要

In recent decades, the North West Mediterranean Sea has been seriously affected by the development of the toxic benthic dinoflagellate Ostreopsis cf. ovata, which is associated with harmful effects on human health and the environment. The present work aims to provide a large overview of the multiple environmental factors assumed to regulate or influence the growth of Ostreopsis. An intensive sampling campaign over a full annual cycle was performed along the French and Italian coasts (in six sites from Cassis to Genoa), to determine patterns of temporal and spatial distributions of both 0. cf. ovata epiphytic and planktonic cells. Results highlighted substantial seasonal variations in the abundance of Ostreopsis. These variations correlated to seawater temperature, with an optimum growth temperature ranging from 23 ℃ to 27.5℃. Phosphate concentration, rather than nitrogen or silicate, was also positively associated with Ostreopsis. Decreases in oxygen and increases in chlorophyll a concentrations were recorded during the summer blooming period. The maximal Ostreopsis epiphytic abundance was generally higher on Dictyota spp. than on the other two sampled macroalgae (up to 8.54 x 106 cells g~(-1) FW), even though statistical analysis did not support a clear substrate preference. Epiphytic abundances were significantly higher at a very shallow depth (0.5 m), than at 1 and/or 3 m depths. High anthropogenic pressure (related to population density) seems to have promoted the occurrence of blooms in urbanized areas, which could partly explain the strong demarcation in Ostreopsis development between Western and Eastern sampling sites. The ecological niche of Ostreopsis cf. ovata needs precise definition, which will require further in situ and in vitro experimental studies, to determine the relative importance of distinct environmental parameters.
机译：近几十年来，西北地中海受到有毒底栖鞭毛藻鞭毛虫的发展的严重影响。卵子，它与对人类健康和环境的有害影响有关。本工作旨在提供对调节或影响骨质疏松症生长的多种环境因素的全面概述。在法国和意大利沿岸（从卡西斯到热那亚的六个地点）进行了整个年度周期的密集采样活动，以确定二者的时空分布模式。卵形附生和浮游细胞。结果突出显示了大量骨质疏松症的季节性变化。这些变化与海水温度有关，最佳生长温度为23℃至27.5℃。磷酸盐而不是氮或硅酸盐的浓度也与骨质疏松症呈正相关。在夏季开花期记录到氧气减少和叶绿素a浓度增加。 Dictyota spp上最大的骨质增生附生丰度通常较高。尽管统计分析不支持明显的底物偏爱，但比其他两个采样的大型藻类（最多8.54 x 106个细胞g〜（-1）FW）要好。在非常浅的深度（0.5 m）处，附生丰度明显高于在1和/或3 m深度处。高的人为压力（与人口密度有关）似乎促进了城市化地区水华的发生，这在一定程度上解释了东西方采样地点之间骨质疏松症发展的强烈界限。 Ostreopsis的生态位。卵子需要精确的定义，这需要进一步的原位和体外实验研究，以确定不同环境参数的相对重要性。

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  • 来源
    《Harmful Algae》 |2013年第4期|32-44|共13页
  • 作者

    S. Cohu; L. Mangialajo; T. Thibaut; A. Blanfune; S. Marro; R. Lemee;

  • 作者单位

    Universite Pierre et Marie Curie-Paris 6, Laboratoire d'Oceanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France,CNRS, Marine Microbial Ecology and Biogeochemistry, Laboratoire d'Oceanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France,Universite Nice-Sophia Antipolis, Laboratoire Ecosyste'mes Coders Marins et Reponse aux Stress, EA 4228, Parc Valrose, 06108 Nice Cedex2, France;

    Universite Nice-Sophia Antipolis, Laboratoire Ecosyste'mes Coders Marins et Reponse aux Stress, EA 4228, Parc Valrose, 06108 Nice Cedex2, France;

    Universite Nice-Sophia Antipolis, Laboratoire Ecosyste'mes Coders Marins et Reponse aux Stress, EA 4228, Parc Valrose, 06108 Nice Cedex2, France;

    Universite Pierre et Marie Curie-Paris 6, Laboratoire d'Oceanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France,CNRS, Marine Microbial Ecology and Biogeochemistry, Laboratoire d'Oceanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France,Universite Nice-Sophia Antipolis, Laboratoire Ecosyste'mes Coders Marins et Reponse aux Stress, EA 4228, Parc Valrose, 06108 Nice Cedex2, France;

    Universite Pierre et Marie Curie-Paris 6, Laboratoire d'Oceanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France,CNRS, Marine Microbial Ecology and Biogeochemistry, Laboratoire d'Oceanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France;

    Universite Pierre et Marie Curie-Paris 6, Laboratoire d'Oceanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France,CNRS, Marine Microbial Ecology and Biogeochemistry, Laboratoire d'Oceanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France;

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  • 正文语种 eng
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  • 关键词

    Dinoflagellate; HAB; Mediterranean Sea; Ostreopsis;

    机译：鞭毛藻;HAB;地中海;骨质疏松症;

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