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首页> 外文期刊>Harmful Algae >Occurrence of Amoebophrya spp. infection in planktonic dinoflagellates in Changjiang (Yangtze River) Estuary, China
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Occurrence of Amoebophrya spp. infection in planktonic dinoflagellates in Changjiang (Yangtze River) Estuary, China

机译：变形虫的发生。长江河口浮游性鞭毛虫的感染

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摘要

The parasitic dinoflagellates in the genus of Amoebophrya can infect broad ranges of planktonic dinoflagellates, and transform algal biomass into organic matter that can be recycled within the planktonic community. The ecological significance of Amoebophrya spp. during harmful algal bloom (HAB) events was gradually recognized along with revelation of its host specificity and diversity in picoplankton communities. The eutrophicated coastal waters of China are frequently affected by HABs, particularly in Changjiang (Yangtze River) estuary and the adjacent East China Sea; while, no research has been conducted to explore the ecological roles of parasitism during HAB events and the related dinoflagellate bloom dynamics. For the first time, we confirmed the presence of Amoebophrya infections in the planktonic community of this region; six species of dinoflagellates were infected, including Ceratium tripos, Scrippsiella trochoidea, Gonyaulax spinifera, Gymnodinium sp., Gonyaulax sp. and an Alexandrium sp. Molecular sequences retrieved from environmental water samples revealed high genetic diversity of Amoebophryidae-like organisms in the water column. Amoebophrya-infected dinoflagellates were only observed in high salinity (＞20) stations suggesting that salinity may be a factor limiting the distribution of Amoebophyra infections in natural environment. Whereas, no evidence of Amoebophrya infection was observed in the bloom-forming species Karenia mikimotoi, suggesting that K. mikimotoi in this region was likely free of Amoebophridae infection.
机译：变形虫属中的寄生鞭毛虫可以感染多种浮游性鞭毛虫，并将藻类生物质转化为有机质，可以在浮游生物中循环利用。变形虫的生态学意义。在有害藻华（HAB）事件期间，随着浮游植物群落宿主特异性和多样性的揭示，人们逐渐认识到了这一点。中国富营养化的沿海水域经常受到HAB的影响，特别是在长江（长江）河口和邻近的东海地区；同时，尚未进行任何研究来探讨HAB事件期间寄生虫的生态作用以及相关的鞭毛藻动态。我们首次确认了该地区浮游生物群落中存在变形虫感染。感染了6种鞭毛鞭毛藻，包括百里香藜，灰霉菌，棘孢子藻，裸子藻属，弓形藻。和亚历山大sp。从环境水样中检索到的分子序列显示出水柱中的变形虫科生物具有高度的遗传多样性。仅在高盐度（＞ 20）站中观察到被变形虫感染的鞭毛藻，这表明盐度可能是限制变形虫感染在自然环境中分布的因素。然而，在形成花bloom的Karenia mikimotoi物种中未观察到变形虫感染的迹象，这表明该地区的mikimotoi K.可能没有变形虫感染。

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  • 来源
    《Harmful Algae》 |2014年第7期|117-124|共8页
  • 作者

    Caiwen Li; Shuqun Song; Yun Liu; Tiantian Chen;

  • 作者单位

    Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

    Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

    Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

    Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Parasitic dinoflagellate; Algal bloom; Molecular diversity; Parasitism; Specificity;

    机译：寄生鞭毛藻;藻华分子多样性;寄生;特异性;

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