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首页> 外文期刊>Harmful Algae >Inhibition of growth rate and swimming speed of the harmful dinoflagellate Cochlodinium polykrikoides by diatoms: Implications for red tide formation
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Inhibition of growth rate and swimming speed of the harmful dinoflagellate Cochlodinium polykrikoides by diatoms: Implications for red tide formation

机译：硅藻抑制有害鞭毛甲藻鞭毛藻的生长速度和游动速度：对赤潮形成的影响

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摘要

The harmful dinoflagellate Cochlodinium polykrikoides is responsible for red tides that cause large fish kills and extensive economic losses for the fishing industry. Diatoms, another component of planktonic communities, may play critical roles in the red tide dynamics of C. polykrikoides. Possible inhibition of C. polykrikoides growth rate and swimming speed by the common diatoms Chaetoceros danicus, Skeletonema costatum, and Thalassiosira decipiens through physical and chemical mechanisms was explored. S. costatum, C. danicus, and T. decipiens reduced the swimming speed of C. polykrikoides at diatom concentrations of ＞5000, 25,000, and 1000 cells ml~(-1), respectively. Filtrates from cultures of S. costatum, C. danicus, and T. decipiens also lowered swimming speeds of C. polykrikoides, at diatom concentrations of ＞250,000, 50,000, and 1000 cells ml~(-1), respectively. S. costatum caused negative growth rates of C. polykrikoides at concentrations of ＞～130,000 cells ml~(-1), while C. danicus caused negative growth rates at concentrations of ＞～1200 cells ml~(-1). Simple models parameterized using the experimental data reproduced the changes in C. polykrikoides cell concentrations driven by the presence of diatoms. Thus common diatoms may inhibit growth rate and swimming speed of C. polykrikoides; reduce the depths reached by C. polykrikoides through vertical migration; and, in turn, delay or prevent the outbreak of C. polykrikoides red tides.
机译：有害的鞭毛鞭毛藻可能是造成赤潮的原因，赤潮会导致大量鱼类死亡，给渔业造成巨大的经济损失。硅藻是浮游生物的另一个组成部分，在多角衣藻的赤潮动力学中可能起关键作用。探索了通过物理和化学机制对常见硅藻Chaetoceros danicus，Skeletonema costatum和Thalassiosira decipiens抑制多角衣藻生长速度和游泳速度的方法。在硅藻浓度分别> 5000、25,000和1000细胞ml〜（-1）时，S。costatum，C。danicus和T. decipiens降低了多角毛衣藻的游泳速度。分别在＞ 25万，50,000和1000细胞ml〜（-1）的硅藻浓度下，来自肋节藻，念珠菌和拟南芥培养物的滤液也降低了多角梭菌的游泳速度。链球菌在浓度＞〜130,000细胞ml〜（-1）时引起多角衣藻的负生长，而念珠菌在浓度＞〜1200细胞ml〜（-1）时引起负的生长。使用实验数据进行参数化的简单模型再现了由硅藻的存在驱动的多角衣藻细胞浓度的变化。因此，常见的硅藻可能会抑制多角衣藻的生长速度和游泳速度。通过垂直迁移减少多角衣藻的到达深度；进而延缓或阻止多角衣原体红潮的爆发。

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  • 来源
    《Harmful Algae》 |2014年第7期|53-61|共9页
  • 作者

    An Suk Lim; Hae Jin Jeong; Tae Young Jang; Se Hyeon Jang; Peter J.S. Franks;

  • 作者单位

    School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea;

    School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea,Advanced Institutes of Convergence Technology, Suwon, Gyeonggi-do 443-270, Republic of Korea;

    School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea;

    School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea;

    Integrative Oceanography Division, Scripps Institution of Oceanography, UC San Diego 9500 Gilman Drive # 0218, La Jolla/, CA 92093-0218, USA;

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  • 正文语种 eng
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  • 关键词

    Chemical stress; Filtrate; Harmful algal bloom; Mixotrophic dinoflagellate; Physical contact;

    机译：化学应力滤液;有害的藻华;杂养的鞭毛藻;身体接触;

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