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首页> 外文期刊>Harmful Algae >Effect of marine heatwaves on bloom formation of the harmful dinoflagellate Cochlodinium polykrikoides: Two sides of the same coin?
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Effect of marine heatwaves on bloom formation of the harmful dinoflagellate Cochlodinium polykrikoides: Two sides of the same coin?

机译：海洋热水对有害Dinoflagelate Cochlodinium polykrikoides的盛开形成的影响：同一硬币的两侧？

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摘要

In 2018, the bloom of harmful dinoflagellate Cochlodinium polykrikoides occurred under abnormally high water temperature (WT) conditions caused by heatwaves in Korean coastal water (KCW). To better understand C. polykrikoides bloom at high WTs in 2018, we conducted field survey and laboratory experiments (the physiological and genetic differences between the two strains, CP2013 and CP2018). The heatwave increased the WT from 24.1 degrees C to 29.2 degrees C for two weeks, leading to strong stratification even in mid July (p 0.01, Chi square = 94.656, Kruskal-Wallis test). Under early stratification conditions, patch blooms formed more earlier than the average outbreak in the last 17 years in KCW, despite high WT reaching 30 degrees C. In laboratory experiments, although there were no genetic differences in the LSU rDNA, both strains showed a significant different growth response to high WTs; above 28 degrees C, CP2013 did not survive, but CP2018 was able to grow, suggesting that CP2018 had potential growth capacity at high WTs. However, the growth rate and yield of the culture (CP2018) were lowered at 30 degrees C. Also, the blooms of C. polykrikoides in 2018 lasted only 3 weeks, which is unusual short compared to the average duration since 2002. The negative correlation between the average WT and duration of C. polykrikoides bloom in previous 17 years (R-2 = 0.518, p 0.01) supports that high WT approaching 30 degrees C is not favorable for C. polykrikoides in KCW. Thus, our findings indicated that in relation to heatwaves, early stratification condition plays a critical role in developing C. polykrikoides blooms, but maintaining bloom are negatively affected under high WT conditions.
机译：2018年，在韩国沿海水（KCW）中的热浪引起的异常高水温（WT）条件下发生了有害的DinoflageLate Cochlodinium polykrikoides的绽放。为了更好地了解2018年高WTS的C. Polykrikoides绽放，我们进行了现场调查和实验室实验（两个菌株，CP2013和CP2018之间的生理和遗传差异）。热浪从24.1度C C增加了WT到29.2度两周，导致强分层即使在七月中旬（P＆0.01，卡方= 94.656，Kruskal-Wallis检验）。在早期分层条件下，尽管在实验室实验中达到30摄氏度，但在kcw中的过去17年中的平均爆发更早比平均爆发更早。在实验室实验中，虽然LSU RDNA没有遗传差异，但两种菌株都显示出显着的差异对高WTS的不同增长反应;在28摄氏度以上，CP2013没有生存，但CP2018能够生长，表明CP2018高WTS的增长能力。然而，培养的生长速率和产量（CP2018）在30℃下降低。此外，2018年的C.Polykrikoides的盛开持续了3周，与2002年以来的平均持续时间相比是不寻常的。负相关在先前的17岁（R-2 = 0.518，P <0.01）之前，C. polyKrikoides绽放的平均WT和持续时间之间（R-2 = 0.518）支持接近30摄氏度的高WT不利。因此，我们的研究结果表明，关于热浪，早期分层条件在开发C. polykrikoides盛开中起着关键作用，但维持绽放在高WT条件下受到负面影响。

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  • 来源
    《Harmful Algae》 |2021年第4期|102029.1-102029.12|共12页
  • 作者

    Lim Young Kyun; Park Bum Soo; Kim Jin Ho; Baek Sang-Soo; Baek Seung Ho;

  • 作者单位

    KIOST Korea Inst Ocean Sci & Technol Risk Assessment Res Ctr Geoje 53201 South Korea|Univ Sci & Technol Dept Ocean Sci Daejeon 34113 South Korea;

    KIOST Korea Inst Ocean Sci & Technol Marine Ecosyst Res Ctr Busan 49111 South Korea;

    KIOST Korea Inst Ocean Sci & Technol Risk Assessment Res Ctr Geoje 53201 South Korea|Natl Forens Serv DNA Anal Div Seoul 08036 South Korea;

    Ulsan Natl Inst Sci & Technol Sch Urban & Environm Engn Ulsan 44919 South Korea;

    KIOST Korea Inst Ocean Sci & Technol Risk Assessment Res Ctr Geoje 53201 South Korea|Univ Sci & Technol Dept Ocean Sci Daejeon 34113 South Korea;

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  • 关键词

    Heatwaves; High water temperature; Stratification; HABs; Cochlodinium polykrikoides; Intraspecific physiological characteristics;

    机译：散热;高水温;分层;杂草;核心耳骨髓聚氨酯;有内部的生理特性;

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