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首页> 外文期刊>Harmful Algae >Control of ichthyotoxic Cochlodinium polykrikoides using the mixotrophic dinoflagellate Alexandrium pohangense: A potential effective sustainable method
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Control of ichthyotoxic Cochlodinium polykrikoides using the mixotrophic dinoflagellate Alexandrium pohangense: A potential effective sustainable method

机译：使用营养混合性鞭毛鞭毛亚历山大藻pohangense来控制鱼鳞毒性多球菌科球藻：一种潜在的有效可持续方法

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摘要

Red tides dominated by Cochlodinium polykrikoides often lead to great economic losses and some methods of controlling these red tides have been developed. However, due to possible adverse effects and the short persistence of their control actions, safer and more effective sustainable methods should be developed. The non-toxic dinoflagellate Alexandrium pohangense is known to grow well mixotrophically feeding on C. polykrikoides, and populations are also maintained by photosynthesis. Thus, compared with other methods, the use of mass-cultured A. pohangense is safer and the effects can be maintained in the long term. To develop an effective method, the concentrations of A. pohangense cells and culture filtrate resulting in the death of C polykrikoides cells were determined by adding the cells or filtrates to cultured and natural populations of C polykrikoides. Cultures containing 800 A. pohangense cells m1(-1) eliminated almost all cultured C polykrikoides cells at a concentration of 1000 cells m1(-1) within 24 h. Furthermore, the addition of A. pohangense cultures at a concentration of 800 cells m1(-1) to C polykrikoides populations from a red-tide patch resulted in the death of most C. polykrikoides cells (99.8%) within 24 h. This addition of A. pohangense cells also lowered the abundances of total phototrophic dinoflagellates excluding C polykrikoides, but did not lower the abundance of total diatoms. Filtrate from 800 cells m1(-1) A. pohangense cultures reduced the population of cultured C polykrikoides by 80% within 48 h. This suggests that A. pohangense cells eliminate C polykrikoides by feeding and releasing extracellular compounds. Over time, A. pohangense concentrations gradually increased when incubated with C polykrikoides. Thus, an increase in the concentration of A. pohangense by feeding may lead to A. pohangense cells eliminating more C polykrikoides cells in larger volumes. Based on the results of this study, a 1 m(3) stock culture of A. pohangense at 4000 cells m1(-1) is calculated to remove all C. polykrikoides cells in ca. 200 m(3) within 6 days. Furthermore, maintenance of A. pohangense populations through photosynthesis prepared A. pohangense to eliminate C polykrikoides cells in future red-tide patches. Moreover, incubation of A pohangense at 2000 cells m1(-1) with juvenile olive flounder Paralichthys olivaceus for 3 days did not result in the death of fish. Therefore, the method developed in this study is a safe and effective way of controlling C polykrikoides populations and can be easily applied to aqua-tanks on land. (C) 2017 Elsevier B.V. All rights reserved.
机译：以球菌科多环孢菌为主的赤潮常常导致巨大的经济损失，因此已经开发出一些控制这些赤潮的方法。但是，由于可能的不利影响及其控制措施的持续时间短，应开发更安全，更有效的可持续方法。已知无毒的鞭毛藻亚历山大藻pohangense可以混合营养地生长在多角衣藻上，并通过光合作用维持种群。因此，与其他方法相比，使用大量培养的鲍氏曲霉更安全，并且可以长期保持效果。为了开发一种有效的方法，通过将细胞或滤液添加到培养的和自然的多聚核杆菌属群体中来确定导致多聚核杆菌属C细胞死亡的鲍氏农杆菌细胞和培养滤液的浓度。含有800个pohangense细胞m1（-1）的培养物在24小时内以1000个细胞m1（-1）的浓度消除了几乎所有培养的C多角核类细胞。此外，将来自赤潮斑块的浓度为800个细胞m1（-1）的鲍氏拟南芥培养物添加到多角拟南芥种群中，导致大多数多角拟南芥细胞（99.8％）在24小时内死亡。 Pohangense细胞的这种添加还降低了除C多角形类细菌外的总光养性鞭毛藻的丰度，但并未降低总硅藻的丰度。从800个细胞m1（-1）pohangense培养物中滤过的滤液在48小时内使培养的C多核类细菌的种群减少了80％。这表明，pohangense细胞通过喂入和释放细胞外化合物消除了C多聚核苷。随着时间的流逝，当与C多角核苷孵育时，pohangense浓度逐渐增加。因此，通过进食而增加了鲍氏农杆菌的浓度，可能导致鲍氏农杆菌细胞消除了更大体积的更多的C多角核类细胞。根据这项研究的结果，计算出4000个m1（-1）细胞中的1 m（3）pohangense A. pohangense菌落，以去除大约3个中的所有C. polykrikoides细胞。 6天内200 m（3）。此外，通过光合作用维持鲍氏农杆菌种群，可以制备鲍氏农杆菌以消除将来的赤潮斑中的C多角核蛋白细胞。此外，将A pohangense与幼稚的橄榄比目鱼Paralichthys olivaceus在2000细胞m1（-1）下孵育3天不会导致鱼死亡。因此，本研究开发的方法是控制多角藻类种群安全有效的方法，可轻松应用于陆地上的水族箱。 （C）2017 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Harmful Algae》 |2017年第3期|109-118|共10页
  • 作者

    Lim An Suk; Jeong Hae Jin; Kim Ji Hye; Lee Sung Yeon;

  • 作者单位

    Seoul Natl Univ, Sch Earth & Environm Sci, Coll Nat Sci, Brain Korea Plus Program 21, Seoul 08826, South Korea|Seoul Natl Univ, Sch Earth & Environm Sci, Coll Nat Sci, Seoul 08826, South Korea;

    Seoul Natl Univ, Sch Earth & Environm Sci, Coll Nat Sci, Seoul 08826, South Korea|Adv Inst Convergence Technol, Suwon 16229, Gyeonggi Do, South Korea;

    Seoul Natl Univ, Sch Earth & Environm Sci, Coll Nat Sci, Brain Korea Plus Program 21, Seoul 08826, South Korea;

    Seoul Natl Univ, Sch Earth & Environm Sci, Coll Nat Sci, Brain Korea Plus Program 21, Seoul 08826, South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Biological control; Harmful algal bloom; Olive flounder; Red tide;

    机译：生物防治;有害藻华;橄榄比目鱼;赤潮;

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