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首页> 外文期刊>Environmental research >Can algicide (the thiazolidinedione derivative TD49) truly contribute to the restoration of microbial communities?
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Can algicide (the thiazolidinedione derivative TD49) truly contribute to the restoration of microbial communities?

机译：杀藻剂（噻唑烷二酮衍生物TD49）能否真正促进微生物群落的恢复？

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摘要

Harmful algal blooms (HABs) are becoming a more serious ecological threat to marine environments; they not only produce toxins, resulting in the death of marine organisms, but they also adversely affect biodiversity, which is an indicator of the health of an ecosystem. Thus, to mitigate HABs, numerous studies have been conducted to develop an effective algicide, but few studies have elucidated the effect of algicides on marine environmental health. In this study, thiazolidinedione derivative 49 (TD49), which has been developed as an algicide for the dinoflagellate Heterocapsa circularisquama, was used, and we investigated changes in phytoplankton biomass (abundance, chlorophyll a, and carbon biomass) and biodiversity (diversity, evenness, and richness) following the application of TD49. To gain deeper understanding, a large-scale mesocosm (1300 L) experiment containing control and treatment with four different concentrations (0.2, 0.4, 0.6 and 1 mu M) was conducted for 10 days. Based on a previous study, TD49 shows algicidal activity against H. circularisquama depending on its concentration. The phytoplankton biomass in the TD49 treatments was generally lower than that in the control due to the algicidal effect of TD49 on H. circularisquama. The biodiversity indices (e.g., the Shannon-Weaver index) in the treatments were consistently higher than those in the control before depletion of nitrite + nitrate. Interestingly, the 0.6 mu M TD49 treatment had higher biodiversity indices than the high-concentration treatment (1 mu M), which appeared to show a better algicidal effect. These findings suggest that mitigation of H. circularisquama blooms with TD49 treatment may enhance phytoplankton biodiversity, but treatment with excessively high concentrations can lead to harmful effects. During the study period, regardless of the control and TD49 treatments, the total biomass of phytoplankton gradually decreased from the midpoint of the experiment to the end of the experiment. This was more likely caused by the depletion of nutrients than by the toxicity of TD49.
机译：有害藻华正对海洋环境构成更为严重的生态威胁。它们不仅产生毒素，导致海洋生物死亡，而且还对生物多样性产生不利影响，这是生态系统健康的指标。因此，为了减轻HAB，已经进行了许多研究来开发有效的杀藻剂，但是很少有研究阐明杀藻剂对海洋环境健康的影响。在这项研究中，使用了噻唑烷二酮衍生物49（TD49），已将其用作藻鞭毛异鳞藻的藻灭药，并研究了浮游植物生物量（丰度，叶绿素a和碳生物量）和生物多样性（多样性，均匀性）的变化。和丰富度）。为了获得更深入的了解，进行了大规模的介观试验（1300升），其中包含四种不同浓度（0.2、0.4、0.6和1μM）的对照和处理。根据先前的研究，TD49根据其浓度显示出对圆环螺旋藻的杀藻活性。 TD49处理对浮游杆菌的杀藻作用，使TD49处理的浮游植物生物量一般低于对照。在亚硝酸盐+硝酸盐枯竭之前，处理中的生物多样性指数（例如，香农-韦弗指数）始终高于对照中的生物多样性指数。有趣的是，0.6μMTD49处理比高浓度处理（1μM）具有更高的生物多样性指数，似乎显示出更好的杀藻作用。这些发现表明，采用TD49处理可减轻轮虫的水华，可能增强浮游植物的生物多样性，但过高的浓度处理则可能导致有害影响。在研究期间，无论采用对照和TD49处理如何，浮游植物的总生物量从实验中点到实验结束逐渐减少。这很可能是由于营养的消耗而不是TD49的毒性所致。

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  • 来源
    《Environmental research》 |2019年第6期|517-527|共11页
  • 作者

    Baek Seung Ho; Son Moonho; Kim Young Ok; Cho Hoon; Chung Ik Kyo; Park Bum Soo;

  • 作者单位

    KIOST, South Sea Res Inst, Geoje 53201, South Korea;

    KIOST, South Sea Res Inst, Geoje 53201, South Korea|Natl Inst Fisheries Sci, South Sea Fisheries Res Inst, Yeosu 59780, South Korea;

    Korea Inst Ocean Sci & Technol, Marine Environm & Climate Res Div, Busan 49111, South Korea;

    Chosun Univ, Pioneer Res Ctr Controlling Harmful Algal Bloom, Dept Environm Engn, Gwangju 61452, South Korea;

    Pusan Natl Univ, Dept Oceanog, Busan 46241, South Korea;

    Korea Inst Ocean Sci Technol, Marine Ecosyst Res Ctr, Susan 49111, South Korea|Univ Texas Austin, Marine Sci Inst, Port Aransas, TX 78373 USA;

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  • 正文语种 eng
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  • 关键词

    Mesocosm; Thiazolidinedione derivative algicide; Phytoplankton biomass; Phytoplankton diversity;

    机译：中观;噻唑烷二酮衍生物杀藻剂;浮游生物量;浮游生物多样性;

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