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Cyanobacterial population and harmful metabolites dynamics during a bloom in Yanghe Reservoir, North China

机译：华北洋河水库开花期蓝藻种群和有害代谢物动态

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摘要

A significant outbreak of odorous and toxic cyanobacteria occurred in Yanghe Reservoir, North China, in the summer of 2007. The dominant species was Anabaena spiroides and it was accompanied with the occurrence of very high concentrations of the odor metabolite geosmin. The event included two cycles of growth of A spiroides: the first one of approximately 16 days between 21 June and 8 July, with the peak density 70,000 cells mL~(-1) on 2 July, and the second smaller bloom of over 50 days between 9 July and the end of August. The bloom also included a range of species of Microcystis, predominantly M. aeruginosa, as the second largest population, which varied from 5800 cells mL~(-1) to 28,000 cells mL~(-1) in the first cycle and from 2000 cells mL~(-1) to 11,000 cells mL~(-1) in the second. Geosmin reached the peak value of 7100 ng L~(-1) on 3 July, which was the highest value ever reported. The average geosmin production potential for A spiroides cells was approximately 0.1 pg cell~(-1), which was also very high and 85-97% of geosmin was found within the cells and in addition the dissolved geosmin did not increase even during the cyanobacterial decay period. In addition to odor metabolites, three microcystin variants MC-LR, MC-RR, MC-YR and anatoxin-a, most of which were intracellular, were detected, with MC-RR being the dominant cyanotoxin. The highest cyanotoxin concentrations were: dissolved: MC-RR 1.56 μg L~(-1) MC-YR 0.066 μg L~(-1) MC-LR0.544 μg L~(-1),anatoxin-a 0.106 μg L~(-1); intracellular: MC-RR70.1 μg L~(-1),MC-YR 3.76 μg L~(-1) MC-LR 24.6 μg L~(-1) anatoxin-a 0.184 μg L~(-1) and these occurred on 2 July. The correlation between geosmin and A spiroides was excellent (K~2 - 0.912), however the correlation between anatoxin-a concentrations and Anabaena densities and between MCs concentrations and Microcystis densities was not as strong. This study demonstrated the relatively complex requirement for monitoring cyanobacterial blooms in this lake in China, where both the range of odors and cyanotoxins can be produced in concentrations which can change rapidly over a short time along with the bloom composition. It also demonstrated that both odor compounds and cyanotoxins should be considered in terms of the potential hazard to public water supply when a bloom was dominated by Anabaena and Microcystis occurs.
机译：2007年夏季，华北洋河水库发生了一次有味和有毒的蓝细菌的暴发。主要物种为螺旋藻鱼腥藻，并伴有极高浓度的臭味代谢产物土臭虫。该事件包括螺旋藻A的两个生长周期：6月21日至7月8日之间大约16天的第一个周期，7月2日峰值密度为70,000个细胞mL〜（-1），第二次较小的开花期超过50天从7月9日到8月底。大花还包括一系列微囊藻，主要是铜绿假单胞菌，为第二大种群，在第一周期从5800细胞mL〜（-1）到28,000细胞mL〜（-1）不等，从2000个细胞毫升〜（-1）至11,000个细胞毫升〜（-1）。 Geosmin于7月3日达到7100 ng L〜（-1）的峰值，这是有史以来的最高值。螺螺旋藻细胞的平均土工产生潜力约为0.1 pg cell〜（-1），也很高，并且在细胞内发现了85-97％的土质，此外，即使在蓝细菌时期，溶解的土质也不会增加衰减期。除气味代谢物外，还检测到三种微囊藻毒素变体MC-LR，MC-RR，MC-YR和抗毒素a，大多数在细胞内，其中MC-RR是主要的蓝毒素。氰毒素的最高浓度为：溶解：MC-RR 1.56μgL〜（-1）MC-YR 0.066μgL〜（-1）MC-LR0.544μgL〜（-1），毒素a 0.106μgL〜 （-1）;细胞内：MC-RR70.1μgL〜（-1），MC-YR 3.76μgL〜（-1）MC-LR 24.6μgL〜（-1）抗毒素-a 0.184μgL〜（-1）等发生在7月2日。土臭素和螺旋藻之间的相关性极佳（K〜2-0.912），但是，anatoxin-a浓度与鱼腥藻密度之间的相关性以及MC浓度与微囊藻密度之间的相关性不强。这项研究表明，在中国这个湖泊中，监测蓝藻水华的要求相对复杂，在这里，各种气味和氰毒素的浓度都可以随水华的组成在短时间内迅速变化。它也表明，在以花鱼和微囊藻为主的水华对公共供水的潜在危害方面，应考虑气味化合物和氰毒素。

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  • 来源
    《Harmful Algae》 |2010年第5期|P.481-488|共8页
  • 作者

    Zonglai Li; Jianwei Yu; Min Yang; Jing Zhang; Michael D. Burch; Wei Han;

  • 作者单位

    State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, China;

    rnState Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, China;

    rnState Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, China;

    rnState Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, China Beijing Center for Disease Prevention and Control, Beijing 100013, China;

    rnAustralian Water Quality Centre, Adelaide. SA 5001, Australia;

    rnBeijing Capital Co. Ltd., Beijing 100028, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    anabaena spiroides; anatoxin-a; cyanobacterial bloom; geosmin; microcystin; microcystis;

    机译：鱼腥藻Anatoxin-a;蓝藻水华;土臭素微囊藻毒素微囊藻;

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