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首页> 外文期刊>Harmful Algae >Taxonomic assessment of a toxic cyanobacteria shift in hypereutrophic Grand Lake St. Marys (Ohio, USA)
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Taxonomic assessment of a toxic cyanobacteria shift in hypereutrophic Grand Lake St. Marys (Ohio, USA)

机译：富营养化大圣玛丽湖中有毒蓝细菌转移的分类学评估（美国俄亥俄州）

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摘要

Grand Lake St. Marys (Ohio, USA) is a hypereutrophic reservoir prone to persistent toxic cyanobacterial blooms fueled by agricultural nutrient runoff. The pervasive and highly toxic 2010 bloom led to the collapse of the local tourism industry, with microcystin concentrations exceeding 2000 μg mL~(-1) at some locations during the peak of the bloom. Sampling from a location adjacent to the intake to the Celina Water Treatment Plant, chlorophyll a levels remained above 25 μg L~(-1) from June to September, reaching a maximum in excess of 100 μgL~(-1) in July. Molar ratios of dissolved inorganic nitrogen (DIN) to dissolved inorganic phosphorus (DIP) declined below 16 in July and August, suggesting the cyanobacterial population became N-limited during the bloom peak. Cyanobacterial biomass was dominated by Planktothrix spp. throughout late summer 2010, but phylogenetic analysis of mcyA sequences revealed the presence of toxic Microcystis spp. during July that coincided with the highest toxin measurements. August and September samples indicated the community shifted to yield Planktothrix spp. as the major toxic genus. Community shifts of this nature may impede targeted remediation efforts, and therefore a thorough understanding of the taxa involved is necessary prior to implementing strategies to limit bloom formation.
机译：圣玛丽斯大湖（美国俄亥俄州）是一种富营养化的水库，容易受到农业养分径流的推动而持续产生有毒的蓝藻水华。 2010年普遍存在且剧毒的大花导致当地旅游业崩溃，在大花高峰期间某些地方的微囊藻毒素浓度超过2000μgmL〜（-1）。从Celina水处理厂进水口附近采样，从6月到9月，叶绿素a水平保持在25μgL〜（-1）以上，7月最高达到100μgL〜（-1）以上。 7月和8月，溶解无机氮（DIN）与溶解无机磷（DIP）的摩尔比下降到16以下，这表明蓝藻种群在开花高峰期变为N受限。蓝藻生物质以浮游生物为主。整个2010年夏末，但对mcyA序列的系统发育分析表明，存在有毒的微囊藻属。在7月份，与最高的毒素含量相吻合。 8月和9月的样本表明该社区转向生产Planktothrix spp。作为主要的毒性属。这种性质的社区转移可能会阻碍有针对性的修复工作，因此，在实施限制开花的策略之前，必须对所涉及的分类单元有透彻的了解。

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  • 来源
    《Harmful Algae》 |2014年第3期|12-18|共7页
  • 作者

    Morgan M. Steffen; Zhi Zhu; Robert Michael L. McKay; Steven W. Wilhelm; George S. Bullerjahn;

  • 作者单位

    Department of Microbiology, The University of Tennessee, Walters Life Sciences, Knoxville, TN 37996-0845, USA;

    Department of Biological Sciences, Bowling Green State University, Life Sciences Building, Bowling Green, OH 43043, USA;

    Department of Biological Sciences, Bowling Green State University, Life Sciences Building, Bowling Green, OH 43043, USA;

    Department of Microbiology, The University of Tennessee, Walters Life Sciences, Knoxville, TN 37996-0845, USA;

    Department of Biological Sciences, Bowling Green State University, Life Sciences Building, Bowling Green, OH 43043, USA;

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  • 正文语种 eng
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  • 关键词

    Anatoxin; Cyanobacterial blooms; Grand Lake St. Marys; Microcystin; Microcystis sp.; Planktothrix sp.;

    机译：抗毒素;蓝藻水华;大湖圣玛丽斯;微囊藻毒素微囊藻Planktothrix sp。;

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