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Cyanobacterial blooms modify food web structure and interactions in western Lake Erie

机译：蓝藻水华改变了伊利湖西部的食物网结构和相互作用

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摘要

With anthropogenic eutrophication and climate change causing an increase in cyanobacterial blooms worldwide, the need to understand the consequences of these blooms on aquatic ecosystems is paramount. Key questions remain unanswered with respect to how cyanobacteria blooms affect the structure of aquatic food webs, the foraging abilities of higher consumers, and the potential for cyanotoxins (e.g., microcystins [MCs]) to accumulate in fish. Toward addressing these uncertainties, physicochemical attributes, water (for MCs), phytoplankton, zooplankton, and epipelagic and benthic age-0 fish were sampled at 75 sites (44 sites for fish) of varying cyanobacteria concentration (0.1-44 mu g/L) in western Lake Erie during the cyanobacteria bloom season, 2013-2014. Sites with high cyanobacteria biomass were characterized by Mirrocystis spp. (84-100% of biomass), detectible levels of MCs (maximum = 10.8 mu g/L), and low water transparency (minimum = 0.25 m). Counter to expectations, strong positive relationships were found between cyanobacteria concentration and the biomass of several herbivorous zooplankton taxa (e.g., Daphnia, Diaphanosoma spp., Bosmina (formerly Eubosmina) coregoni, and Calanoida spp.). Expectations regarding fish were partly supported (e.g., diet selectivity varied across a cyanobacteria gradient) and partly not (e.g., consumption of zooplankton did not differ between bloom and nonbloom sites). These findings show that cyanobacterial blooms can strongly affect the distribution, composition, and interactions of zooplankton and fish, sometimes in surprising ways, highlighting the need to further explore their impact on aquatic food webs.
机译：由于人为富营养化和气候变化导致全球蓝藻水华增加，因此了解这些水华对水生生态系统的影响至关重要。关于蓝细菌的花蕾如何影响水生食物网的结构，高级消费者的觅食能力以及蓝藻毒素（例如微囊藻毒素[MCs]）在鱼类中蓄积的可能性，仍未回答关键问题。为了解决这些不确定性，在蓝藻浓度（0.1-44μg / L）的75个站点（鱼类的44个站点）采样了理化属性，水（用于MC），浮游植物，浮游动物以及上，上层和底栖0岁鱼。在2013-2014年蓝细菌盛开季节的伊利湖西部。 Mirrocystis spp对蓝藻生物量较高的位点进行了表征。 （占生物质的84-100％），可检测的MC含量（最大= 10.8μg / L）和低水透明度（最小= 0.25 m）。与预期相反，蓝藻浓度与几种草食性浮游动物类群（例如，水蚤，水仙属，博斯米纳（原名Eubosmina）coregoni和Calanoida spp。）的生物量之间存在很强的正相关。对鱼类的期望得到了部分支持（例如，饮食选择性在整个蓝细菌梯度上有所不同），而部分则没有（例如，浮游植物和非浮游植物在浮游动物的消费上没有差异）。这些发现表明，蓝藻的繁殖可以强烈地影响浮游动物和鱼类的分布，组成和相互作用，有时以令人惊讶的方式，强调需要进一步探索它们对水生食物网的影响。

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  • 来源
    《Harmful Algae》 |2020年第2期|101586.1-101586.15|共15页
  • 作者

    Briland Ruth D.; Stone Joshua P.; Manubolu Manjunath; Lee Jiyoung; Ludsin Stuart A.;

  • 作者单位

    Ohio State Univ Dept Evolut Ecol & Organismal Biol Aquat Ecol Lab 1314 Kinnear Rd Columbus OH 43212 USA;

    Ohio State Univ Dept Evolut Ecol & Organismal Biol Aquat Ecol Lab 1314 Kinnear Rd Columbus OH 43212 USA|Univ South Carolina Dept Biol Sci 700 Sumter St Columbia SC 29208 USA;

    Ohio State Univ Dept Evolut Ecol & Organismal Biol Aquat Ecol Lab 1314 Kinnear Rd Columbus OH 43212 USA|Ohio State Univ Coll Publ Hlth Div Environm Hlth Sci 1841 Neil Ave Columbus OH 43210 USA;

    Ohio State Univ Coll Publ Hlth Div Environm Hlth Sci 1841 Neil Ave Columbus OH 43210 USA|Ohio State Univ Dept Food Sci & Technol 2015 Fyffe Rd Columbus OH 43210 USA;

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  • 正文语种 eng
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  • 关键词

    Harmful algal bloom; Agricultural runoff; Nutrient pollution; Great lakes; Gizzard shad; Yellow perch;

    机译：有害的藻华;农业径流;营养污染;五大湖;izz鱼sha黄鲈;

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