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首页> 外文期刊>Environmental toxicology and chemistry >Extracts from Benthic Anatoxin-Producing Phormidium Are Toxic to 3 Macroinvertebrate Taxa at Environmentally Relevant Concentrations
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Extracts from Benthic Anatoxin-Producing Phormidium Are Toxic to 3 Macroinvertebrate Taxa at Environmentally Relevant Concentrations

机译：在与环境有关的浓度下，来自产底毒素的Ph的提取物对3种无脊椎动物分类群有毒。

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摘要

Toxin-producing cyanobacteria are increasing in rivers and streams globally, leading to growing concerns over their potential impacts on aquatic ecosystems. The present study was designed to culture field-collected Phormidium in the laboratory, identify individual species, conduct chemical analyses to identify cyanotoxins, and conduct toxicity tests to investigate the potential for this genera to impact stream health. Freshwater toxicity tests were conducted with standard US Environmental Protection Agency invertebrate test protocols with culture water used to grow 3 Phormidium strains isolated from the Russian River (CA, USA). Enzyme linked immunosorbent assays were used to measure total anatoxin concentrations. Culture waters from the 3 Phormidium strains were highly toxic to Ceriodaphnia dubia, Hyalella azteca, and Chironomus dilutus. The C. dubia 7-d survival median lethal concentrations were 0.71, 0.49, and 0.56g/L anatoxin for Phormidum strains 1, 2, and 3, respectively. The 7-d reproduction inhibitory concentrations, 25% were 0.55, 0.32, and 0.30g/L anatoxin for strains 1, 2, and 3, respectively. Chironomus dilutus survival was reduced at concentrations 2g/L anatoxin by all 3 strains, and the H. azteca 96-h lethal concentrations, 25% were 2.82, 1.26, and 5.30g/L for strains 1, 2, and 3, respectively. Additional liquid chromatography-mass spectrometry analyses demonstrated that the likely anatoxin variant in these cultures was dihydro-anatoxin-a. The results suggest that anatoxins produced by Phormidium have the potential to impact stream macroinvertebrates. Environ Toxicol Chem 2018;37:2851-2859. (c) 2018 SETAC
机译：全球河流中产生毒素的蓝细菌正在增加，导致人们越来越担心它们对水生生态系统的潜在影响。本研究旨在在实验室中培养野外采集的Ph，鉴定单个物种，进行化学分析以鉴定氰毒素，并进行毒性测试以研究该属对河流健康的潜在影响。淡水毒性测试是使用美国环境保护局标准的无脊椎动物测试规程进行的，其中使用的培养水用于培养从俄罗斯河（美国加利福尼亚州）分离出的3株Phormidium菌株。酶联免疫吸附测定法用于测量总毒素浓度。来自3个Phormidium菌株的培养水对杜鹃，Chyodaella azteca和Chironomus dilutus具有高毒性。疫霉菌1、2和3的C. dubia 7-d存活中值致死浓度分别为0.71、0.49和0.56g / L Anatoxin。菌株1、2和3的7 d繁殖抑制浓度分别为0.55、0.32和0.30g / L的抗毒素，浓度为25％。在3种菌株中，<2g / L Anatoxin浓度时，稀释的Chironomus Dilutus的存活率降低了。对于菌株1、2和3，Azteca 96-h致死浓度的25％分别为2.82、1.26和5.30g / L。 。附加的液相色谱-质谱分析表明，这些培养物中可能存在的毒素毒素是二氢-毒素-α。结果表明，由or产生的抗毒素有可能影响流大型无脊椎动物。 Environ Toxicol Chem 2018; 37：2851-2859。 （c）2018年SETAC

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