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首页> 外文期刊>International Journal of Environmental Research and Public Health >Associations among Human-Associated Fecal Contamination, Microcystis aeruginosa, and Microcystin at Lake Erie Beaches
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Associations among Human-Associated Fecal Contamination, Microcystis aeruginosa, and Microcystin at Lake Erie Beaches

机译：伊利湖海滩上与人类相关的粪便污染，铜绿微囊藻和微囊藻毒素之间的关联

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Lake Erie beaches exhibit impaired water quality due to fecal contamination and cyanobacterial blooms, though few studies address potential relationships between these two public health hazards. Using quantitative polymerase chain reaction (qPCR), Microcystis aeruginosa was monitored in conjunction with a human-associated fecal marker (Bacteroides fragilis group; g-Bfra), microcystin, and water quality parameters at two beaches to evaluate their potential associations. During the summer of 2010, water samples were collected 32 times from both Euclid and Villa Angela beaches. The phycocyanin intergenic spacer (PC-IGS) and the microcystin-producing (mcyA) gene in M. aeruginosa were quantified with qPCR. PC-IGS and mcyA were detected in 50.0% and 39.1% of samples, respectively, and showed increased occurrences after mid-August. Correlation and regression analyses showed that water temperature was negatively correlated with M. aeruginosa markers and microcystin. The densities of mcyA and the g-Bfra were predicted by nitrate, implicating fecal contamination as contributing to the growth of M. aeruginosa by nitrate loading. Microcystin was correlated with mcyA (r = 0.413, p < 0.01), suggesting toxin-producing M. aeruginosa populations may significantly contribute to microcystin production. Additionally, microcystin was correlated with total phosphorus (r = 0.628, p < 0.001), which was higher at Euclid (p < 0.05), possibly contributing to higher microcystin concentrations at Euclid.
机译：伊利湖海滩由于粪便污染和蓝藻水华而显示出水质受损，尽管很少有研究探讨这两种公共卫生危害之间的潜在关系。使用定量聚合酶链反应（qPCR），铜绿微囊藻与人类相关的粪便标记物（脆弱拟杆菌（Bacteroides fragilis group; g-Bfra）），微囊藻毒素和两个海滩的水质参数一起进行监测，以评估它们的潜在关联。在2010年夏季，从Euclid海滩和Villa Angela海滩收集了32次水样。用qPCR定量铜绿假单胞菌中藻蓝蛋白基因间隔区（PC-IGS）和产生微囊藻毒素（mcyA）基因。 PC-IGS和mcyA分别在50.0％和39.1％的样本中检测到，并且在8月中旬之后出现率增加。相关和回归分析表明，水温与铜绿假单胞菌标志物和微囊藻毒素呈负相关。硝酸盐可预测mcyA和g-Bfra的密度，这意味着粪便污染会导致硝酸盐负荷导致铜绿假单胞菌的生长。微囊藻毒素与mcyA相关（r = 0.413，p <0.01），表明产生毒素的铜绿假单胞菌种群可能显着促进微囊藻毒素的产生。此外，微囊藻毒素与总磷（r = 0.628，p <0.001）相关，在欧几里得较高（p <0.05），可能导致欧几里得的微囊藻毒素浓度更高。

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