Monitoring of cyanobacteria and cyanotoxins in a Colombian tropical reservoir

被引:0
作者
Luisa F. Caly
Diana C. Rodríguez
Gustavo A. Peñuela
机构
[1] University Research Campus (SIU),Pollution Diagnostics and Control Group (GDCON), School of the Environment, Faculty of Engineering
[2] University of Antioquia (UdeA),undefined
来源
Environmental Science and Pollution Research | 2022年 / 29卷
关键词
Colombia; Cyanobacteria; Cyanotoxins; Tropical reservoir;
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中图分类号
学科分类号
摘要
Anthropogenic pollution and global climate change have resulted in favorable environmental conditions for increased frequency and duration of cyanobacterial blooms in aquatic systems. Cyanobacteria can produce toxic metabolites called cyanotoxins, which have become a worldwide concern as they threaten human and animal health. The presence of cyanobacteria and four cyanotoxins were evaluated in a Colombian reservoir. The reservoir was monitored for a year, with sampling campaigns every 3 months in seven stations. To identify and quantify cyanotoxins, the ultra-high-performance liquid chromatography coupled with triple quadrupole mass spectrometry (UHPLC-QqQ-MS/MS) technique was used, and the quantification of cyanobacteria was done by quantitative real-time PCR (qPCR) assay using a cyanobacterial-specific 16S rRNA gene fragment as a target. Cyanobacteria concentration was between 4.02 (± 0.11) × 104 and 2.72 (± 0.28) × 107 copies of Cyan 16S/μL, the minimum value corresponds to the station located in the central zone and the maximum to the station at the entrance of one of the tributary rivers. The presence of MC-RR, MC-LR, MC-YR, and NOD was detected in at least six of the seven sampling stations at different times of the year. In all cases, the concentration of the toxins detected was below 0.05 μg/L, so the guideline value established by the WHO for MC-LR was not exceeded.
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页码:52775 / 52787
页数:12
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