Triclosan Alters Microbial Communities in Freshwater Microcosms
Triclosan Alters Microbial Communities in Freshwater Microcosms
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DOI：
10.3390/w11050961
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发表时间：
2019-05-01
期刊：
影响因子：
3.4
通讯作者：
Perron, Gabriel G.
中科院分区：
文献类型：
--
作者：
Clarke, Alexandra;Azulai, Daniella;Perron, Gabriel G.
三氯生对土壤和沉积物中微生物群落的影响已有充分的文献记载。然而，由于抗菌剂从沉积物或污水流出物中释放，三氯生对淡水溪流中存在的微生物群落可能产生的影响知之甚少。我们发现，三氯生的浓度低至1纳克/升，减少丰富性和均匀性的淡水微生物群落中生长的水柱，而使用受控的实验缩影。至关重要的是，在微生物群落中观察到的均匀度下降是由于选择了通常与人类活动相关的细菌，如不动杆菌属、假单胞菌属和红细菌属，而不是如前所述增加了蓝细菌。最后，我们的研究结果表明，与严重污染的环境相比，较高浓度的三氯生也会影响微生物群落的整体系统发育结构和群落组成。从公共卫生的角度来看，了解三氯生对这些微生物种群的影响至关重要，因为人类更经常地通过娱乐性使用暴露于水体中存在的微生物群落。
The effect of triclosan on microbial communities that are found in soil and sediments is well documented. However, little is known regarding the possible effects of triclosan on microbial communities that are present in the column of freshwater streams as the antimicrobial is released from sediments or from water sewage outflow. We show that a concentration of triclosan as low as 1 ng/L decreases richness and evenness in freshwater microbial communities growing in the water column while using controlled experimental microcosms. Crucially, the decrease in evenness that was observed in the microbial communities was due to the selection of bacteria commonly associated with human activity, such as Acinetobacter, Pseudomonas, and Rhodobacter, as opposed to an increase in Cyanobacteria, as previously suggested. Finally, our results demonstrate that higher concentrations of triclosan comparable to heavily polluted environments can also impact the overall phylogenetic structure and community composition of microbial communities. Understanding the impact of triclosan on these microbial populations is crucial from a public health perspective as human populations are more often exposed to microbial communities that are present in the water column via recreative use.