一个属于自己的班级? 水溶性聚合物污染影响淡水宿主-病原体系统
Charlotte Robison-Smith1, Numair Masud1, Eve C Tarring2
1School of Biosciences, Cardiff University, CF10 3AX, UK.
The Science of the total environment
|October 27, 2023
概括
水溶性聚合物 (WSP),如聚乙醇 (PVA) 和聚乙烯 (PVP) 污染淡水生态系统. 这项研究揭示了它们对鱼类和寄生虫的有害影响,影响了物种间的相互作用.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 水生生态学 水生生态学
背景情况:
- 个人护理产品中的合成微塑料在欧盟/英国受到监管.
- 像PVA和PVP这样的水溶性聚合物 (WSP) 越来越多地被使用和下水处理.
- 由于潜在的高废水度,WSP对淡水生态系统构成重大风险.
研究的目的:
- 调查PVA和PVP预测环境度对淡水物种的影响.
- 评估WSP对鱼类 (Poecilia reticulata) 和寄生虫 (Gyrodactylus turnbulli) 的影响.
- 为了确定WSP和寄生虫感染对鱼类生命史特征的相互作用影响.
主要方法:
- 鱼类 (Poecilia reticulata) 在45天内暴露于不同度的PVA和PVP.
- 评估鱼类的生长,常规代谢率和生存率.
- 评估寄生虫 (Gyrodactylus turnbulli) 在宿主之外的生存率和宿主感染水平.
主要成果:
- WSPs通常会减少鱼类的生长,并增加代谢率,这取决于剂量和暴露时间.
- 仅寄生虫感染就减少了鱼类的生长,并增加了代谢率.
- 暴露于WSP降低了寄生虫的存活率,但鱼类上的寄生虫数量没有受到影响,这表明了复杂的相互作用.
结论:
- WSPs对水生生物产生有害影响,并破坏淡水生态系统中的物种间相互作用.
- 乙烯似乎是PVP的不那么有害的替代品.
- 调查结果有助于了解WSP风险,并为可持续的工业发展提供信息.
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