温度调节PFAS积累和对羊头小的代谢性能的影响.
Margot Grimmelpont1, Maria L Rodgers2, Milton Levin3
1Department of Natural Resources and the Environment, University of Connecticut, Storrs, Connecticut 06269, United States.
Environmental science & technology
|February 25, 2026
概括
水温上升加剧了对鱼类的和多基物质 (PFAS) 的影响. 温度升高会改变鱼组织中的PFAS水平,影响鱼类的新陈代谢,并可能损害后代的发育.
科学领域:
- 环境毒理学环境毒理学
- 水生生态生理学 水生生态生理学
- 气候变化影响气候变化的影响.
背景情况:
- 水生生态系统面临来自气候变暖和化学污染的综合压力因素.
- 这些综合性压力因素的生理影响,特别是和多基物质 (PFAS) 和温度,尚未完全理解.
研究的目的:
- 调查夏季平均水温预计上升如何影响羊头小鱼 (Cyprinodon variegatus) 的PFAS毒动力学和生理性能.
- 评估温度和PFAS暴露对鱼类新陈代谢,游泳,繁殖和体质指数的综合影响.
主要方法:
- 在当前 (26°C) 和预计 (28.5°C) 的夏季平均温度下,成年羊头小鱼被暴露在环境相关的PFAS混合物 (PFOS+PFOA) 中.
- 测量包括组织PFAS度,标准代谢率 (SMR),最大代谢率 (MMR),有氧范围 (AS),游泳表现,生殖产出和体质指数.
主要成果:
- 温度改变了PFAS组织度,PFOA在较高的温度下显着重新分配到蛋中.
- 代谢反应取决于温度:在26°C时,增加的PFAS与更高的SMR和MMR相关;在28.5°C时,增加的PFAS降低了MMR和AS.
- 虽然游泳和生殖没有显著变化,但肝体指数的增加和PFAS分布的改变表明了排毒成本.
结论:
- 预计平均水温的增加可能会加剧水生生物中PFAS造成的污染物压力.
- 这些发现强调了在对沿海鱼群的PFAS风险评估中需要考虑温度等共同压力因素的必要性.
- 由于污染物压力的增加,气温的升温可能会对鱼群的弹性和后代的发展成功产生负面影响.
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