重复发烧甲状腺脉冲对水生群体的影响
Sarah Betz-Koch1, Lukas Grittner1, Martin Krauss2
1Department Aquatic Ecotoxicology, Goethe University Frankfurt, Max-von-Laue Straße 13, 60438 Frankfurt am Main, Germany.
The Science of the total environment
|October 31, 2024
概括
像deltamethrin这样的甲基杀虫剂即使在短脉冲中也会伤害水生无脊椎动物. 现实的测试表明,环境度可以对淡水生态系统产生不可接受的影响.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 水生生态学 水生生态学
背景情况:
- 杀虫剂,特别是甲,对河流中的水生无脊椎动物生物多样性构成重大威胁.
- 农业排水频繁污染地表水与pyrethroids,对水生生物构成重大风险.
- 短时间接触农药可以导致严重的短期和长期生态影响.
研究的目的:
- 评估现实的甲状腺暴露场景对水生社区的影响.
- 评估deltamethrin脉冲暴露对宏无脊椎动物生存,繁殖和生物量的影响.
- 为了确定人工室内流 (AIS) 模拟脉冲暴露事件的有效性.
主要方法:
- 在人工室内流 (AIS) 中模拟了四次德尔塔美林脉冲暴露 (每次12小时) 在不同度 (0.6464 ng/L) 中.
- 脉冲之间间隔六天的恢复期,以模仿自然条件.
- 在混合水生群体 (Gammarus pulex,Ephemera danica,Lumbriculus variegatus,Potamopyrgus antipodarum) 中评估了致命和次致命的终点.
主要成果:
- 德尔塔美林暴露显著增加了Gammarus pulex的死亡率,随着度的上升.
- G. pulex 和 Lumbriculus variegatus 的生物质的繁殖产量在较高的德尔塔米特林水平下显著下降 (LOEC: 64 ng/L).
- 计算预测无效度 (PNEC) 为5.33 ng/L,低于环境测量水平,高达58.8 ng/L.
结论:
- 即使在环境相关度的短期德尔塔米特林脉冲也会对水生社区产生不利影响.
- 风险评估值 (RAC) 表明可能对淡水生态系统产生不可接受的影响.
- 人工室内流是有效的研究的生态影响的重复脉冲暴露从排水事件.
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