极低的重复性铁甲状腺脉冲会增加对虫幼虫 (Chaetopteryx villosa) 的有害影响,并影响物种相互作用
Sarah Betz-Koch1, Jörg Oehlmann2, Matthias Oetken2
1Department Aquatic Ecotoxicology, Goethe University Frankfurt, Max-von-Laue Straße 13, 60438 Frankfurt am Main, Germany.
Aquatic toxicology (Amsterdam, Netherlands)
|December 20, 2024
概括
农药的法规可接受度可能低估了环境风险. 这项使用人工流的研究表明,随着重复的德尔塔米特林脉冲,大死亡率增加和发育延迟,这表明需要更低的值.
科学领域:
- 环境毒理学环境毒理学
- 水生生态学 水生生态学
- 生态毒理学 生态毒理学
背景情况:
- 对于地表水的法规可接受度 (RAC) 通常是基于单个物种的急性毒性测试.
- 这些方法可能会低估在现实现场条件下与多个压力因素的环境影响.
- 由于雨或喷雾漂移等事件,可以发生农药峰值暴露,需要更复杂的风险评估.
研究的目的:
- 评估多次德尔塔米特林脉冲对人工室内流 (AIS) 中盆地社区的影响.
- 将结果与基于当前RAC值的预测进行比较.
- 强调高层次方法对于准确的环境风险评估的重要性.
主要方法:
- 人工室内流 (AIS) 用于模拟浮动的地表水条件.
- 地无脊椎动物在35天内暴露在1-4脉冲的deltamethrin (0.64 ng/L),有恢复阶段.
- 监测了死亡率,发育和物种相互作用.
主要成果:
- 卡迪斯幼虫死亡率随着deltamethrin脉冲的数量显著增加.
- 在四次脉冲后,幼虫的发育显著延迟.
- 虫似乎受益于竞争减少,因为虫死亡率增加.
结论:
- 目前的RAC值可能低估了杀虫剂的生态风险,如deltamethrin.
- 包含物种相互作用和多重压力因素的更高层次的方法对于现实的风险评估至关重要.
- 由于观察到的不确定性,建议为水生环境提供较低的RAC值.
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