德国黑森州三个小农业小溪的农药动态,德国
Sarah Betz-Koch1, Björn Jacobs2, Jörg Oehlmann1
1Department Aquatic Ecotoxicology, Johann Wolfgang Goethe Universität Frankfurt am Main, Frankfurt/Main, Germany.
PeerJ
|July 24, 2023
概括
在小型水体中,农药监测至关重要. 这项研究发现,目前的监测低估了农药对水生生物的风险,凸显了环境保护方面的监管评估不足.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 淡水生态学 淡水生态
背景情况:
- 小水体对于淡水生物多样性至关重要.
- 系统的农药监测在小溪 (<30平方公里的流域) 是不常见的.
- 农业密集型地区面临着独特的监测挑战.
研究的目的:
- 评估农药在小农业小溪的发生和毒性.
- 评估当前监测和风险评估策略的有效性.
- 为了确定水生生物的基线毒性和毒性单位 (STU) 的总和.
主要方法:
- 在降雨事件 (2017-2018) 之后,以事件驱动的水样采集.
- 对37种农药和17种转化产品的分析.
- 微毒性测定用于基线毒性和STU的计算.
主要成果:
- 检测到37种农药和17种转化产品;metamitron最高 (79μg/L).
- 杀虫剂度在高水位和降雨事件发生后2小时内达到峰值.
- 55%的样本超过了法规可接受度 (RAC);观察到基线毒性,与农药水平相关.
结论:
- 目前的农药监测低估了对水生生物的风险.
- 审批前的监管风险评估对于环境保护是不够的.
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