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食中对两足动物Hyalella azteca和中 Chironomus dilutus的影响
John Besser1, Danielle Cleveland1, David D Harper2
1Columbia Environmental Research Center, U.S. Geological Survey, Columbia, Missouri, United States.
Environmental toxicology and chemistry
|September 19, 2025
概括
使用基于酵母的饮食评估了水生无脊椎动物的慢性 (Se) 毒性. 结果表明,目前的水质标准对鱼类和无脊椎动物都有保护作用.
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:
- 长期 (Se) 水质标准依赖于鱼类的饮食暴露和生殖效应.
- 对水生无脊椎动物的慢性毒性数据有限,尽管它们在食物网中的重要性很大.
- 了解无脊椎动物对的敏感性对于全面的水质评估至关重要.
研究的目的:
- 为了评估基于酵母的饮食,对Hyalella azteca和Chironomus dilutus进行慢性毒性研究.
- 为了确定对关键水生无脊椎动物的慢性食毒性.
- 为了将无脊椎动物的敏感性与现有的鱼类水质标准进行比较.
主要方法:
- 基于酵母的饮食对Hyalella azteca和Chironomus dilutus进行了优化.
- 测量器和慢性毒性测试评估了生存,生长,生物量和繁殖.
- 测量了组织度,并计算了效果度 (EC10s).
- 一个食物网模型将无脊椎动物组织EC10s转换为相当于鱼类组织度.
主要成果:
- 在特定度下,食显著降低了H. azteca和C. dilutus的存活率,生长率和生物量.
- 在44.5μg/g干量下,H. azteca的存活率和生长率降低,而C. dilutus在更高度下受到影响.
- 对H. azteca和C. dilutus的组织EC10通常低于鱼类的EC10,但可靠性不同.
- 从无脊椎动物数据中获得的模拟鱼组织Se度使它们在敏感度上排名相对较低.
结论:
- 评估的基于酵母的饮食适用于慢性无脊椎动物毒性测试.
- 目前美国环境保护局 (EPA) 的基于组织的水质标准似乎对鱼类和无脊椎动物都有保护作用.
- 这些发现支持在没有鱼的水生环境中使用现有的管理标准.
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