草甘-环境变量相互作用:它如何影响寄生虫Chordodes nobilii?
Cecilia Achiorno1, Graciela Minardi1
1Centro de Estudios Parasitológicos y de Vectores (CEPAVE), Universidad Nacional de La Plata (CCT La Plata CONICET-UNLP), La Plata, 1900, Buenos Aires, Argentina.
Chemosphere
|May 4, 2024
概括
草甘对淡水虫幼虫的毒性取决于环境因素,如温度和pH值. 特定条件改变了它的影响,引起了人们对气候变化下的宿主寄生虫动态的担忧.
科学领域:
- 环境毒理学环境毒理学
- 寄生虫学的寄生虫学
- 生态毒理学 生态毒理学
背景情况:
- 草甘是一种广泛使用的除草剂,具有潜在的环境影响.
- 关于环境压力因素如何影响草甘对非标生物的毒性,数据有限.
- 像Chordodes nobilii这样的虫寄生虫对环境变化敏感,但组合的压力效应是未知的.
研究的目的:
- 调查温度,pH值和暴露时间对甘酸盐对淡水虫幼虫 (Chordodes nobilii) 毒性的综合影响.
- 评估这些环境变量如何改变草甘对幼虫感染性的影响.
主要方法:
- 幼虫暴露于草甘度,暴露时间 (24小时,48小时),温度 (18°C,23°C,28°C) 和pH (7,8,9) 的因数组合.
- 使用Aedes aegyptii作为宿主进行了幼虫感染性测试.
- 用通用线性混合模型 (GLMM) 来分析相互作用效应.
主要成果:
- 在草甘,温度,pH值和时间之间观察到显著的三重相互作用.
- 草甘的毒性各不相同,在24小时暴露,pH值7和23°C时发现毒性降低.
- 与单独的温度相比,草甘和28°C的组合略有降低了感染力.
结论:
- 草甘对C. nobilii幼虫的毒性受到环境因素的组合的显著影响.
- 这些发现强调了在生态毒理学评估中需要考虑环境变异性的必要性.
- 讨论了气候变化情景下对宿主寄生虫动态和生态系统功能的潜在影响.
- C. nobilii幼虫显示出作为环境压力的生物指标的潜力.
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