农业化学品增加了正在衰退的两动物物种中的三虫感染
Jason R Rohr1, Anna M Schotthoefer, Thomas R Raffel
1Biology Department, University of South Florida, Tampa, Florida 33620, USA. jasonrohr@gmail.com
Nature
|October 31, 2008
概括
除草剂阿特拉和酸农业化学物质通过促进牛宿主和削弱青免疫力,增加两动物中的三虫寄生虫感染. 这项研究强调了它们在两动物数量下降中的作用.
科学领域:
- 环境毒理学环境毒理学
- 两动物生态 两动物生态
- 寄生虫学的寄生虫学
背景情况:
- 全球两动物数量下降是一个重要的保护问题.
- 疾病是主要的疑似驱动因素,但具体原因尚不清楚.
- 了解农业化学对疾病动态的影响对于补救至关重要.
研究的目的:
- 为了确定幼三动物在北方青 (Rana pipiens) 减少中的丰富度的关键驱动因素.
- 研究将农业化学品与两动物寄生虫负载联系起来的因果机制.
- 评估阿特拉和酸盐在两动物疾病风险中的相对重要性.
主要方法:
- 现场研究分析了超过240个潜在的预测特里马丰富性的预测因素.
- 统计分析,以确定幼虫三动物丰富度的最佳预测指标.
- 中宇宙实验测试了阿特拉对子免疫力和寄生虫负载的因果作用.
主要成果:
- 阿特拉辛是幼虫三虫丰度的最强预测因素,解释了51%的变化.
- 阿特拉和酸盐的组合解释了三极丰度变化的74%.
- 在一个中宇宙实验中,阿特拉津暴露导致了免疫抑制的头,增加了牛宿主,以及更高的三极管负载.
结论:
- 亚特拉和酸盐农业化学物质显著增加两动物对三动物感染的易感性.
- 这些农业化学物质通过增加中间牛宿主和抑制两动物免疫力而起作用.
- 这些发现引发了人们对阿特拉和酸盐对全球两动物数量减少的贡献的担忧.
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