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短期的温度波动增加了多夫尼亚寄生虫传染病系统中的疾病
Leila Krichel1, Devin Kirk2, Clara Pencer1
1Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Canada.
PLoS biology
|September 8, 2023
概括
短期的温度波动,与预测相反,增加传染病的流行率. 这表明宿主-寄生虫动态和气候变化之间的复杂相互作用正在推动疾病的传播.
科学领域:
- 生态生态学 生态生态学
- 流行病学 流行病学
- 气候变化生物学 气候变化生物学
背景情况:
- 气候变化显著影响传染病的动态.
- 短期温度波动对疾病传播的影响尚不清楚.
- 理论预测表明,在病原体的热量最佳状态下,热量的波动会抑制感染的发生率.
研究的目的:
- 实证地测试理论预测,即短期的温度波动抑制了流行性感染的流行率.
- 为了研究温度变化对宿主寄生虫系统中疾病传播的影响.
- 探索驱动温度波动和感染流行率之间的关系的潜在机制.
主要方法:
- 机械性疾病传播模型以代谢缩放理论的热性能曲线 (TPC) 进行参数化.
- 随机模拟和非线性平均值以分析模型预测.
- 在不同的温度条件下,对大方氏菌种群中微寄生虫 (Ordospora colligata) 流行病的实验观察.
主要成果:
- 实验观察与理论预测相矛盾.
- 温度变化显著增加了流行性感染的流行率.
- 观察到的模式表明感染负担分布的变化,可能是由于寄生虫更快地适应波动的温度.
结论:
- 短期的温度波动可以增加传染病的患病率,这与现有的理论相反.
- 宿主内部的动态和宿主-寄生虫在不同尺度上的相互作用对于了解气候变化对疾病的影响至关重要.
- 标准传播模型与代谢缩放理论相结合,可能无法完全捕捉温度变异对疾病动态的影响.
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