温暖的气温减少病毒的传播在一个群居的森林昆虫昆虫
Paul MacDonald1, Judith H Myers2, Jenny S Cory1
1Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada.
Ecology
|August 26, 2023
概括
气候变暖影响了昆虫疾病的传播. 寒冷的温度意外地增加了西帐毛虫百科病毒的传播,这是由于幼虫的运动减少,尽管在更高的温度下食量更高.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 昆虫病理学 昆虫病理学
背景情况:
- 预计气候变暖将改变物种相互作用和疾病动态.
- 和昆虫一样,外热植物对温度变化特别敏感,这会影响它们的生理和行为.
- 西部帐毛虫 (WTC) 和它的百科病毒为研究温度对疾病传播的影响提供了一个模型系统.
研究的目的:
- 测试病原体传播和宿主死亡率是否随着温度升高而增加.
- 调查温度如何影响WTC中细菌病毒传播的机制.
- 为了确定是否增加幼虫活动或改变死亡率驱动温度依赖的传播.
主要方法:
- 实验室实验测量WTC在不同温度 (15-30°C) 的养和死亡率.
- 温室实验比较了在较冷 (19.5°C) 和较热 (29°C) 条件下的病毒传播.
- 分析幼虫的移动,食,死亡率和病毒传播参数.
主要成果:
- 幼虫的食和运动随着温度的增加而增加.
- 在更高的温度下,宿主死亡率更高,但病毒传播阶段不受影响.
- 在较冷的条件下,病毒传播和死亡率参数更高.
- 感染幼虫在较冷的条件下减少移动,增加了群体性WTC中的感染风险.
结论:
- 与预测相反,较低的温度在西部帐毛虫中增强了baculovirus的传播.
- 受感染幼虫在较低温度下减少移动,增加了群体群体中疾病的传播.
- 观察到的局部传播变化可能无法扩展到人口层面的感染动态,如现场数据所示.
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