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季节性迁徙者Euxoa auxiliaris (Lepidoptera: Noctuidae) 的临界热极限
Taylor E Kennedy1, Sharlene E Sing2, Robert K D Peterson1
1Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, MT, USA.
Environmental entomology
|February 25, 2025
概括
军用虫飞表现出高的上热极限,但具有生存寒冷的特殊能力,对灰熊的食物来源至关重要. 了解它们的耐热性对于在气候变化中进行保护至关重要.
科学领域:
- 生态生态学 生态生态学
- 昆虫生理学 昆虫生理学
- 气候变化生物学 气候变化生物学
背景情况:
- 军刀虫 (Euxoa auxiliaris) 幼虫是一种农业害虫.
- 成年蝶迁移到高山地区,成为灰熊 (Ursus arctos horribilis) 的重要食物来源.
- 成人E. auxiliaris的热耐受性尚不清楚,这影响了生态预测.
研究的目的:
- 为了研究成年E.辅助的热耐受性.
- 在实验室养和野生捕获的个体中评估临界热极限 (CTLmax和CTLmin).
- 了解它们的热极限对物种分布和灰熊食物供应的生态影响.
主要方法:
- 使用了升级耐受性测试,从25°C开始,温度增加0.3°C/分钟.
- 对个体进行监测,直到失去了正反应,以确定临界热极限.
- 实验室养和野生捕获的E. auxiliaris种群之间的热耐受性比较.
主要成果:
- 成人E. auxiliaris的CTLmax是温带类动物的典型CTLmax (实验室养:44.13°C,野生捕获:43.28°C).
- 展现出非凡的CTLmin (实验室养:-2.24°C,野生捕获:-1.9°C),允许在低环境温度下进行活动.
- 这些极限建议适应炎热的夏季和寒冷的高山条件.
结论:
- 这些发现为E. auxiliaris.的热生态提供了关键的见解.
- 了解热耐受性对于预测物种范围分布和这种灰熊食物来源的可用性至关重要.
- 研究热耐受性对于预测气候变化导致的生态变化以及确保保护E.auxiliaris和灰熊至关重要.
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