侵入性冬季和本地布鲁斯虫之间的飞行时间的季节性差异促进了繁殖隔离
Jeremy C Andersen1, Nathan P Havill2, Jennifer L Chandler1
1Department of Environmental Conservation, University of Massachusetts Amherst, Amherst, MA 01003, USA.
Environmental entomology
|July 17, 2023
概括
欧洲冬季和本地布鲁斯虫在北美杂交. 它们的交配飞行时间的差异有助于保持繁殖隔离,冬季飞行时间较晚,可能会因为恶劣的冬季条件而限制它们的传播.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 昆虫学 昆虫学是一门学科.
背景情况:
- 欧洲冬季 (Operophtera brumata) 是北美的一个入侵物种,与本土的布鲁斯 (O. bruceata) 杂交.
- 两种物种都使用相同的性激素,并产生可行的后代,这引发了关于生殖隔离机制的问题.
- 雄性蝶之间的形态相似性需要物种识别的遗传方法.
研究的目的:
- 调查欧洲冬季和布鲁斯虫之间的交配飞行的季节性时间的潜在差异.
- 为了确定异基 (时间分离) 是否有助于这两种密切相关的白虫物种之间的繁殖隔离.
- 评估飞行时间对北美欧洲冬季虫入侵性传播的影响.
主要方法:
- 每周收集成年雄在美国东北部的横断区域.
- 使用多态微卫星标记物种识别采集的的基因定型.
- 随着时间的推移估计累积物种比例以分析飞行现象学.
主要成果:
- 在欧洲冬季和布鲁斯虫之间的季节性飞行时间中观察到显著的差异.
- 与布鲁斯虫相比,欧洲冬季虫的飞行期较晚.
- 观察到的全时差异表明它们在促进两种物种之间的繁殖隔离方面发挥了作用.
结论:
- 交配飞行时间的非慢性差异有助于侵袭性欧洲冬季和本地布鲁斯长虫之间的繁殖隔离.
- 欧洲冬季的晚期飞行可能会限制它们在北美内陆的扩张,因为它们更容易暴露于极端的冬季条件.
- 了解飞行现象学对于管理入侵物种和预测其生态影响至关重要.
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