人口衰退的基因组特征在一个长途移民中,在一个范围极端的人口中
George Day1,2,3, Thomas Bolderstone1, Greg J Conway4
1Department of Environment and Geography, University of York, York, UK.
Molecular ecology
|June 5, 2025
概括
迁徙的欧洲夜的遗传多样性下降,因息地碎片化增加了近亲繁殖. 这种基因侵蚀,观察了超过180年,突出了专业的候鸟在它们的范围极限潜在的风险.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 遗传学 是一个遗传学.
背景情况:
- 迁徙鸟类经常通过性来保持遗传多样性,但专业的需求和范围边缘分布可能会带来挑战.
- 欧洲夜 (Caprimulgus europaeus) 是一个长途迁徙者和专家,在欧洲各地经历了种群减少.
- 量化这些下降的遗传影响对于了解人口健康至关重要.
研究的目的:
- 调查英国群岛内欧洲夜人口减少的遗传后果.
- 评估大约180年的遗传多样性,近亲繁殖和人口结构的变化.
主要方法:
- 60个历史性的 (1841-1980年) 和36个当代的欧洲夜的基因组重新测序.
- 分析异构性,近亲繁殖和空间遗传结构.
主要成果:
- 与历史样本相比,在当代夜中观察到34.8%的异构性损失,这是统计学上显著的.
- 在现代人群中,发现了内生繁殖的增加和从泛混症向弱空间遗传结构的转变.
- 这些遗传变化发生在大约180年的时间里.
结论:
- 息地碎片化影响了在范围边缘的专业迁徙鸟类的遗传多样性和结构,如欧洲夜所示.
- 虽然并不是立即的保护问题,但观察到的遗传多样性下降和内生繁殖增加的轨迹可能与其他远距离迁徙者共享.
- 空间时空种群遗传学分析对于评估迁徙鸟类种群,即使是具有高流动性的鸟类,也是非常有价值的.
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