人类诱导的范围扩张导致子的姐妹物种之间最近的混合区
Philip Lavretsky1, Kevin J Kraai2, David Butler3
1Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79668, USA.
Genes
|June 27, 2024
概括
由于环境变化,南德克萨斯州的两种子,斑点子 (Anas fulvigula) 和墨西哥子 (Anas diazi),正在扩大它们的范围,并在南德克萨斯州进行杂交. 这种范围的扩大和杂交需要进行保护监测.
科学领域:
- 生态生态学 生态生态学
- 保护生物学 保护生物学
- 人口基因组学 人口基因组学
背景情况:
- 人类引起的生态变化给景观带来了压力,导致物种分布的变化.
- 物种正在扩大它们的地理位空间,导致范围向新区域转移.
- 两个姐妹的物种,斑点 (Anas fulvigula) 和墨西哥 (Anas diazi),在德克萨斯州南部的正式范围之外被观察到.
研究的目的:
- 为了评估因斑点和墨西哥在南德克萨斯州的范围扩大而产生的保护问题.
- 调查这两种非迁徙子物种之间潜在的二次接触和杂交.
- 了解物种对人类世环境变化的反应.
主要方法:
- 采用人口基因组学方法,使用数千个自身基因组位点.
- 在两种物种的范围内评估了遗传祖先.
- 从德克萨斯州南部的重叠区域收集了墨西哥和斑点的样本.
主要成果:
- 据证实,斑点和墨西哥都在扩大它们的范围.
- 遗传纯粹的斑点被发现,最远的西部是德克萨斯州的拉萨尔县.
- 墨西哥子在美墨边境附近被记录下来,首批确诊的杂交品种在两种物种的范围之间的约100公里宽的接触区中被发现.
结论:
- 气候和土地利用变化,包括息地退化和人工息地,正在促进这些范围的扩张.
- 最近的接触和杂交事件提供了对人类世物种反应的见解.
- 建议进行持续的监测,以保护和修订斑点的操作调查区域.
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