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整个基因组测序揭示了跨越式分散,在不断扩大的海鸟范围中缓冲创始人效应

Rachael W Herman¹, Gemma Clucas², Jane Younger³

¹Department of Ecology and Evolution, Stony Brook University, Stony Brook, New York, USA.

Molecular ecology

|February 1, 2024

概括

甘图企 (Pygoscelis papua) 在范围扩张期间表现出快速的,脚石的分散模式,保持遗传多样性. 这种适应能力凸显了它们在南极地区对气候变化的弹性.

科学领域:

生态生态学生态生态学
基因组学就是基因组学.
气候变化生物学气候变化生物学

背景情况:

由于气候变化,物种的范围正在变化,特别是在高度地区.
在范围转移期间的分散和殖民模式尚未完全理解.
种群连接性揭示了物种如何适应环境变化.

研究的目的:

为了研究金毛企 (Pygoscelis papua) 的细微规模的种群结构和分散模式.
了解企如何殖民新地区并向南扩大其范围.
评估在范围边缘的遗传多样性和人口增长.

主要方法:

来自12个殖民地的129只企个体的全基因组测序.
对细度人口结构,混合物和人口差异的分析.
推断历史和最近的分散模式.

主要成果:

根图企在历史上通过从南申特兰群岛到安弗斯岛和大陆西南极洲的跨石模式分散.
最近的向南扩张也遵循了基因流量有限的脚石模式.
在分散期间保持了遗传多样性,范围边缘种群正在增长.

结论:

根图企表现出强大的,适应性的范围扩张策略.
移民缓冲了创始人效应,在殖民时期保持了遗传多样性.
这种物种对气候变化有很强的抵抗力,其种群规模不断增加.

关键词:

殖民化殖民化的殖民化创始人的影响.范围扩展扩展范围扩展海洋鸟类海鸟作为一个踏板,分散的石头散布.整个基因组的测序.

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