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Updated: May 30, 2025

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

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混合物和环境波动塑造了东非坦加尼加湖掠食者辐射的进化历史

Jessica A Rick¹, Julian Junker^2,3, Alexander L Lewanski⁴

¹School of Natural Resources and the Environment, The University of Arizona, Tucson, AZ 85721, USA.

bioRxiv : the preprint server for biology

|January 27, 2025

概括

坦加尼加湖Lates捕食者的近期殖民化和多样化是由环境变化和杂交驱动的. 这些活动提供了对入侵物种对生物多样性的影响的见解.

科学领域:

生态生态学生态生态学
进化生物学进化生物学
基因组学就是基因组学.

背景情况:

顶级捕食者显著影响食物网和生态系统动态.
将新型捕食者引入天真环境可以大幅改变本土生物多样性.
坦加尼加湖拥有独特的多样性,在Lates属中拥有特有海性顶级捕食者的独特多样性.

研究的目的:

调查坦加尼加湖Lates物种的进化历史和多样化.
为了确定Lates殖民和在湖内多样化的时间.
了解环境波动和杂交在拉特斯进化中的作用.

主要方法:

使用减少表示和全基因组重新排序数据的族群遗传和人口模型.
对基因组数据的分析,以推断殖民时期和多样化模式.
与古气候数据 (湖水位波动) 相关的人口历史建模.

主要成果:

坦加尼加湖的后者殖民是最近的 (大约1 - 2百万年前).
多样化发生在湖水位发生重大变化的时期,作为物种.
在Lates物种中检测到多种混合的情况,与普莱斯托时代中后期的湖水位波动有关.
拉特斯辐射的进化历史是动态的,并且与环境相关.

结论:

环境波动,特别是影响湖泊水位的冰川-冰川间周期,在拉特斯的多样化中起到了至关重要的作用.
杂交事件塑造了坦加尼加湖Lates的进化轨迹.
拉特斯最近的辐射和适应历史为了解捕食者引入的生态和进化后果提供了一个模型.

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