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在沙丁蛇的大辐射中,骨进化的生态相关性

Gregory G Pandelis^1,2,3, Michael C Grundler^4,5, Daniel L Rabosky^4,5

¹Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109, USA. gregory.pandelis@uta.edu.

BMC ecology and evolution

|September 7, 2023

概括

生态专业化,特别是息地使用,在800多种南美和中美洲的形蛇物种中显著塑造了头骨形态. 水生和化石生活方式显示了最明显的骨形状变化.

科学领域:

进化生物学是进化的生物学.
比较解剖学的比较解剖学.
类学类学类学类学

背景情况:

滴沙丁蛇在南美和中美洲表现出非凡的物种丰富 (800多种) 和生态多样性.
了解生态专业化如何影响表型多样性,特别是形状,在这个群体内仍然是有限的.
这项研究调查了息地和饮食在沙丁蛇形态多样化中的作用.

研究的目的:

为了确定息地使用和饮食对头骨形状多样化的影响,在160个沙物种中.
为了比较息地和饮食对形态变异的相对贡献.
为了确定驱动骨形状进化的特定生态因素,在这种蛇辐射中.

主要方法:

利用微型CT扫描和3D几何形态测量来分析头骨形状.
应用了基因组比较方法来评估进化相关性.
采用模拟来验证结果并解决形状数据分析中的统计异常.

主要成果:

息地使用和饮食都能在许多头骨区域显著预测头骨形状.
息地使用比饮食更强烈地预测了头骨形状.
化石 (挖掘) 和水生行为与最明显的头骨形状偏差有关.

结论:

息地和饮食生态与dipsadine头骨形状有显著的相关性.
水生和化石生活方式显示了头骨形态和生态之间最强烈的关联.
生态因素在推动沙丁蛇辐射的形态多样化方面发挥了关键作用,这与适应性辐射模型相一致.

关键词:

适应性辐射是一种适应性辐射.迪普斯迪纳尼 (Dipsadinae) 是一个古老的生态形态学生态形态学几何形态仪表的几何形态仪表.形态多样化的多样化头骨形态学头骨形态学

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