带有不那么复杂的尾骨架的鸟类类往往具有更高的物种丰富性
Andrew Brinkworth1, Emily Green2, Yimeng Li3
1Milner Centre for Evolution, Department of Life Sciences, University of Bath, Bath, BA2 7AZ, UK. andrew.r.brinkworth@bath.edu.
Nature communications
|September 19, 2023
概括
鸟类四肢的形态复杂性更大与较低的物种丰富性有关. 这表明,专门的身体计划可能会限制进化多样化和新物种的产生.
科学领域:
- 进化生物学 进化生物学
- 比较解剖学的比较解剖学
- 生物多样性科学 生物多样性科学
背景情况:
- 种类丰富性在各个分类组之间有很大差异,但这种异质性的驱动因素尚未完全理解.
- 众所周知,形态多样性 (不平等性) 与分类学多样性脱,但形态复杂性的作用仍未得到充分探索.
研究的目的:
- 研究现存鸟类的形态复杂性和物种丰富性之间的关系.
- 为了确定增加的形态复杂性是否与减少的类群多样性相关.
主要方法:
- 一个新的形态复杂度指数是基于前肢和后肢对的差异化而开发的.
- 该指数应用于983个现存鸟类物种的数据集.
- 进行了统计分析,以测试形态复杂性与物种丰富性之间的相关性.
主要成果:
- 在鸟类类的物种丰富度和它们的平均形态复杂性之间发现了显著的负相关性.
- 形态复杂度较高的类型倾向于占据较少的食和息地,这表明生态专业化更大.
- 生态专业化,作为复杂性的代理,也与物种丰富性有负相关.
结论:
- 在尾骨中较大的形态复杂性似乎阻碍了鸟类的物种多样性的产生和维持.
- 这可能是由于进化"扎根"在特定的形态和生态中,这些形态和生态不太有利于进一步的多样化.
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