鸟类骨进化中的环境信号
Guillermo Navalón1,2,3, Alexander Bjarnason4, Elizabeth Griffiths4
1Department of Earth Sciences, University of Cambridge, Cambridge, UK. gn315@cam.ac.uk.
Nature
|October 26, 2022
概括
宏观进化研究揭示了鸟类骨形态的不同进化速度和模式. 水鸟探索了广的形态空间,而陆鸟早早实现了多样化,鸟表现出保守的进化.
科学领域:
- 宏观进化生物学
- 比较形态
- 鸟类的进化
背景情况:
- 了解表型多样性需要分析进化速度和模式.
- 之前的研究往往仅限于特征, 阻碍了全面的分析.
- 鸟类为各种规模的宏观进化研究提供了多样化的模型.
研究的目的:
- 分析整个鸟类骨的形态多样化,从整体比例到个体骨形状.
- 调查鸟类子组和骨元素之间的进化模式的变化.
- 探索环境因素对鸟类进化动态的影响.
主要方法:
- 分析整个鸟类骨架的形态多样化 (全骨架).
- 记录个体骨的三维形状变化.
- 不同的鸟类血统和骨部分的进化模式的比较.
主要成果:
- 在鸟类亚群和骨元素中观察到的进化模式的显著变化,表明马赛克进化.
- 水鸟 (Aequorlitornithes) 广泛探索了形态空间,特别是身体比例和核心骨形状.
- 陆地鸟类 (Inopinaves) 在体型上表现出早期的分歧,并强调头部和四肢骨的局部形状变化.
- 通过者表现出保守的进化动态与较低的形态差异.
- 有证据表明,一些鸟类骨部位的早期形成,但早期的划分有限.
结论:
- 鸟类进化的特点是广泛的马赛克主义和多样化的宏观进化景观.
- 环境差异可能在冠群鸟类的辐射结构中起到了关键作用.
- 早期的环境差异可能导致了广泛的鸟类类型的进化模式的分歧.
相关概念视频
The Evidence for Evolution
43.3K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
43.3K
Limits to Natural Selection
31.6K
Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
31.6K
Convergent Evolution
28.3K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
28.3K
Speciation Rates
21.3K
Overview
21.3K
Mate Choice
10.2K
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
10.2K
Genetics of Speciation
19.4K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
19.4K


