绘制小鸟进化过程的图表:从分子系系学和化石记录整合的见解
Travis Park1,2,3, Gustavo Burin2, Daniela Lazo-Cancino4
1School of Biological Sciences, Monash University, Melbourne, Australia.
Evolution; international journal of organic evolution
|April 22, 2024
概括
类动物 (海,海狮,海) 的进化显示出大多是恒定的多元化速度. 海经历了快速的周转与更高的灭绝率,可能是由于环境变化和竞争.
科学领域:
- 古生物学的古生物学.
- 宏观进化是如何发生的
- 海洋哺乳动物科学科学
背景情况:
- 足动物是一个非常成功的海洋哺乳动物类,拥有广泛的化石和分子数据.
- 之前的研究缺乏对遗传学和化石数据的综合分析,以了解所谓的宏观进化动态.
- 对类动物多样化和生物地理学的全面理解需要将分子族系与化石记录结合起来.
研究的目的:
- 为了构建迄今为止采样最密集的小类类型系,包括近期和化石分类.
- 通过遗传学古生物学的方法来调查类多样化速率和历史生物地理模式.
- 为了识别主要足动物血统的祖先范围和群体的起源.
主要方法:
- 一种元分析方法被用来构建一个综合的36个近期和93个化石类动物的分类系统.
- 遗传学古生物学方法被应用来分析多样化动态和生物地理历史.
- 化石数据,包括干式泛类种类,被纳入来追踪进化起源.
主要成果:
- 作为一个整体,Pinnipeds主要以恒定利率表现出多样化.
- 海在1200万到600万年前出现了快速转换的时期,灭绝速度超过了物种化速度.
- Otarioidea (耳和海) 的祖先范围被确定为北太平洋,皇冠海 (无耳) 作为北大西洋/Paratethys.
- 尽管包括了早期的化石种类,但Pan-Pinnipedia的起源仍然模糊不清.
结论:
- 海的多元化动态受到海平面波动和物种间竞争等因素的重大影响.
- 历史生物地理学分析证实了主要类类的关键祖先地区.
- 这项研究强调了对类动物起源的进一步研究的需要,并为研究其他多样化的类型提供了强大的框架.
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