种类丰富性模式的原因在分类之间
Dan Yu1,2, John J Wiens2
1The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Science, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, People's Republic of China.
Proceedings. Biological sciences
|January 23, 2024
概括
群体年龄,而不是多样化速率,主要解释了所有生命中的物种丰富模式. 较老的基层往往更丰富,突出了进化时间在塑造生物多样性的关键作用.
科学领域:
- 进化生物学是进化的生物学.
- 生物多样性科学是生物多样性的科学.
- 人类遗传学 是一个学科.
背景情况:
- 物种丰富模式在空间上 (例如,度多样性梯度) 和分类之间 (例如,血管精子占主导地位) 都被观察到.
- 现有的研究争论的是,分类群的丰富性是否是由多样化率或分类群年龄驱动的,通常使用潜在的偏见对命名的分类群进行比较.
- 以前比较相同分类学等级的命名类的研究可能会混年龄和等级,可能低估了类年龄的作用.
研究的目的:
- 在生命树上调查基于分类的物种丰富模式的主要驱动因素.
- 使用一种新的方法论方法,区分分类年龄假设和多样化率假设.
- 提供对影响主要生物群体生物多样性模式的因素的全面分析.
主要方法:
- 构建一个大规模的,时间校准的,物种级别的基因组,包括多样化的生命形式.
- 随机采样从基因组中的克拉德,以避免与相似等级的命名克拉德进行比较相关的偏见.
- 统计分析将类丰富度与类年龄以及多样化率 (种类减去灭绝) 相对应.
主要成果:
- 群体年龄被确定为动物,植物,真菌,细菌和古生物等主要群体物种丰富性的最强有力的预测因素.
- 在动物和植物中观察到富和多样化率之间的关系较弱,但存在.
- 结果与之前使用命名类的分析形成鲜明对比,该分析发现类年龄对财富的影响很小.
结论:
- 群体年龄是解释生命树上的物种丰富模式的主要因素.
- 这些发现强调了进化时间在塑造生物多样性的基本重要性.
- 这项研究提供了强有力的证据,支持分类时代假设,而不是多样化率假设,用于解释广泛的财富模式.
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