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克莱德密度是否限制了地理范围的进化?

Marcio R Pie1, Raquel Divieso2, Fernanda S Caron3

  • 1Biology Department Edge Hill University Ormskirk Lancashire UK.

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概括
此摘要是机器生成的。

通过类密度 (CD) 衡量的物种间竞争似乎没有影响陆地脊椎动物的地理范围演变. 这项研究发现,在许多物种中,CD和范围进化率之间没有显著的关联.

关键词:
跨特定的竞争 跨特定的竞争范围的限制范围的限制范围的限制范围大小演变的演变范围大小演变.进化速度的演变速度.种类分布,物种分布.它们是陆地脊椎动物.

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科学领域:

  • 生态生态学 生态生态学
  • 进化生物学 进化生物学
  • 生物地理学 生物地理学 生物地理学

背景情况:

  • 生物相互作用的影响,如物种间的竞争,对物种的地理范围的演变是不清楚的.
  • 竞争者的高密度可能会限制范围转移 (地理包装) 或加速它们 (范围转移以避免竞争).
  • 种群密度 (CD) 被引入作为一个指标来量化物种分布中潜在的物种间竞争.

研究的目的:

  • 调查类密度 (CD) 与陆地脊椎动物地理范围演化的速度之间的关联.
  • 确定CD所代表的物种间竞争是否会影响物种的地理分布随着时间的推移而变化.

主要方法:

  • 利用了5936个陆地脊椎动物物种的数据集.
  • 采用两种方法来测试CD与范围演变之间的关系:姐妹物种之间的地理距离和范围演变的估计尖端率.
  • 考虑了分析中的遗传学不确定性.

主要成果:

  • 关节密度 (CD) 和分隔姐妹物种的地理距离之间没有发现显著的关系.
  • 估计的地理范围演变率没有显示出与CD.的变化有一致的关联.
  • 这些发现即使在对遗传学不确定性进行控制后也是如此.

结论:

  • 该研究没有发现任何证据表明,按类密度衡量的物种间竞争在陆地脊椎动物的地理范围进化中起着重要作用.
  • 结果挑战了强调竞争作用的物种多样化的平衡模型.
  • 表明跨物种竞争可能不是这个群体地理范围演变的普遍驱动因素.