Quantifying the effects of the break up of Pangaea on global terrestrial diversification with neutral theory.
Quantifying the effects of the break up of Pangaea on global terrestrial diversification with neutral theory.
复制标题
DOI：
10.1098/rstb.2015.0221
复制
发表时间：
2016-04-05
期刊：
影响因子：
--
通讯作者：
Rosindell J
中科院分区：
文献类型：
--
作者：
Jordan SM;Barraclough TG;Rosindell J
大多数分类类群的历史丰富性在地质时期显著增加。对这一现象的解释大致可分为两类：化石记录的偏差和近期生物多样性净比率的上升。例如，泛大陆的分裂和大陆之间的隔离可能增加了净多样化率。在本研究中，我们研究了大陆漂移所带来的大陆块间隔离增加对陆地多样化率的影响。我们利用生态中性理论作为一种手段，对地质复杂情景进行了可追溯的研究。我们的模型显示了模拟地质事件对所有物种的影响是平等的，没有进一步的生态过程的复杂性。我们发现，只有当大陆之间的隔离通过变异导致额外的物种形成，以及考虑到全球多样性非常低的高级分类群时，大陆漂移才会导致多样性的增加。我们的结论是，大陆漂移本身不足以解释化石记录中观察到的陆生物种丰富度的增加。
The historic richness of most taxonomic groups increases substantially over geological time. Explanations for this fall broadly into two categories: bias in the fossil record and elevated net rates of diversification in recent periods. For example, the break up of Pangaea and isolation between continents might have increased net diversification rates. In this study, we investigate the effect on terrestrial diversification rates of the increased isolation between land masses brought about by continental drift. We use ecological neutral theory as a means to study geologically complex scenarios tractably. Our models show the effects of simulated geological events that affect all species equally, without the added complexity of further ecological processes. We find that continental drift leads to an increase in diversity only where isolation between continents leads to additional speciation through vicariance, and where higher taxa with very low global diversity are considered. We conclude that continental drift by itself is not sufficient to account for the increase in terrestrial species richness observed in the fossil record.