Why does diversification slow down?
Why does diversification slow down?
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DOI：
10.1016/j.tree.2014.01.010
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发表时间：
2014-04-01
影响因子：
16.8
通讯作者：
Morlon, Helene
中科院分区：
文献类型：
--
作者：
Moen, Daniel;Morlon, Helene
系统发育多样性的研究经常显示进化枝历史上多样性速率减缓的证据。最近的研究寻求对这种格局的生物学解释，强调了生态位分化的作用，如适应性辐射和多样性的生态限制的假设。然而，许多其他生物学解释可能是多样化放缓的基础。在本文中，我们专注于多样化的地理背景下，环境驱动的物种形成的爆发，未能跟上不断变化的环境，和持久的物种形成的分支。我们认为，尽管目前被低估，这些替代品代表生物学上合理的解释，应该考虑沿着与生态位分化。测试这些替代假设的重要性可能会产生根本不同的解释是什么影响物种丰富度的分支通过时间。
Studies of phylogenetic diversification often show evidence for slowdowns in diversification rates over the history of clades. Recent studies seeking biological explanations for this pattern have emphasized the role of niche differentiation, as in hypotheses of adaptive radiation and ecological limits to diversity. Yet many other biological explanations might underlie diversification slowdowns. In this paper, we focus on the geographic context of diversification, environment-driven bursts of speciation, failure of clades to keep pace with a changing environment, and protracted speciation. We argue that, despite being currently underemphasized, these alternatives represent biologically plausible explanations that should be considered along with niche differentiation. Testing the importance of these alternative hypotheses might yield fundamentally different explanations for what influences species richness within clades through time.