The Shifting Balance of Diversity Among Major Marine Animal Groups
The Shifting Balance of Diversity Among Major Marine Animal Groups
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DOI：
10.1126/science.1189910
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发表时间：
2010-09-03
期刊：
影响因子：
56.9
通讯作者：
Alroy, J.
中科院分区：
文献类型：
--
作者：
Alroy, J.
化石记录表明，每一个主要的分类群都有一个一致的净多样化率和物种丰富度的限制。据认为，可以从这些特征预测主要分类群的优势地位的长期变化。然而，新的分析表明，多样性限制可能会上升或下降，以适应辐射或反射。这些变化是特殊的，发生在不同的时间在每个类群。例如，二叠纪末的大灭绝永久性地减少了重要的，以前占主导地位的群体，如腕足动物和海百合的多样性。因此，当前的全球危机可能通过改变进化规则而永久改变生物圈的分类组成。
The fossil record demonstrates that each major taxonomic group has a consistent net rate of diversification and a limit to its species richness. It has been thought that long-term changes in the dominance of major taxonomic groups can be predicted from these characteristics. However, new analyses show that diversity limits may rise or fall in response to adaptive radiations or extinctions. These changes are idiosyncratic and occur at different times in each taxa. For example, the end-Permian mass extinction permanently reduced the diversity of important, previously dominant groups such as brachiopods and crinoids. The current global crisis may therefore permanently alter the biosphere's taxonomic composition by changing the rules of evolution.