Depressed rates of origination and extinction during the late Paleozoic ice age: A new state for the global marine ecosystem
Depressed rates of origination and extinction during the late Paleozoic ice age: A new state for the global marine ecosystem
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DOI：
10.1130/g19654r.1
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发表时间：
2003-10
期刊：
影响因子：
5.8
通讯作者：
S. Stanley;M. Powell
中科院分区：
文献类型：
--
作者：
S. Stanley;M. Powell
海洋动物属的起源和灭绝速率在密西西比晚期下降到较低水平，紧接着南半球形成了巨大的冰川，并发生了二级大规模灭绝。进化的更替率和多样性在2.5亿年里一直很低，在早二叠世广泛的冰川作用结束时，地壳明显向上移动。在这个主要的冰河时期，所有具有良好化石记录的不同类群都经历了低的起源和灭绝率。这种缓慢的速度将被预测为浅海动物群或邻近一个严重的冰川超大陆，如盘古大陆，凉爽和高度季节性的热制度应该决定物种有广泛的生态位，广泛的地理分布，以及大而相对稳定的人口。
Rates of origination and extinction for marine animal genera dropped to low levels in latest Mississippian time, immediately after massive glaciers formed in the Southern Hemisphere and a second-order mass extinction occurred. Evolutionary turnover and diversity remained low for ∼50 m.y., shifting markedly upward precisely when extensive glaciation ended in Early Permian time. All diverse taxa with good fossil records experienced low rates of origination and extinction during this major ice age. Such sluggish rates would be predicted for faunas of shallow seas on or adjacent to a heavily glaciated supercontinent such as Pangea, where cool and highly seasonal thermal regimes should dictate that species have broad ecological niches, widespread geographic distributions, and large and relatively stable populations.