Late-Neoproterozoic deep-ocean oxygenation and the rise of animal life
Late-Neoproterozoic deep-ocean oxygenation and the rise of animal life
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DOI：
10.1126/science.1135013
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发表时间：
2007-01-05
期刊：
影响因子：
56.9
通讯作者：
Narbonne, Guy M.
中科院分区：
文献类型：
--
作者：
Canfield, Don E.;Poulton, Simon W.;Narbonne, Guy M.
由于动物需要氧气，因此新元古代晚期氧气浓度的增加被认为是它们进化的刺激因素。深海沉积物的铁含量表明，在5.8亿年前的盖斯基尔冰川期之前和期间，深海是缺氧和含铁的，之后它变成了好氧的。埃迪卡拉生物群的第一个已知成员出现在盖斯基尔冰川作用后不久，这表明它们的进化与这一氧化事件之间存在因果关系。一个长期稳定的含氧环境可能使大约2500万年后出现了双侧活动的动物。
Because animals require oxygen, an increase in late-Neoproterozoic oxygen concentrations has been suggested as a stimulus for their evolution. The iron content of deep-sea sediments shows that the deep ocean was anoxic and ferruginous before and during the Gaskiers glaciation 580 million years ago and that it became oxic afterward. The first known members of the Ediacara biota arose shortly after the Gaskiers glaciation, suggesting a causal link between their evolution and this oxygenation event. A prolonged stable oxic environment may have permitted the emergence of bilateral motile animals some 25 million years later.