Selective calcareous nannoplankton survivorship at the Cretaceous-Tertiary boundary
Selective calcareous nannoplankton survivorship at the Cretaceous-Tertiary boundary
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DOI：
10.1130/g21566.1
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发表时间：
2005-08-01
期刊：
影响因子：
5.8
通讯作者：
Bown, P
中科院分区：
文献类型：
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作者：
Bown, P
钙质超微浮游生物在白垩纪-第三纪边界（65.5 Ma）经历了毁灭性的多样性丧失，但在古新世早期从少数幸存者物种中迅速恢复。由于返工和混合带来的不确定性，对这一幸存者的理解受到了阻碍，但来自西北太平洋（沙茨基海隆，海洋钻探计划站点 1210）的新高分辨率组合数据可以明确识别 10 名幸存者。这些物种之间共享的适应策略的证据首次表明灭绝是选择性的，生存仅限于少数浅海和/或机会主义物种，这可能是由坚韧和/或生命周期逃逸策略促进的。
Calcareous nannoplankton underwent devastating diversity loss at the Cretaceous-Tertiary boundary (65.5 Ma), but recovered rapidly in the early Paleocene from a small number of survivor species. An understanding of this survivorship has been hampered by uncertainties introduced by reworking and mixing, but new high-resolution assemblage data from the northwest Pacific (Shatsky Rise, Ocean Drilling Program Site 1210) allow the unequivocal identification of 10 survivors. Evidence of shared adaptive strategies among these species provides the first indication that the extinctions were selective, with survival limited to a few neritic and/or opportunistic species, probably facilitated by hardiness and/or life-cycle escape strategies.