Miller Arnold I, Foote Michael
Department of Geology, University of Cincinnati, Post Office Box 210013, Cincinnati, OH 45221-0013, USA.
Science. 2003 Nov 7;302(5647):1030-2. doi: 10.1126/science.1089719.
Cohorts of marine taxa that originated during recoveries from mass extinctions were commonly more widespread spatially than those originating at other times. Coupled with the recognition of a correlation between the geographic ranges and temporal longevities of marine taxa, this observation predicts that recovery taxa were unusually long-lived geologically. We analyzed this possibility by assessing the longevities of marine genus cohorts that originated in successive substages throughout the Phanerozoic. Results confirm that several mass extinction recovery cohorts were significantly longer lived than other cohorts, but this effect was limited to the post-Paleozoic, suggesting differences in the dynamics of Paleozoic versus post-Paleozoic diversification.
在从大灭绝中复苏期间起源的海洋生物分类群通常在空间上比在其他时期起源的生物分类群分布更广。再加上认识到海洋生物分类群的地理范围和时间寿命之间的相关性，这一观察结果预示着复苏分类群在地质时期异常长寿。我们通过评估显生宙连续亚阶段起源的海洋属类群的寿命来分析这种可能性。结果证实，几个大灭绝复苏类群的寿命明显长于其他类群，但这种效应仅限于古生代之后，这表明古生代与古生代之后的多样化动态存在差异。
