Jablonski D, Raup D M
Department of Geophysical Sciences, University of Chicago, IL 60637, USA.
Science. 1995 Apr 21;268(5209):389-91. doi: 10.1126/science.11536722.
Analyses of the end-Cretaceous or Cretaceous-Tertiary mass extinction show no selectivity of marine bivalve genera by life position (burrowing versus exposed), body size, bathymetric position on the continental shelf, or relative breadth of bathymetric range. Deposit-feeders as a group have significantly lower extinction intensities than suspension-feeders, but this pattern is due entirely to low extinction in two groups (Nuculoida and Lucinoidea), which suggests that survivorship was not simply linked to feeding mode. Geographically widespread genera have significantly lower extinction intensities than narrowly distributed genera. These results corroborate earlier work suggesting that some biotic factors that enhance survivorship during times of lesser extinction intensities are ineffectual during mass extinctions.
对白垩纪末期或白垩纪-古近纪大灭绝的分析表明，海洋双壳类属在生活位置（穴居与暴露）、体型、大陆架上的深度位置或深度范围的相对宽度方面没有选择性。作为一个群体，沉积食性者的灭绝强度明显低于悬浮食性者，但这种模式完全是由于两个类群（胡桃蛤目和满月蛤超科）的低灭绝率造成的，这表明生存能力并非简单地与摄食方式相关。地理分布广泛的属的灭绝强度明显低于分布狭窄的属。这些结果证实了早期的研究工作，即一些在灭绝强度较小的时期增强生存能力的生物因素在大灭绝期间是无效的。
