标题： （天文诱导的）生命灭绝的遗传特征 显示英文标题

标题： The genetic signature of (astronomically induced) life extinctions

摘要： 对超新星和伽马射线暴事件的现有理解表明，如果它们中的一个或多个在过去撞击地球，将会对生物圈产生重要影响。 本文评估了过去地质时期过量辐射导致的生命灭绝可能在幸存物种中留下遗传印记的可能性。 我们强调这些灭绝的特征，提出了一种定量模型，基于突变频率和DNA修复速率的动力学特性来评估物种的存活概率。 显示英文摘要

摘要： The current understanding of supernova and gamma-ray burst events suggests important effects on the biosphere if one of more of them happened to strike the earth in the past. In this paper we evaluate the possibility that life extinctions which probably occurred due to excess of radiation occurring in the geologic past might have left a genetic signature on surviving species. We emphasize the signatures of these extinctions, proposing a quantitative model to evaluate the surviving probability of the species, based on kinetic aspects of the frequency of mutations and the DNA repair rate.