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总结
研究团队通过整合大型化石数据库发现，“鱼类时代”的兴起并非平稳演化的结果，而与一次大规模生态崩塌相关：约4.45亿年前奥陶纪末的海洋大灭绝造成广泛物种死亡，削弱既有生态竞争与捕食压力，释放大量生态位空间。此后有颌鱼类等脊椎动物谱系更易扩张并加速多样化，逐步为后续泥盆纪鱼类繁盛奠定基础。研究强调，大灭绝会深刻改写演化路径与群落结构。
正文
The 'Age of Fishes' began with mass death, fossil database reveals Phys.org The Age of Fishes began with mass death EurekAlert! Mass death paved the way for the Age of Fishes Popular Science The extinction event that quietly rewrote evolution Courthouse News Mass Extinction 445 Million Years Ago Paved the Way for Jawed Fishes to Take Over Discover Magazine
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