The Great Ordovician Biodiversification Event (GOBE) refers to one of the greatest increases in biodiversity during the Phanerozoic. Recent studies have shown that this taxonomic increase can be attributed to elevated origination rates around the Dapingian–Darriwilian boundary in the Middle Ordovician, while extinction rates stayed relatively constant throughout the Ordovician. Even though this global pattern of origination and extinction appears similar across diverse groups and geographical areas, earlier studies suggested that hard substrate taxa may have diversified prior to the GOBE, during the Early Ordovician. Here, we quantify Ordovician diversification dynamics of hard substrate taxa while simultaneously accounting for temporally varying sampling probabilities. Diversification rates of hard substrate taxa, both as a whole and when analysed as separate groups, appear to be very similar to those of free‐living benthic taxa. The observation that the diversification dynamics of many different taxonomic and ecological groups show the same temporal pattern, suggests a common cause of Ordovician diversification dynamics.

中文翻译：

---

大奥陶纪生物多样性事件发生之前，硬质底物类群是否已经多样化？

大奥陶纪生物多样性事件（GOBE）是指生代时期生物多样性的最大增长之一。最近的研究表明，这种分类学上的增加可以归因于奥陶纪中部大坪-达里维安边界附近的起源速率升高，而整个奥陶纪的灭绝速率却保持相对恒定。尽管这种全球性的起源和灭绝模式在不同的群体和地理区域中看起来相似，但较早的研究表明，在奥陶纪早期，硬底物类群可能在GOBE之前就已经多样化。在这里，我们量化了硬底物类群的奥陶纪多元化动态，同时考虑了随时间变化的采样概率。硬质底物分类群的多样化率，总体上和作为单独的组进行分析时，都与自由活动的底栖生物分类非常相似。许多不同分类学和生态学群体的多样化动态显示出相同的时间格局的观察结果，表明了奥陶纪多样化动态的共同原因。