Based on the analysis of data on bryozoan localities in territory of modern Eurasia, changes of the bryozoan richness were calculated in detail for six time slices in the interval from the early Famennian to the late Tournaisian. Highest extinction tempo was observed for the latest Famennian, apparently linked to the Hangenberg Event. However, in the richness of bryozoans during the late-latest Famennian, an abrupt increase in the origination tempo is observed, as well as a slight decrease in the total bryozoan richness at the Devonian-Carboniferous transition. Origination of abundant narrowly specialised bryozoan genera in the orders Trepostomata and Cryptostomata at the end of the Devonian and in the beginning of the Carboniferous was caused by the combined influence of extrinsic and intrinsic factors. An observed increase in the morphological specialisation of bryozoans during the Late Devonian and early Carboniferous coincides with patterns observed in other benthic organisms such as brachiopods and rugose corals. These patterns can be explained by vacation of ecological niches and changes in the structure of the marine biota in the aftermath of the Hangenberg Event.

根据对现代欧亚大陆境内的苔藓虫分布的数据分析，详细计算了法门尼安早期至图尔奈斯晚期的六个时间段的苔藓虫的丰富度变化。观察到最新的法门尼人灭绝的速度最高，这显然与杭伯格事件有关。但是，在后期法门尼时期的苔藓虫的丰富度中，观察到始发速度突然增加，在泥盆纪-石炭纪过渡时期，苔藓虫的总丰富度略有下降。泥盆纪末期和石炭纪开始时，在特雷波斯塔玛塔（Trepostomata）和隐孢子虫（Cryptostomata）阶中，大量狭义的苔藓虫属的起源是由外在因素和内在因素共同作用引起的。在泥盆纪晚期和石炭纪早期，观察到的苔藓虫的形态专长增加与在其他底栖生物（如腕足动物和皱纹珊瑚）中观察到的模式相吻合。杭伯格事件之后，生态位的休假和海洋生物群结构的变化可以解释这些模式。