The global reorganizations of marine ecosystems in the terminal Ediacaran and Terreneuvian include two breakthroughs (Cambrian Information Revolution and Agronomic Revolution) followed by the Cambrian Substrate Revolution in the Cambrian Series 2–Furongian. The first two attribute to colonization of new ecological niches by burrowing bilaterians and their gradual expansion within the marine realm. The ichnological record of siliciclastic sequences shows that these processes were most intense in the offshore zone, as compared to more proximal and distal shelf successions. For carbonate basins, the spatial and temporal dynamics of these two revolutions are still poorly understood. The Siberian Platform around the Precambrian–Cambrian transition shows a wide distribution of the marine carbonate facies and hence has high potential for studying the associated endobenthic ecosystem transformations. This study summarizes the results of paleoichnological studies in the terminal Ediacaran and Terreneuvian strata (∼550–521 Ma) in nine regions of the Siberian Platform periphery. The ichnoassemblages are grouped in three stratigraphic intervals (terminal Ediacaran, Fortunian Stage, Cambrian Stage 2) and attributed to sedimentary environments within the models of siliciclastic shelf and/or carbonate ramp. The evolution of the ichnoassemblage structure is evaluated applying the ecosystem engineering and ecospace occupation analyses. The study reveals that the terminal Ediacaran fossil record of the Siberian Platform lacks undisputed trace fossils. In the Terreneuvian, the general patterns of spatiotemporal development of endobenthic communities in the carbonate-associated marine environments generally coincided with those in the siliciclastic basins. The study shows that the greatest innovations in the organism-sediment interactions attributed to the first two Cambrian revolutions happened near the beginning of the Fortunian Stage and Cambrian Stage 2, respectively. However, some important interactions typical for the Agronomic Revolution (e.g., deep infaunal tiering, spreiten burrows) first appeared during the Fortunian.

中文翻译：

---

西伯利亚的埃迪卡拉纪-特雷诺夫革命末期


埃迪卡拉纪和特雷诺夫纪末期海洋生态系统的全球重组包括两项突破（寒武纪信息革命和农艺革命），随后是寒武纪系列 2-阉融纪的寒武纪基质革命。前两个归因于穴居双侧动物对新生态位的殖民化以及它们在海洋领域的逐渐扩张。硅碎屑序列的动物学记录表明，与更近端和远端的大陆架演替相比，这些过程在近海区最为强烈。对于碳酸盐盆地，人们对这两次革命的时空动态仍然知之甚少。前寒武纪-寒武纪过渡期周围的西伯利亚平台显示出海洋碳酸盐岩相的广泛分布，因此具有研究相关底栖生态系统转变的巨大潜力。本研究总结了西伯利亚平台外围九个地区的末期埃迪卡拉纪和特雷诺夫纪地层（∼550-521 马）的古动物学研究结果。鱼群组合分为三个地层区段（埃迪卡拉纪末期、福图尼亚期、寒武纪第 2 期），并归因于硅碎屑架和/或碳酸盐斜坡模型中的沉积环境。应用生态系统工程和生态空间占用分析评估了 ichnoassemblage 结构的演变。研究表明，西伯利亚平台的末端埃迪卡拉纪化石记录缺乏无可争议的痕迹化石。在陆生纪，碳酸盐相关海洋环境中底栖生物群落时空发展的一般模式与硅质碎屑盆地中的时空发展模式基本一致。 研究表明，归因于前两次寒武纪革命的生物体-沉积物相互作用的最大创新分别发生在 Fortunian 阶段和 Cambrian 阶段 2 的开始附近。然而，农艺革命的一些典型重要相互作用（例如，深部动物区系分层、spreiten 洞穴）首次出现在 Fortunian 期间。