Ichnologic evidence of ecospace utilization in mid to late Paleozoic marine environments

中晚古生代海洋环境生态空间利用的技术证据

• 批准号: RGPIN-2020-03974
• 负责人: Buatois, Luis
• 金额: $ 4.44万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754963
• 关键词: Ichnologic; evidence; ecospace; utilization; mid

Ichnology comprises the study of biogenic structures that result from the interactions between organisms and the substrate. Because trace fossils are commonly produced by soft-bodied animals, they are not subjected to the same preservational constrains than body fossils. The study of trace fossils has much to contribute to our understanding of the changing ecology of the past by providing a perspective of animal-substrate interactions in deep time. Also, because trace fossils typically display a close link with environmental factors and facies analysis has become an increasingly refined technique, it is possible to provide a more detailed characterization of facies constraints for trace fossils than for body fossils. Although the majority of ichnologic studies dealing with macroevolutionary implications has focused on degree of bioturbation, a more sophisticated and rich set of conceptual and methodological tools is currently available, including ichnodiversity, ichnodisparity and analysis of benthic ecospace occupation and ecosystem engineering. This proposal aims to further explore patterns of ecospace utilization during the mid to late Paleozoic. Therefore, the objectives of this project are to: (1) document Silurian to Permian marine ichnofaunas in their environmental context, (2) assess ichnodiversity and ichnodisparity trajectories during the Silurian to Permian, and (3) analyze ecospace utilization and ecosystem engineering along the marine depositional profile during the middle to late Paleozoic. This project implies compilation of a database for the Silurian-Permian, revision of trace-fossil collections, and fieldwork in various key Silurian-Permian localities. By expanding research to the rest of the Paleozoic, this project represents a continuation of a broader research program undertaken by the applicant. The significance of this project is demonstrated by the fact that the suggested approach has already generated the publication of high-impact papers for the Ediacaran-Ordovician timespan.

技术包括对生物体与基质之间相互作用产生的生物结构的研究。由于遗迹化石通常由软体动物产生，因此它们不会受到与身体化石相同的保存限制。痕迹化石的研究通过提供动物与基质在深层相互作用的视角，对我们了解过去不断变化的生态做出了很大贡献。此外，由于痕迹化石通常表现出与环境因素的密切联系，并且相分析已成为一种日益完善的技术，因此可以为痕迹化石提供比尸体化石更详细的相约束特征。尽管大多数涉及宏观进化影响的地貌学研究都集中在生物扰动的程度上，但目前有一套更复杂和丰富的概念和方法工具，包括地貌多样性、地貌差异以及底栖生态空间占用和生态系统工程的分析。本提案旨在进一步探讨古生代中晚期生态空间利用模式。因此，该项目的目标是：（1）记录志留纪至二叠纪海洋动物群的环境背景，（2）评估志留纪至二叠纪期间的物种多样性和物种差异轨迹，以及（3）分析沿线的生态空间利用和生态系统工程。中、晚古生代海相沉积剖面。该项目意味着编制志留纪-二叠纪数据库、修订痕迹化石收藏以及在志留纪-二叠纪各个关键地点进行实地考察。通过将研究扩展到古生代的其他地区，该项目代表了申请人所开展的更广泛研究计划的延续。该项目的重要性体现在以下事实：所建议的方法已经发表了埃迪卡拉纪-奥陶纪时期的高影响力论文。