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奥陶纪生物大辐射是早古生代地球海洋生态系统发生的一次重大生物事件,经过数10年的地层古生物研究积累和近20年来全世界多个国家与地区相关专家有针对性的研究(以3个IGCP项目的连续执行为标志),目前已经有了一些基本共识:大辐射持续了几乎整个奥陶纪,达4000多万年,期间出现过多次辐射高潮;差异演化是大辐射的基本特征之一;大辐射的发生并不伴有地球海洋生态环境的重大灾变,其起始、进程以及具体表现型式受生物自身宏演化规律(内因)和外界环境因素(外因)的双重制约.在华南开展的实例研究为国际间深刻认识这一重大生物事件做出了积极贡献.继续深化奥陶纪生物大辐射的研究,一方面要在有条件的地区广泛开展实例分析,在精深系统古生物学和高精度生物地层学研究的基础上,深刻揭示大辐射的过程和实质;另一方面要积极与沉积学、构造地质学、地球化学等相关学科进行交叉与综合,以探讨大辐射的诱因及控制机制,进而揭示大辐射期间有机界与无机界的协同演变关系.
Ordovician biological radiation is a major biological event occurring in the early Paleozoic marine marine ecosystem. After several decades of accumulation of paleontological research and targeted researches by experts from many countries and regions in the world over the past 20 years There are already some basic consensus that there has been some basic consensus: the large radiation lasted almost the entire Ordovician for more than 40 million years and there were many orgasms during the period; the differential evolution was the basic characteristic of large radiation The occurrence of large radiation is not associated with the catastrophic catastrophe of the Earth’s marine environment, and its initiation, process and specific manifestations are subject to the dual constraints of biological macro-evolution (intrinsic factor) and external environmental factors (external factors) The case study carried out has made a positive contribution to a profound understanding of this major biological event in the world. Continuing to deepen the research on the radiation of Ordovician organisms, on the one hand, extensive case studies should be conducted in qualified areas. In the deep system of paleontology and Based on the study of high-precision bio-stratigraphy, the process and essence of large radiation are deeply revealed. On the other hand, active and sedimentary science, tectonic geology Geochemical and other related disciplines intersect with comprehensive, incentive and control mechanisms in order to explore a large radiation, thus revealing a synergistic organic and inorganic world community during large radiation evolving relationship.