【摘要】 通过对元古宙至寒武纪早期疑源类的分析研究表明 :新元古代早期和晚期疑源类的辐射分别与全球范围内超级大陆 (rodinia)形成及海洋中锶同位素 87Sr/86Sr值显著上升 ,陆源物质增加 ,δ13 C值由负值转为正值的时期相吻合 ;早寒武世疑源类的辐射与超级大陆 (pannotia)的形成、裂解对全球环境的影响有关。认为疑源类在早寒武世的适应辐射 ,改变了全球生物的营养结构 ,“中型浮游动物”对小个体棘刺疑源类的有效利用 ,可能是引发“寒武爆发”的原因之一更多还原

【Abstract】 Analysis and study of the evolution of acritarch from Proterozoic to Cambrian shows the radiation of acritarch during the Early Neoproterozoic and Late Neoproterozoic periods went with the formation of Rodinia supercontinent, the apparent rise of the value of 87 Sr/ 86 Sr and the change in value δ 13 C from negative to positive.The radiation of acritarch in the Early Cambrian is related to the effects of the formation and Breaking up of Pannotia supercontinent on the global climate and the oceanic chemistry. The radiation of acritarch changed the nutrient structure in the ocean and the Mesozooplankton′s utilization rate of the nutrition, which may be one of the triggering causes for the "Cambrian explosion".更多还原