Biodiversity of Early-Middle Ordovician acritarchs and sealevel changes in South China

作     者：YAN Kui1,3, LI Jun1 & LIU Jianbo2 1. Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008, China 2. School of Earth and Space Sciences, Peking University, Beijing 100871, China 3. Gradate University of Chinese Academy of Sciences, Beijing 100049, China 

出 版 物：《Science Bulletin》 (科学通报(英文版))

年 卷 期：2005年第20期

页      面：108-114页

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

主　　题：acritarchs diversity sea level changes Early-Middle Ordovician South China. 

摘      要：As the primary producers, acritarchs represent the base of the food chain in the Paleozoic marine ecosystem which links with the evolution of acritarchs. Based on high precision quantitative research, much information about Paleozoic marine ecosystem is provided. A quantitative analysis of Early-Middle Ordovician acritarch diversity changes in the Meitan Formation, Honghuayuan section, Tongzi, Guizhou is made and the the acritarch diversity curves are compared with sea level curves. We found that acritarch diversity changes were related to sea level changes during the Early-Middle Ordovician. Whereas sea level rose, and acritarch diversity also increased. An inshore-offshore model of acritarchs best explains the relative abundance changes of some acritarch taxa in relation to sea level changes.