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

作　　者：YAN Kui LI Jun LIU Jianbo 

机构地区：[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　　处：《Chinese Science Bulletin》2005年第20期2362-2368,共7页

基　　金：supported by the National Natural Science Foundation of China(Grant No.40372009);Chinese Academy of Sciences(Grant Nos.KZCX2-SW-130,KZCX3-SW-149);the Ministry of Science and Technology of China(Grant Nos.G200077700,2003CB7 16805).

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.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.

关 键 词：中国 海平面 奥陶纪 古生地层 环境参数 

分 类 号：P736[天文地球—海洋地质]