首页 | 本学科首页   官方微博 | 高级检索  
     检索      

南海表层沉积物中放射虫的组合特征与海洋环境
引用本文:陈木宏,张兰兰,张丽丽,向荣,陆钧.南海表层沉积物中放射虫的组合特征与海洋环境[J].地球科学,2008,33(6):775-782.
作者姓名:陈木宏  张兰兰  张丽丽  向荣  陆钧
作者单位:中国科学院边缘海地质重点实验室南海海洋研究所
基金项目:国家自然科学基金课题,国家"973"项目课题,国家科技支撑计划课题
摘    要:南海拥有较齐全的边缘海地理地貌与生态环境,沉积物中保存的放射虫种类繁多,个体丰富.本文采用数理统计与聚类分析方法,对表层沉积物中放射虫的组合特征进行了较为详细的定量分析,以期获得可靠的放射虫组合与分布的特征.聚类分析结果显示,放射虫组合在南海表层沉积物中的分布大致可区分为5种类型:陆架浅水区型、陆坡珊瑚礁区型、中央海盆区型、南部富营养区型和夏季上升流区型,它们分别对应于特有的海洋环境,并由含有某些优势种类的放射虫群落所组成.进一步分析还表明,南海的北部、中部和南部分别表现为3个不同生态环境的海区:北部海区受陆源影响较为明显;中部海区被中央水团、海底火山活动和夏季上升流活动所控制;南部海区总体上属于典型的珊瑚礁海洋环境,生态与沉积环境明显优越于北部海区.南海表层沉积物中放射虫的组合分布特征较好地响应和反映了所在海区的生态环境与沉积条件,是探讨古海洋环境的重要依据.

关 键 词:放射虫  组合特征  海洋环境  表层沉积物  南海

Radiolarian Assemblages in Surface Sediments of the South China Sea and Their Marine Environmental Correlations
CHEN Mu-hong,ZHANG Lan-lan,ZHANG Li-li,XIANG Rong,LU Jun CAS Key Laboratory of Marginal Sea Geology,South China Sea Institute of Oceanology,Guangzhou ,China.Radiolarian Assemblages in Surface Sediments of the South China Sea and Their Marine Environmental Correlations[J].Earth Science-Journal of China University of Geosciences,2008,33(6):775-782.
Authors:CHEN Mu-hong  ZHANG Lan-lan  ZHANG Li-li  XIANG Rong  LU Jun CAS Key Laboratory of Marginal Sea Geology  South China Sea Institute of Oceanology  Guangzhou  China
Institution:CHEN Mu-hong,ZHANG Lan-lan,ZHANG Li-li,XIANG Rong,LU Jun CAS Key Laboratory of Marginal Sea Geology,South China Sea Institute of Oceanology,Guangzhou 510301,China
Abstract:The South China Sea(SCS) features relatively complete physiographical units and ecologic environments of marginal sea,where there are a lot of radiolarian species and specimens preserved in the sediments.Methods of quantitative statistics and clustering were used in this paper to analyze the radiolarian assemblages in surface sediments of the SCS so as to obtain their characteristics of compositions and distributions.Result of clustering analysis shows that the radiolarian assemblage in the surface sediments may be mainly divided into five groups,namely,assemblages of shallow shelf,coral slope,central basin,southern rich nutrition and summer upwelling,corresponding to different special marine environments respectively and consisting of certain radiolarian communities of dominant species.It is also indicated that the northern,central and southern SCS take on as three different ecologic costal areas respectively,such as the north affected mostly by terrigenous input,the central area controlled mainly by the central basin waters,submarine volcanic and summer upwelling activities,and the south generally belonging to a typical coral environment where there is a better ecologic and sedimental environment for radiolarian than in the northern SCS.The radiolarian assemblages and distributions in the SCS surface sediments are well responding to and reveal the marine ecologic conditions and sedimental environments,which may be important evidences for paleoceanographic exploration.
Keywords:Radiolarian  assemblage character  marine environment  surface sediment  South China Sea
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号