摘要
定量分析了南海３３个１０００ｍ水深线以内的现代表层沉积样品中的硅藻，发现主要的种有菱形海线藻Ｔｈａｌａｓｓｉｏｎｅｍａｎｉｔｚｓｃｈｉｏｉｄｅｓ、短刺角毛藻Ｃｈａｅｔｏｃｅｒｏｓｍｅｓｓａｎｅｎｓｉｓ、结节圆筛藻Ｃｏｓｃｉｎｏｄｉｓｃｕｓｎｏｄｕｌｉｆｅｒ、长海毛藻Ｔｈａｌａｓｓｉｏｔｈｒｉｘｌｏｎｇｉｓｓｉｍａ、海洋菱形藻Ｎｉｔｚｓｃｈｉａｍａｒｉｎａ和条纹小环藻Ｃｙｃｌｏｔｅｌｌａｓｔｒｉａｔａ。根据硅藻主要种的百分含量、各站位硅藻丰度的变化以及其它一些特征，将３３个样品划分为５个硅藻组合，并着重研究这些组合与环境因素之间的关系。
it is found that Thalassionema nitzschioides, Chaetoceros messanensis,Coscinodiscus nodulifer, Thalassiothrix longissima, Nitzschia marina and Cyclotellastriata are important diatom species by quantitative analysis on 33 surface sedimentsamples within 1 000m isobath of the South China Sea. According to the percentagesof important species, diatom individual numbers and other characteristics, 33 samplesare divided into 5 assemblages and their relations with environmental factors arediscussed emphatically,
出处
《热带海洋》
CSCD
1999年第1期16-22,共7页
基金
中国科学院资源与生态环境研究重大项目!KZ951-A1-402-5
中国科学院南海海洋研究所所长基金!Q-950602
关键词
南海
表层沉积
硅藻
环境
古环境
South China Sea, surface sediments, diatom, environment
