Calcareous nannoplankton in continental-shelf sediments, East China Sea
Calcareous nannoplankton in continental-shelf sediments, East China Sea
复制标题
DOI：
10.2307/1485621
复制
发表时间：
1986-07
影响因子：
1.5
通讯作者：
Jijun Zhang;W. G. Siesser
中科院分区：
文献类型：
--
作者：
Jijun Zhang;W. G. Siesser
对采自东海陆架的22个样品进行了钙质微型浮游生物的调查，共鉴定出36个原生类群。微型浮游生物的丰度和多样性在向海方向上逐渐增加，反映了水温、盐度和陆源沉积物输入到大陆架的变化。控制现代微型浮游生物群落分布的主要环境因子是在南部中、外陆架向南流动的冷的近岸沿岸流和向东北流动的暖的黑潮。根据微型浮游生物的组合特征，将陆架划分为3个区：1）陆架内区（Gephyrocapsa oceanica区），微型浮游生物丰度和多样性较低，以G.海洋; 2）靠近中陆架的一个带（Gephyrocapsa oceanica-Emiliania huxleyi带），其丰度和多样性均处于中等水平，G. oceanica和E. huxleyi和G.（3）外陆架区（Emilianiahuxleyi-Gephyrocapsa oceanica带），具有丰富多样的E. huxleyi占优势，G.海洋。
Calcareous nannoplankton have been investigated in 22 samples collected from the East China Sea continental shelf and 36 indigenous taxa identified. Nannoplankton abundance and diversity increase progressively in a seaward direction, reflecting changes in water temperature, salinity and terrigenous sediment input to the shelf. The chief environmental factors controlling the distribution of modem nannoplankton assemblages are the cold inshore Coastal Current flowing southward and the warm Kuroshio Current flowing northeastward over the southern middle and outer shelf. The continental shelf can be divided into three zones based on the nannoplankton assemblage: 1) an inner-shelf zone (Gephyrocapsa oceanica Zone) which is low in nannoplankton abundance and diversity and in which the species present are overwhelmingly dominated by G. oceanica; 2) a zone approximating the middle shelf (Gephyrocapsa oceanica-Emiliania huxleyi Zone) in which abundance and diversity are moderate-with G. oceanica and E. huxleyi the dominant species and G. oceanica predominating; and 3) an outer-shelf zone (Emiliania huxleyi-Gephyrocapsa oceanica Zone) of much abundance and diversity, with E. huxleyi predominant over G. oceanica.