摘要
黄海表层沉积硅藻可划分为三个区:(1)滨岸-潮间带区,水深为20—30m,盐度为30.0‰,主要分布着以柱状小环藻为主的潮间带种类;(2)过渡区,包括黄海北部的大部和西南部,水深在30—50m之间,盐度为31.0—32.5‰,本区还可进一步划分为明盘藻、直链藻和辐裥藻三个亚区;(3)浅海区,包括黄海中北部和东南部,深度大于50m,盐度大于32.0‰,分布着以圆筛藻为主的组合,个别海区还见反常硅藻组合。光照、盐度和温度是影响硅藻分布最重要的因素,而反常硅藻组合的出现则可能与古地理条件有关。
The distribution of diatom in the surface sediments of the Huanghai Sea(Yellow Sea)may be divided into 3 characteristic regions:1.the coastal and intertidal region with a depth of 20-30 m or less,salinity of 30.0‰,never more than 31.0‰,and with the distribution of intertidal species such as Cyclotella stylorum Brightwell and Trice-ratium favus Ehrenbergii;2.the transition region,including most of the northern Huanghai Sea and the west of the southern Huanghai Sea,depth’between 30-50 meter,salinity 31.0-32.5‰,and subdivided into Hyalodiscus,Melosira and Actinoptychus three subregions;3.the neritic region,including the south of northern Huanghai Sea and the east and middle of southern Huanghai Sea,depth more than 50 m,salinity higher than 32.0‰,with a distribution of Coscinodisciis assemblage and extraordinary diatom assemblage occasionally.Light,salinity and temperature are the most important factors influencing the distribution of diatom.Occurrence of the extraordinary diatom assemblage may be related with the paleogeomorphology.All of these may be helpful to the explanation of paleoenvironment with the fossil diatom.
作者
王开发
蒋辉
张玉兰
王永吉
徐家声
Wang Kaifa;Jiang Hui;Zhang Yulan;Wang Yongji;Xu Jiasheng(Tongji University,Shanghai;The First Institute of Oceanography,NOB,Qingdao)
出处
《海洋与湖沼》
1985年第5期400-407,431-432,共10页
Oceanologia Et Limnologia Sinica
