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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 surface sediment diatoms in the Yellow Sea can be divided into three zones: (1) coastal-intertidal zones with water depths of 20-30 m and salinities of 30.0 ‰, mainly distributed in the intertidal zone of Cyclotella cylindrica ; (2) the transition zone, including the northern part of the Yellow Sea and the southwestern part of the depth of 30-50m, the salinity of 31.0-32.5 ‰, the area can be further divided into Platails algae, (3) shallow sea areas, including the central and northern part of the Yellow Sea and southeastern parts of the Yellow Sea, with a depth of more than 50 m and a salinity greater than 32.0 ‰. The combination of round-screen algae is dominant. In some sea areas, anomalous diatoms are also found. Light, salinity and temperature are the most important factors affecting the distribution of diatoms, whereas the occurrence of anomalous diatoms may be related to paleogeographic conditions.