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通过 92个样品分析 ,发现南海北部陆坡末次冰期以来沉积物中有机壁浮游藻类输入通量在新仙女木期和早全新世明显高于其它时期 ,新仙女木期的输入通量峰值及不同于 Spiniferites spp.组合 (较暖期 )和Protoperidinioid类孢囊组合 (较冷期 )的 Operculodinium cetrocarpum组合 ,表明当时表层海水环境较为特殊 ,可能是水温偏低且较富营养的条件 ,早全新世的有机壁浮游藻类高输入通量期持续约达 40 0 0 a,Spiniferites spp.为优势的孢囊组合和较高的淡水绿藻输入通量反映了早全新世夏季风强盛及表层海水较暖 ,Spiniferites spp.含量低值段对应于末次盛冰期和新仙女木期 ,而高值段对应于夏季风强盛的早全新世 ,Protoperidinioid类孢囊显示了与Spiniferites spp.相反的变化趋势 ,其含量在末次盛冰期最高 ,新仙女木期又现高值 ,而 8～ 5 ka B.P.的全新世暖期降至最低。L ingoludinium machaerophorm和 Polysphaeridium zoharyi的含量变化记录了末次冰期以来南海北部海水盐度由低到高的变化趋势 ,末次冰期海水盐度低 ,冰消期开始升高 ,全新世海水盐度较高
Based on the analysis of 92 samples, it was found that the input flux of organic wall phytoplankton in the sediments of the northern South China Sea was significantly higher than that of the other periods in the Sinian and Early Holocene, The combination of Spiniferites spp. (Warmer) and Protoperidinioid cysts (colder) Operculodinium cetrocarpum indicated that the surface seawater environment was rather special at that time, probably due to the low water temperature and the more nutritious conditions. In the early Holocene organic The high input flux of wall-planktonic algae lasted for about 400 years. The input flux of Spiniferites spp., The dominant cyst assemblage and the higher freshwater green algae reflected the strong Pre-monsoon summer monsoon and the warmer surface water. Spiniferites spp. The low-value segment corresponds to the last glaciation and the new fairy woody period, while the high-value segment corresponds to the early summer monsoon-rich Early Holocene. Protoperidinioid cysts showed the opposite trend compared with Spiniferites spp. The highest ice age, the new fairy woody and high values, and 8 ~ 5 ka BP Holocene to a minimum. The changes of L ingoludinium machaerophorm and Polysphaeridium zoharyi recorded the descending trend of sea salinity in the northern South China Sea since the last ice age. The salinity of seawater in the last ice age was low, the ice age started to increase,