【摘要】 对杭州湾海域239个表层沉积物样品进行了有孔虫鉴定分析,共鉴定出底栖有孔虫71种,浮游有孔虫6种。研究结果表明杭州湾表层沉积物中有孔虫丰度值偏低,最高丰度仅41枚/克干样,且以底栖有孔虫占绝对优势,浮游有孔虫很少;杭州湾表层沉积物中的有孔虫以异地搬运沉积为主,主要以广盐广适的属种和小个体的海相属种为优势种,如Ammonia beccarii,Ammonia annectens,Quinqueloculia lamarckiana,Elphidium advenum,Spiroloculina communis,Pararotalia nipponica,Poroeponides lateralis等;并根据属种分布特征划分了两个底栖有孔虫组合分区。更多还原

【Abstract】 A total of 239 surface sediment samples from the Hangzhou Bay were quantitatively analyzed for foraminifera.71 benthic foraminifera species and 6planktonic foraminifera species have been found in these samples.The results show that foraminifera abundance in the surface sediments of Hangzhou Bay is low and the maximum only 41/g dry sample.Benthic foraminifera dominate the sample and planktonic foraminifera are rare.The foraminifera,dominated by euryhalinous and eurytopic species,are mainly re-transported allochthonous small species,such as Ammonia beccarii,Ammonia annectens,Quinqueloculia lamarckiana,Elphidium advenum,Spiroloculina communis,Pararotalia nipponica,Poroeponides lateralis.According to the distribution pattern of dominant benthic foraminifera,two assemblages recognized.更多还原