Abstract：Foraminiferal and ostracod assemblages in 100 surface sediment samples collected from the Huangmao Bay of the Pearl River Estuary were analyzed，leading to the identification of a total of 36 foraminiferal species belonging to 21 genera and 20 ostracod species belonging to 16 genera.The dominant species of the two faunas with a relative abundance higher than 10％ are Ammonia beccarii-Quinqueloculina akneriana rotunda-Cavarotalia annectens-Elphidium advenum and Neomonoceratina delicata-Sinocytheridea impressa-Bicornucythere bisanensis, respectively.The abundance and diversity of foraminifers and ostracods increase gradually seawards across the estuary.The Detrended Correspondence Analysis of foraminiferal and ostracod species suggested that the most important factor affecting the distribution of foraminifers and ostracods in the surface sediments of the Huangmao Bay is water salinity，followed by hydrodynamics.Besides，water depth has also a certain effect on the faunal distribution but not the main controlling factor.As a result of freshwater influencing，the environment of northern estuary is of low salinity and high water energy，which is not conducive to survival of foraminifers and ostracods，leading to a low abundance and diversity of the two faunas.On the other hand，because of the salinity increasing and the islands acting as the barrier to turbulent sedimentary environment，the abundance and diversity of foraminifers and ostracods increase rapidly in the southern estuary.
Wu Jie,Liu Chunlian,Jia Liangwen et al. Foraminiferal and ostracod distribution in surface sediments from Huangmao Bay of Pearl River Estuary and its influencing factors[J]. JOPC, 2013, 15(3): 413-422.
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