Large-scale ecological study on planktonic ostracoda in China’s seas and adjacent watersⅠ.Abundance of planktonic ostracoda and its law of variation

By taking China's seas as a unit for study,this paper analyzes in general the law of abundance variation of planktonic ostracoda and illustrates the difference of individual density in different seasons and areas.In addition, based on the features of horizontal distribution of planktonic ostracoda,this paper points out that except the waters off Shantou in the Eastern Guangdong,all the other coastal areas are very low in abundance,that the waters deeper than the 200 m isobar have a homogenous distribution of low abundance and that the waters between the isobars of 50 m and 200 m have distinctly increased abundance, though in China's seas,there exist all the year round three zones with concentrated abundance of planktonic ostracoda.