Vertical characteristics and diel variations of femtoplankton and picoplankton at the Changjiang Estuary
长江口极微型和微微型浮游生物的垂向变化与周日波动

The cruise was conducted from June 12 to 22,2006,on board R/V Dong Fang Hong 2 at the Changjiang Estuary.Water samples were collected at three anchor stations.Femtoplankton and picoplankton were simultaneously determined by flow cytometery.Prochlorococcus was undetectable in all samples.Aver-age abundances of Synechococcus and picoeukaryotes were at the order of 105 ~ 106 cells/L,but heterotrophic bacteria and viruses at the order of 108 ~ 109 cells/L.In the turbid Changjiang Estuary,vertical characteristic...