Abstract
Abstract During the period between December 1997 and November 1998, four cruises were conducted in the East China Sea with the purpose of investigating the growth and grazing mortality rates of an autotrophic picoplankton, Synechococcus spp. In the euphotic zone, the mean growth rate of individual cruises varied from 0.20 day−1 in March to 0.68 day−1 in June. By comparison, the mean grazing rate varied from 0.07 day−1 in March to 0.40 day−1 in June. Both the mean growth and the mean grazing rates apparently varied with seasonal changes in water temperature. With respect to spatial variations, the pattern during the cold period of the year (cruises in December and March) was characterized by low growth rate in the coastal zone (
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