PHYTOPLANKTON COMMUNITY OF THE JIAOZHOU BAY IN SPRING 2009

We studied the phytoplankton community in spring 2009 in the Jiaozhou Bay based on phytoplankton data from 23 grid stations. Three classes including 47 genera and 74 species were determined. The average cell abundance was 827.77cell/m L. The diatoms abundance and the distribution controlled the total variation of phytoplankton abundance. The dominant species were Leptocylindrus danicus and Skeletonema costatum. The horizontal distribution of phytoplankton cell abundance was higher in the northern part of the bay, and lower in the southern part. The vertical distribution of phytoplankton cell abundance had no significant difference between the surface and the bottom. The horizontal distribution of phytoplankton Shannon-Wiener index and Pielou index demonstrated that the phytoplanktonic community structure was relatively evener and more stable in the northeastern part of the bay than those of the southwestern. The phytoplankton cell abundance correlated positively to the temperature.