Abstract: The changes in plankton species community, cells abundance, dominate species and seasonal variation in brood sturgeon culture ponds were studied from May to September in 2009. The results showed that the sediment resuspension caused by brood sturgeon＇s daily movements induced Secchi depth transparency stable at low levels. The Chlorophyta Selenastrum spp. and Chlorella spp. were found to be dominant in phytoplankton community. The abundance of phytoplankton were found to range from 1.0883 × 10^7ind./L to 1.5662x 10^7ind./L, and biomass range from 14.6438 mg/L to 19.2535 mg/L. The Rotifera and Copepoda were dominant in zooplankton community. The abundance of zooplankton was ranged from 162.0000ind./L to 560.0000 ind./L ,and biomass from 0.3795 mg/L to 1.5482 mg/L. The changes in plankton community structure were attributed to the daily movements of the brood sturgeon.

Key words: brood sturgeon, pond culture, plankton, community structure, sediment resuspension