Abstract: The species composition and biomass of phytoplankton and the amount and dynamics of bacterioplankton and picophytoplankton were studied in freshwater ponds stocked with silver carp （Hypophthalmichthys molitrox） and bighead carp （Aristichthys nobilis） in Biliu River Fisheries Company in Liaoning Province from April in 2002 to March in 2003. The contribution of picophytoplankton to primary production of phytoplankton was estimated by white and black bottle. Totally, 88 phytoplankton species in 64 genera were found, Chlorophyta and Cyanophyta being dominant, whose biomass varied from 0.36 mg/L to 266.21 mg/L and averaged （86.39 ±26.12） mg/L. The amount of bacterioplankton ranged between 1.01 ×10^10个/mL and 8.50 ×10^10个/mL with a maximum in August and September, and it fell down in autumn. No obvious seasonal dynamics was observed in the amount of picophytoplankton varying from 0.34 ×10^3个/mL to 5.71 ×10^3个/mL. The ratio of productivity of picophytoplankton to the primary productivity of phytoplankton was from 23% to 93%. The amount of baterioplankton and picophytoplankton was closely related to water temperature and nitrogen level, respectively.
郭赣林, 赵文, 曹欢, 张树伟. 淡水鱼池浮游植物和浮游细菌数量动态及超微藻类对初级生产力的贡献[J]. 大连海洋大学学报, 2006, 21(4): 350-356.
GUO Gan-lin, ZHAO Wen, CAO Huan, ZHANG Shu-wei . The dynamics of bacterioplankton and contribution of picophytoplankton to primary production of phytoplankton in freshwater ponds. Journal of Dalian Ocean University, 2006, 21(4): 350-356.
2006, Vol. 21 
