The effects of two nutrient sources on the plankton community structure and C/N trophic shift in Ctenopharyngodon idella poly-culture ponds

• WANG Longsheng, 
• ZHOU Qiong, 
• XIE Congxin, 
• SHEN Minghua, 
• ZHOU Gengen, 
• HE Xugang, 
• LI Dapeng