The seston structure and storage of organic carbon pools in freshwater fish ponds
GUO Gan-lin, ZHAO Wen
School of Life Science and Technology, Dalian Fisheries Univ. , Dalian 116023; Key Laboratory of Hydrobiology in Liaoning Province＇s University, Dalian Fisheries Univ. , Dalian 116023, China
Abstract: The seston structure and storage of organic carbon pools in freshwater fish ponds were examined from June in 2002 to March in 2003. The results showed that the concentration of total suspended particular matter varied from 18.1±62.92 mg/L, with average value of （37.53 ± 22.02）mg/L. The average ash content was 33%. The proportion of dry weight of plankton （PZ） in total suspended particulate （TS） ranged from 16.81% to 30.65%, with an average of 25.05%. The dry weight of phytoplankton （DWP） was 4.62 - 12.33 rag/L, with the average value of 8.15 mg/L. The dry weight of zooplankton （DWZ） ranged from 0.08 to 0.81 mg/L, with the average value of 0.50 mg/L. The mean storage of dissolved organic carbon （DOC） and particulate organic carbon （POC） were （ 11.32 ± 3.66 ） mg/L and （ 8.75 ± 4.28 ） mg/L, respectively. The ratio of total organic carbon （TOC）, DOC to POC was 1： 0.56： 0.44. Among particulate organic carbon （POC） the ratio of bacteria and detritus particular carbon （BDC）, plankton carbon （PC） to zooplankton carbon （ZC） was 26.45： 16.30： 1. The proportion of plankton carbon in PC was 94.22%, with PC dormant effect.
2006, Vol. 21 
