The preliminary studies on water environment, primary productivity and carbon sinking fisheries development in Dongjiang Reservoir
东江水库碳汇渔业与生态保护的初步研究

Estimating the catches of natural fisheries resources and the amount of possible remove carbon sinking after investigation on ambient of Dongjiang Reservoir and monitoring & evaluating the primary productivity and water quality. Results show that abundant exogenous nutrient substances exist around the reservoir mainly from agriculture, domestic wastewater and tourism; the water quality in Oct. was better than its in Jul., and also belong to middle nutritional level; the mean primary productivity was 5.16 gO2/m2 d and equal to the filter-feeding fish catches 1164.30T/y that probably could remove total carbon 41.35T/y.The primary productivity was in strong positive correlation with Chlorophyll-a, ammonia nitrogen and total phosphorus concentration. Fish was released from 2007 to 2010, and the annual highest yield of filter-feeding fish was 900T which equal to 32T carbon. N, P could be taken advantages of and reaching the purpose of sustainable development of carbon sinking fisheries through estimating the primary productivity and using the sinking carbon technology such as releasing filter-feeding fish for multiplication under making the regulation of protecting fisheries environment in Dongjiang Reservoir.