AEI 8:221-232 (2016)  -  DOI: https://doi.org/10.3354/aei00144

Impacts of an integrated multi-trophic aquaculture system on benthic nutrient fluxes: a case study in Sanggou Bay, China

Zhiming Ning1, Sumei Liu1,2,*, Guoling Zhang1, Xiaoyan Ning1, Ruihuan Li1,5, Zengjie Jiang3, Jianguang Fang3, Jing Zhang4

1Key Laboratory of Marine Chemistry Theory and Technology MOE, Ocean University of China/ Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, PR China
2Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, PR China
3Key Laboratory of Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, PR China
4State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, PR China
5Present address: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
*Corresponding author:

ABSTRACT: Benthic nutrient fluxes in an integrated multi-trophic aquaculture (IMTA) bay—Sanggou Bay, China—were measured in June and September 2012. The benthic nutrient fluxes and total organic carbon (TOC) of sediment in this IMTA system were significantly lower than in monoculture bays. This was due to the efficient recycling of organic matter in the IMTA system, as revealed by historical data of annual production, dissolved inorganic nitrogen (DIN) concentration in seawater and TOC in sediment. Benthic nutrient fluxes in the IMTA system were mainly controlled by seawater temperature, dissolved oxygen (DO) and nutrient concentrations, which were strongly related to aquaculture activities. In June, the early growth phase of cultured finfish and bivalves contributed little to biodeposition, and benthic nutrient fluxes tended to be from the sediment to the seawater and contributed to algal growth. In September, the active growth of finfish and bivalves resulted in high concentrations of nutrients in the seawater and TOC in the sediment; 64% of the nitrogen and 25% of the phosphorus metabolized by bivalves were transferred from the seawater to the sediment.


KEY WORDS: Benthic nutrient fluxes · Pore water · Core incubation · Integrated multi-trophic aquaculture · IMTA · Sanggou Bay


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Cite this article as: Ning Z, Liu S, Zhang G, Ning X and others (2016) Impacts of an integrated multi-trophic aquaculture system on benthic nutrient fluxes: a case study in Sanggou Bay, China. Aquacult Environ Interact 8:221-232. https://doi.org/10.3354/aei00144

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