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

Z Ning; S Liu; G Zhang; X Ning; R Li; Z Jiang; J Fang; J Zhang

doi:10.3354/aei00144

Aquaculture Environment Interactions (Apr 2016)

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

Z Ning,
S Liu,
G Zhang,
X Ning,
R Li,
Z Jiang,
J Fang,
J Zhang

Affiliations

Z Ning: Key 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
S Liu: Key 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
G Zhang: Key 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
X Ning: Key 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
R Li: Key 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
Z Jiang: Key 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
J Fang: Key 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
J Zhang: State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, PR China

DOI: https://doi.org/10.3354/aei00144
Journal volume & issue: Vol. 8
pp. 221 – 232

Abstract

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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.

Published in Aquaculture Environment Interactions

ISSN: 1869-215X (Print); 1869-7534 (Online)
Publisher: Inter-Research
Country of publisher: Germany
LCC subjects: Agriculture: Aquaculture. Fisheries. Angling; Science: Biology (General): Ecology
Website: http://www.int-res.com/journals/aei/aei-home/

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