Assessing the bio-mitigation effect of integrated multi-trophic aquaculture on marine environment by a numerical approach

作者：Zhang Junbo^*; Kitazawa Daisuke

来源：Marine Pollution Bulletin, 2016, 110(1): 484-492.

DOI：10.1016/j.marpolbul.2016.06.005

• Integrated multi-trophic aquaculture
• IMTA
• MEC ocean model
• Impact assessment
• Bio-mitigation effect

With increasing concern over the aquatic environment in marine culture, the integrated multi-trophic aquaculture (IMTA) has received extensive attention in recent years. A three-dimensional numerical ocean model is developed to explore the negative impacts of aquaculture wastes and assess the bio-mitigation effect of IMTA systems on marine environments. Numerical results showed that the concentration of surface phytoplankton could be controlled by planting seaweed (a maximum reduction of 30%), and the percentage change in the improvement of bottom dissolved oxygen concentration increased to 35% at maximum due to the ingestion of organic wastes by sea cucumbers. Numerical simulations indicate that seaweeds need to be harvested in a timely manner for maximal absorption of nutrients, and the initial stocking density of sea cucumbers >3.9 individuals m(-2) is preferred to further eliminate the organic wastes sinking down to the sea bottom.

• 出版日期2016-9-15