Numerical assessment of the environmental impacts of deep sea cage culture in the Yellow Sea, China

文献类型： 外文期刊

第一作者： Zhao, Yunxia

作者： Zhao, Yunxia;Zhang, Jihong;Liu, Yi;Sun, Ke;Wu, Wenguang;Zhao, Yunxia;Zhang, Jihong;Liu, Yi;Sun, Ke;Wu, Wenguang;Zhang, Cong;Teng, Fei;Zhang, Cong;Teng, Fei

作者机构：

关键词： Environmental impacts; Deep sea cage culture; Numerical model; Sea bass; The Yellow Sea

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 706 卷

页码：

收录情况： SCI

摘要： In light of environmental deterioration in coastal areas, deep sea cage aquaculture is becoming an increasingly attractive mode of mariculture. A key factor in determining the potential of deep sea cage aquaculture is to evaluate the environmental impacts of these practices. Here, a numerical model consisting of coupled hydrodynamic, tracer-tracking- and 3-D Lagrangian particle-tracking models was set up and applied to evaluate the environmental impacts of deep sea cage cultivation of sea bass (Lateolabrax japonicas) in the Yellow Sea, China. The model was verified using water level data on August 1-31,2013 and nutrient concentration in water and surface sediments in May, August, and November 2013, and January 2019. Results show that the model successfully captures the characteristics of local tidal currents and the total particulate nitrogen and phosphorus concentrations of the underlying sediments. Water quality simulations indicate that deep sea cages account for 26% of the total dissolved inorganic nitrogen and 19% of the active phosphorus content. Residual feed particles are predicted to fall in an ellipse centered on the cage location, with a long axis of 200 m and a short axis of 50 m, Feces are predicted to fall in an ellipse with a long axis of 1400 m and a short axis of 600 m. The Superposition particles are predicted to settle in an ellipse with a long axis of 320 m and a short axis of 150 m The model results indicate that installation of all deep sea cages will lead to acceptable levels of water quality, but that sediments may become polluted. The coupled model can be used to predict the environmental impacts of deep sea cage farming and provide a useful tool for designing the layout of integrated multi-trophic aquaculture of organic extractive or inorganic extractive species. (C) 2019 Elsevier B.V. All rights reserved.

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