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Evaluating the influences of integrated culture on pelagic ecosystem by a numerical approach: A case study of Sungo Bay, China

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  • Sun, Ke
  • Zhang, Jihong
  • Lin, Fan
  • Ren, Jeffrey S.
  • Zhao, Yunxia
  • Wu, Wenguang
  • Liu, Yi

Abstract

With increasing concern over the environment in mariculture, the integrated culture has received extensive attention in recent years. For management of aquaculture farms, a biophysical model was developed to quantify the potential influence of bivalves-seaweed integrated culture on pelagic ecosystem. We developed NEMURO.CULTURE model by coupling the cultivated species (kelp Laminaria japonica, oyster Crassostrea gigas, scallop Chlamys farreri) and phosphorus-related variables with NEMURO (North Pacific Ecosystem Model for Understanding Regional Oceanography). The entire culture area of Sungo Bay was divided into five boxes according to the culture layout (kelp monoculture areas (K-area), co-culture areas (K&O-area), scallop monoculture areas (S-area), oyster monoculture areas (O-area), fish culture areas (F-area), and no-culture areas (Boundary)). The application of the model to the integrated culture system in Sungo Bay has shown promising results as the simulations reasonably agreed with the observations. The model was then used for scenario simulations to analyse the impact of mariculture. The simulation results showed that: 1) the concentration of phytoplankton and nutrients was largely constrained by cultivated kelps during the late stage of kelp culture period, while the influence of cultivated bivalves was relatively small; 2) the influence of cultivated kelps and bivalves could be transported to neighbor areas and weakened in the K-area, while the influence of cultivated fishes was confined near F-area; 3) the integrated culture of shellfish and seaweed in Sungo Bay would reduce the risk of eutrophication in spring; 4) the addition of phosphorus-related variables enabled the model to depict more details and phosphorus could be the limiting factor for phytoplankton growth at some time in Sungo Bay. This modelling work provides a quantitative tool for helping planning and management of coastal aquaculture.

Suggested Citation

  • Sun, Ke & Zhang, Jihong & Lin, Fan & Ren, Jeffrey S. & Zhao, Yunxia & Wu, Wenguang & Liu, Yi, 2020. "Evaluating the influences of integrated culture on pelagic ecosystem by a numerical approach: A case study of Sungo Bay, China," Ecological Modelling, Elsevier, vol. 415(C).
    • Handle: RePEc:eee:ecomod:v:415:y:2020:i:c:s0304380019303680
    DOI: 10.1016/j.ecolmodel.2019.108860
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    References listed on IDEAS

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    1. Ren, Jeffrey S. & Stenton-Dozey, Jeanie & Plew, David R. & Fang, Jianguang & Gall, Mark, 2012. "An ecosystem model for optimising production in integrated multitrophic aquaculture systems," Ecological Modelling, Elsevier, vol. 246(C), pages 34-46.
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    3. Aita, Maki Noguchi & Yamanaka, Yasuhiro & Kishi, Michio J., 2007. "Interdecadal variation of the lower trophic ecosystem in the northern Pacific between 1948 and 2002, in a 3-D implementation of the NEMURO model," Ecological Modelling, Elsevier, vol. 202(1), pages 81-94.
    4. Anonymous, 1950. "Food and Agriculture Organization," International Organization, Cambridge University Press, vol. 4(3), pages 479-480, August.
    5. Anonymous, 1950. "Food and Agriculture Organization," International Organization, Cambridge University Press, vol. 4(4), pages 671-672, November.
    6. Zuenko, Yury I., 2007. "Application of a lower trophic level model to a coastal sea ecosystem," Ecological Modelling, Elsevier, vol. 202(1), pages 132-143.
    7. Anonymous, 1950. "Food and Agriculture Organization," International Organization, Cambridge University Press, vol. 4(2), pages 313-314, May.
    8. Hashioka, Taketo & Yamanaka, Yasuhiro, 2007. "Ecosystem change in the western North Pacific associated with global warming using 3D-NEMURO," Ecological Modelling, Elsevier, vol. 202(1), pages 95-104.
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    1. Huang, Yu & Li, Zenghui & Sun, Changyang & Feng, Zhiwei & Li, Jingyao & Wei, Danyi & Wang, Bin & Jiang, Shang & Chen, Keliang & Sun, Xiang, 2023. "Using the roughness height and manning number in hydrodynamic model to estimate the impact of intensive oyster aquaculture by floating & fixed rafts on water exchange with an application in Qinzhou Ba," Ecological Modelling, Elsevier, vol. 476(C).

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