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    Numerical modelling of spatio-temporal variability of growth of Mytilus edulis (L.) and influence of its cultivation on ecosystem functioning

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    Author
    Dabrowski, T.
    Lyons, K.
    Curé, M.
    Berry, A.
    Nolan, G.
    Keyword
    DEB theory
    Mytilus edulis
    Biogeochemical model
    Phytoplankton dynamics
    Nutrient dynamics
    Numerical modelling
    Date
    2013
    Publisher
    Elsevier
    
    Metadata
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    Abstract
    One of the key needs of the aquaculture industry is the implementation of effective management methods to ensure the sustainability, economic viability and minimization of negative impacts on both human and ecosystem well-being. The authors developed a Fortran 90 implementation of the dynamic energy budget (DEB) model for Mytilus edulis. The model has been further developed to include physiological interactions with the ecosystem and coupled to a biogeochemical nutrient–phytoplankton–zooplankton–detritus (NPZD) model. Phytoplankton and detritus uptakes, oxygen utilisation, CO2 production, NH4 excretion, egestion of faeces, and assimilation of food are modelled. A novel approach was derived that accounts for the allocation of C and N in mussel flesh and shell organic fraction. The DEB–NPZD model has been subsequently coupled to a high resolution three dimensional numerical coastal ocean model of the south–west coast of Ireland, where approximately 80% of national rope mussel is produced annually. Simulations have been carried out for the time period July 2010–June 2011, for which the field data on mussel biometrics and ambient seawater properties were collated. The model accurately reproduced the spatio-temporal variability in blue mussel growth. It is also shown that the ecosystem dynamics is affected by the presence of aquaculture farms. The modelling system presented allows for the assessment of the impacts of aquaculture activities on water quality, quantification of the production and ecological carrying capacities and improvement of our understanding of the ecosystem functioning with particular emphasis on interactions between various trophic levels.
    URI
    http://hdl.handle.net/10793/886
    Description
    peer-reviewed
    Citation
    Dabrowski, T., Lyons, K., Curé, M., Berry, A., & Nolan, G. (2013). Numerical modelling of spatio-temporal variability of growth of Mytilus edulis (L.) and influence of its cultivation on ecosystem functioning. Journal of Sea Research, 76, 5–21. doi:10.1016/j.seares.2012.10.012
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