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Modelling mussel ( Mytilus spp. ) microplastic accumulation
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Researchers developed a dynamic energy budget model to simulate how mussels accumulate microplastics from their environment, validated against field data from both wild and farmed mussel populations. The model can help predict microplastic body burdens in commercially important filter feeders under different environmental conditions.
Abstract. Microplastics (MPs) are a contaminant of growing concern due to their widespread distribution and interactions with marine species, such as filter feeders. To investigate the MPs accumulation in wild and cultured mussels, a dynamic energy budget (DEB) model was developed and validated with the available field data of Mytilus edulis (M. edulis, wild) from the North Sea and Mytilus galloprovincialis (M. galloprovincialis, cultured) from the northern Ionian Sea. Towards a generic DEB model, the site-specific model parameter, half-saturation coefficient (Xk), was applied as a power function of food density for the cultured mussel, while for the wild mussel it was calibrated to a constant value. The DEB-accumulation model simulated the uptake and excretion rate of MPs, taking into account environmental characteristics (temperature and chlorophyll a). An accumulation of MPs equal to 0.53 particles per individual (fresh tissue mass 1.9 g) and 0.91 particles per individual (fresh tissue mass 3.3 g) was simulated for the wild and cultured mussel after 4 and 1 years respectively, in agreement with the field data. The inverse experiments investigating the depuration time of the wild and cultured mussel in a clean-from-MPs environment showed a 90 % removal of MPs load after 2.5 and 12 d respectively. Furthermore, sensitivity tests on model parameters and forcing functions highlighted that besides MPs concentration, the accumulation is highly dependent on temperature and chlorophyll a of the surrounding environment. For this reason, an empirical equation was found, directly relating the environmental concentration of MPs, with the seawater temperature, chlorophyll a, and the mussel's soft tissue MPs load.
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Modelling mussel ( Mytilus spp.) microplastic accumulation
AI summary Read the abstract
Researchers applied a dynamic energy budget (DEB) model to simulate how mussels accumulate microplastics under varying exposure conditions, finding that feeding behavior and particle characteristics strongly influence uptake. This modeling approach provides a framework for predicting microplastic bioaccumulation in filter-feeding marine organisms.
review of "Modelling mussel (Mytilus spp.) microplastic accumulation" by Stamataki et al.
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This peer review provides detailed technical feedback on a Dynamic Energy Budget model paper simulating microplastic accumulation in wild and cultured mussels. The reviewer comments positively on the approach while suggesting refinements to uncertainty analysis and model validation.
review for the manuscript entitled “Modelling mussel (Mytilus spp.) microplastic accumulation."
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This is a peer review document providing substantive feedback on a Dynamic Energy Budget model paper about microplastic accumulation in mussels, commenting on model calibration, data validation, and uncertainty analysis.
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Researchers studied the effects of polystyrene microplastics on the energy budget of mussels using a cellular energy allocation approach. They found that higher concentrations of microplastics increased energy demands while depleting carbohydrate, lipid, and protein stores, with lipid and protein levels failing to fully recover even after the microplastics were removed.
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