Abstract
A nutrient-phytoplankton-zooplankton-detritus (NPZD) type of marine ecosystem model was developed in this study, and was further coupled to a three-dimensional primitive-equation ocean circulation model with a river discharge model and a solar radiation model to reproduce the dynamics of the low nutrition level in the Bohai Sea (BS). The simulation results were validated by observations and it was shown that the seasonal variation in the phytoplankton biomass could be characterized by the double-peak structure, corresponding to the spring and summer blooms, respectively. It was also found that both nitrogen and phosphate declined to the lowest level after the onset of the summer bloom, since the large amounts of nutrients were exhausted by phytoplankton for photosynthesis, and the concentrations of nutrients could resume in winter after a series of the biogeochemical-physical processes. By calculating the nitrogen/phosphorus (N/P) ratio, it is easy to see that the phytoplankton dynamics is nitrogen-limited as a whole in BS, though the phosphorus limitation may occur in the Yellow River (YR) Estuary where the input of riverine nitrogen is much more than that of phosphate.
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This work was supported by Key Subject Fund of Shanghai Education Committee (No. J50702), Open Foundation of the Key Subject in Environmental Engineering of Shanghai Ocean University (No.B820609000404), and Initial Foundation for Ph. D. of Shanghai Ocean University (No.B820607000402).
Hao Liu received the B.Eng. degree in marine engineering and the M.Eng. degree in environmental science from the Dalian Maritime University, Dalian, PRC in 1995 and 2003, respectively. In 2005, he received the Ph.D. degree in environmental science from Institute of Oceanology, Chinese Academy of Sciences, Qingdao, PRC. In 2007, he finished his postdoctoral research at Xiamen University, and then got an associate professor position at Yantai Institute of Coastal Research, Chinese Academy of Sciences, Yantai, PRC. He is currently an associate professor at Shanghai Ocean University, PRC.
His research interests include the oceanic process in coastal waters by means of numerical modeling.
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Liu, H. Development and application of a marine ecosystem dynamic model. Int. J. Autom. Comput. 8, 154–160 (2011). https://doi.org/10.1007/s11633-011-0568-2
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DOI: https://doi.org/10.1007/s11633-011-0568-2