Development and application of a marine ecosystem dynamic model
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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.
KeywordsMarine ecosystem dynamic model nutrient algae blooms euphotic zone Bohai Sea
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- Y. Cui, B. Chen, S. Ren. Study on status of bio-physicchemical environment in the Bohai Sea. Journal of Fishery Sciences of China, vol. 3, no. 2, pp. 1–12, 1996. (in Chinese)Google Scholar
- H. Liu, B. S. Yin. A real-time irradiation model. Oceanologia Et Limnologia Sinica, vol. 37, no. 6, pp. 493–497, 2006. (in Chinese)Google Scholar
- A. C. Redfield, B. Ketchum, F. A. Richards. The influence of organisms on the composition of seawater. The Sea, vol. 2, pp. 26–77, 1963.Google Scholar
- G. Y. Yu, Z. M. Wu, Z. N. Zhang. A pelagic ecosystem model of simulation of northern part of Jiaozhou Bay I. Introduction to pelagic ecosystem model. Journal of Ocean University of Qingdao, vol. 29, no. 3, pp. 421–428, 1999. (in Chinese)Google Scholar
- F. Chai. Origin and Maintenance of High Nitrate Condition in the Equatorial Pacific, a Biological-Physical Model Study, Ph.D. dissertation, Duke University, USA, 1995.Google Scholar
- P. Zhang, Z. L. Shen. Waters characteristics of nutrient limitation. Marine Sciences, vol. 25, no. 6, pp. 16–19, 2001. (in Chinese)Google Scholar
- G. Z. Chen, G. Y. Niu, S. C. Wen. Marine Atlas of Bohai Sea, Huanghai Sea, East China Sea, Beijing, PRC: Ocean Press, 1992. (in Chinese)Google Scholar
- Z. L. Fei, X. H. Mao, M. Y. Zhu, B. Li, B. H. Li, Y. H. Guan, X. S. Zhang, R. H. Lv. The study of primary productivity in the Bohai Sea: Chlorophyll a, primary productivity and potential fisheries resources. Marine Fisheries Research, vol. 12, pp. 55–69, 1991. (in Chinese)Google Scholar
- G. Radach, A. Moll. Review of three-dimensional ecological modelling related to the North Sea shelf system, Part II: Model validation and data needs. Oceanography and Marine Biology, vol. 44, no. 1, pp. 1–60, 2006.Google Scholar