Sohma A, Sekiguchi Y, Yamada H, Sato T, Nakata K
Environment, Energy and Resources Division, Fuji Research Institute Corporation, Japan.
Mar Pollut Bull. 2001 Jul-Dec;43(7-12):187-208. doi: 10.1016/s0025-326x(01)00083-2.
A new coastal marine ecosystem model was developed, which was composed of pelagic and benthic ecosystems, and was applied to Mikawa Bay, Japan. This model deals with variations of biochemical and physical interactions among dissolved oxygen and C-N-P species (composition formed out of carbon, nitrogen and phosphorus elements) so that it resolves the flux dynamics of carbon, nitrogen, phosphorus and oxygen elements. The physical and biochemical mechanism figured in this model is constructed for the purpose of simulating the estuarine lower trophic ecosystem, in areas where the sea was too deep for light to reach the sea-bottom. As a result of coupling the benthic with pelagic system, the effect of process of sedimentation and nutrient diffusion back to the pelagic system could be indicated. In addition, by implementing the tidal flat ecosystem model's calculation result, the integrated model can include the effect of water purification in tidal flats where the light can reach the sea-bottom, and where seaweed, sea grass and benthic algae exist. In this study, the model indicates that oxygen-depleted water exists at the sea-bottom especially in summer mainly caused by an increase of oxygen consumption in the benthic system and a decrease of the vertical mixing water process. Furthermore, by comparing the case--with the tidal flat ecosystem model and the case without it, the effect of water purification of tidal flat estuaries was indicated. From the viewpoint of a short time scale, the tidal flat has the potential to restrict red tide (rapid increase of phytoplankton), and from the viewpoint of a long time scale, it restricts the sedimentation of detritus. Restricting the sedimentation prevents oxygen-depleted water occurring in the coastal marine system of Mikawa Bay.
开发了一种新的沿海海洋生态系统模型，该模型由浮游生态系统和底栖生态系统组成，并应用于日本三河湾。该模型处理溶解氧与碳 - 氮 - 磷物种（由碳、氮和磷元素组成的成分）之间生物化学和物理相互作用的变化，从而解析碳、氮、磷和氧元素的通量动态。该模型中构建的物理和生物化学机制旨在模拟河口低营养级生态系统，适用于海水深度太深以至于光线无法到达海底的区域。通过将底栖系统与浮游系统耦合，可以显示沉积过程和营养物质扩散回浮游系统的影响。此外，通过实施潮滩生态系统模型的计算结果，该综合模型可以纳入潮滩水净化的影响，潮滩区域光线可以到达海底，且存在海藻、海草和底栖藻类。在本研究中，该模型表明，特别是在夏季，海底存在缺氧水，这主要是由底栖系统中氧气消耗的增加和垂直混合水过程的减少导致的。此外，通过比较有潮滩生态系统模型的情况和没有该模型的情况，显示了潮滩河口的水净化效果。从短时间尺度来看，潮滩有抑制赤潮（浮游植物迅速增加）的潜力，从长时间尺度来看，它限制了碎屑的沉积。限制沉积可防止三河湾沿海海洋系统中出现缺氧水。
