象山港不同温度区围隔浮游生态系统营养盐迁移—转化的模拟对比

Contrast of simulation nutrients transport and transformation with pelagic ecosystems of mesocosm in different temperature sections in Xiangshan Bay

为评估象山港海域电厂温排水对水体富营养化影响,以生态系统中氮、磷营养盐循环为主线,建立了适用于海洋围隔浮游生态系统的多变量的营养盐迁移—转化动力学模型。该模型包括浮游植物、浮游动物、溶解无机态营养盐、溶解有机态营养盐和生物碎屑5个模块,涉及溶解无机氮、磷酸盐、溶解有机氮、溶解有机磷、浮游植物、浮游动物和生物碎屑7个状态变量。利用2010年10月象山港其中一个温度区的围隔生态实验数据成功地进行了模型的验证,确定了相关参数的量值,并用该参数同时模拟3个不同温度区围隔氮、磷营养盐生物化学迁移—转化过程,进而得出温度对围隔浮游生态系统氮、磷营养盐迁移—转化影响的结论。结果表明,象山港电厂温排水加剧了受纳水体的富营养化程度。

To assess the effects of cooling water from power plant on eutrophication in Xiangshan Bay Harbor,a dynamic model for nitrogen and phosphorus transport and transformation in mesocosm was established,in which 7 state variables（DIN,PO3-4-P,DON,DOP,phytoplankton,zooplankton and detritus）were included.Logically it had 5 modules—phytoplankton,zooplankton,dissolved inorganic nutrients,dissolved organic nutrient s and detritus.Not only the results showed that this model could simulate the variations of nitrogen and phosphorus nutrients in the pelagic ecosystem in mesocosm properly,based on the experiment data from one temperature section in Xiangshan Bay in October 2010,but also the conclusion was drawn that the effect of temperature elevation on Nitrogen and Phosphorus Transport and Transformation from simulation of mesocosms that belong to three different temperature sections.The results show that the cooling waters increased eutrophication of the receiving water in Xiangshan Bay.