胶州湾围隔浮游生态系统氮、磷营养盐迁移-转化模型研究

Modeling nitrogen and phosphorus transport and transformation in pelagic ecosystem in mesocosm in Jiaozhou Bay

通过对目前生态动力学模型的总结和综合,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.分别利用1999年秋季和2000年夏季胶州湾围隔生态实验数据进行了模型和验证工作,成功地模拟了富加营养盐条件下围隔浮游生态系统中氮、磷营养盐生物化学迁移-转化过程,并确定了20余个参数的量值.

A dynamic model for nitrogen and phosphorus transport and transformation in mesocosm was established according to the summary and synthesis of the models available, in which 7 state variables （DIN, PO4--P, DON, DOP, phytoplankton, zooplankton and detritus） were included. Logically it had 5 modules--phytoplankton, zooplankton, dissolved inorganic nutrients, dissolved organic nutrients and detritus. The results showed that this model could simulate the variations of DIN, PO4--P and phytoplankton biomass in pelagic ecosystem in mesocosm properly, based on the site experiment data in Jiaozhou Bay in autumn 1999 and summer 2000. Not only the logical structure but also the model parameters were feasible, and more than 20 parameters were made certain during the simulation. All of these were necessary to study the control mechanism of nutrients biogeochemical cycling in Jiaozhou Bay and other China＇s coastal waters.