渤海水域生物理化环境现状研究

STUDY ON STATUS OF BIO-PHYSIC-CHEMICAL ENVIRONMENT IN THE BOHAI SEA

本文主要根据渤海增殖调查有关结果，着重讨论了渤海水化学环境现状及与饵料生物的关系，研究结果表明：（１）渤海水域温度呈典型温带水域海水特征，盐度、溶解氧及ｐＨ值适中，是温带各种海洋生物生长的良好环境；（２）营养盐与饵料生物及沿岸径流关系密切，具有明显的季节性变化；（３）与历史同期调查结果相比，无机氮有所上升，但无机磷和无机硅却下降较大，营养状况基本处于中下营养水平；（４）从Ｎ／Ｐ比值看，较历史资料上升较大，但仍低于Ｒｅｄｆｉｅｌｄ比值。

This paper mainly discussed the status of hydrochemistry environment and the relationship with bait organisms in the Bohai Sea The results show(1) Temperature of the Bo-hai Sea assumes the typical feature of temperate zone,the values of salinity、dissolved oxygen and pH are moderate and is the favourable environment for the growth of marine oganisms;(2)Nutrient salt is closeey relatied with bait organisms and coastal runoff ,and shows the typical seasonal variation;(3)Compared with historical data,the content of inorganic nitrogen is increased to some extent ,but those of phosphrate and silicate are considerably decreased,the status of nutrition is basically at a medium level;(4)N/P ratio is higher than that in history,but is sill less than'Redifield' ratio Inorganic nitrogen is still a restrictive factor for the groth of phytoplankton in the Bohai Sea