Research on the Distribution Features of and Interrelationships Between the Dissolved Oxygen, Salinity, pH Value and Nutrient Salts in the Honghai Bay Waers

摘要

In this paper, the environmental factors are surveyed of the mariculture waters of the Honsha Bay for the late spring to the early summer (June) in 1998. The distribution features and variation laws of dissolved oxygen, salinity, pH value and nutrient salts in the sea water are expounded. Also discussed are their relationships between each other. The results show that the contains of dissolved oxygen and pH value in the sea water increase with the increasing temperature from north (except for pH value in the sea water increase with the increasing temperature from north (except for No. 15￣17 stations) to south (expect for No.6 satin). At the same time it is affirmed that photosynthesis is the major cause of the high contents of dissolved oxygen and pH value. And he nutrient salt shows a negative correlation with salinity. The total content of phytoplanton obviously increased wiht the reduction of nutrient salts from north to south.