珍珠湾海水增养殖区2004～2008年丰水季节的水环境变化趋势分析

The Variation Trend Analysis of the Water Environment at the Zhenzhu Bay Mariculture Zone in High Water Period During 2004～2008

根据珍珠湾海水增养殖区2004~2008年夏秋两季的海洋环境监测数据,分析珍珠湾海水增养殖区5年来丰水季节水环境参数的变化趋势,讨论各特征参数之间的相互关系。结果表明,2004~2008年,珍珠湾海水增养殖区营养盐的含量和分布结构（N/P和Si/P）均发生了较明显的变化,表现为溶解态无机氮、活性磷酸盐呈增加趋势,N/P、Si/P值升高。珍珠湾海水增养殖区水质已由原来的氮限制变为磷限制,水质类型由良好类型演变为受到污染类型。

Using the monitoring marine environment data of the mariculture zone at the Zhenzhu Bay in the summer and fall from 2004 to 2008,the variation trend of the water environmental parameters in abundent water period during the past 5 years were analysed systematically and the relationships between the characteristic parameters were discussed.The results showed that the content and the distribution structure of nutrient salt（N/P and Si/P） at the Zhenzhu Bay mariculture zone had changed significantly in the past 5 years,which are continuous increase of dissolved inorganic nitroge,active phosphate and the ratio of N/P,Si/P.The seawater quality at the Zhenzhu Bay mariculture zone have changed from the nitrogen restriction into the phosphorus restriction now and have evolved from the well-type into the polluted type.