Zheng Bing-Hui, Qin Yan-Wen, Meng Wei, Zhang Lei, Wan Jun
River and Coastal Environment Research Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Huan Jing Ke Xue. 2007 Mar;28(3):494-9.
The local condition and the historical evolvement trend of nutrient elements were studied by the collection and analysis of the local investigation and the historical data. The surface seawaters are under the bad nitrogen contaminative conditions. Beitang and Dagu estuary are the main contaminative sources of inorganic nitrogen and phosphorus. The historical evolvement trend of DIN and DIP has close correlation with the yearly runoff, especially in the coastal areas near Dagu estuary. The remarkable positive correlationship between DIN, DIP and the yearly runoff indicates that the main pollution emission source of nutrient elements is the exogenous discharge input. The nutrients structures have changed greatly from 1985 to 2003. Nitrogen limiting in 1985 has changed into phosphorus limiting in 2003, which will influence the structure of phytoplanktons in Bohai Bay.
通过收集和分析当地调查及历史数据，研究了营养元素的局部状况和历史演变趋势。表层海水处于不良的氮污染状况下。北塘和大沽河口是无机氮和磷的主要污染源。溶解无机氮（DIN）和溶解无机磷（DIP）的历史演变趋势与年径流量密切相关，尤其是在大沽河口附近的沿海地区。DIN、DIP与年径流量之间显著的正相关关系表明，营养元素的主要污染排放源是外源排放输入。1985年至2003年期间，营养结构发生了很大变化。1985年的氮限制已转变为2003年的磷限制，这将影响渤海湾浮游植物的结构。
