Inorganic nitrogen and phosphate and potential eutrophication assessment in Liaodong bay

摘要: On basis of field data measured during 4 cruises from June to September in 2002, variation feature inorganic nitrogen and phosphate Liaodong Bay was analyzed. Regression analyses NH4+(-)N, NO3-(-)N, NO2-(-)N PO4(3-)-P versus pH as well salinity were also conducted. Finally, potential eutrophication assessed. It is shown that vary with different months locations. In coast areas are mainly affected by rivers, while central the bay, they subject marine biochemical process. Ratio rises 60.6 52.5 early June, then drops 39, all far above Redfield value 16. Inorganic show correlation. For example, correlation coefficient NO2(-)-N even reaches 0.93. During total 212.0 microg/L, 10.1 N/P 50.77. Potential assessment indicates survey period can be classified a phosphate-limiting moderate-level nutrient area.