Abstract:Based on the cruises carried out in the North Yellow Sea in July 2011(summer) and October 2011(autumn), spatial and temporal distribution and influence factors of nutrients were discussed. The mean concentrations of nutrients in summer and autumn in the North Yellow Sea were respectively NO3- (1.57±1.71) and (5.93±3.84) μmol/L, NO2- (0.22±0.18) and (0.88±0.93) μmol/L, PO43- (0.22±0.13) and (0.40±0.23) μmol/L, Si(OH)4 (4.98±2.23) and (6.71±3.24) μmol/L, NH4+ (1.35±0.90) and (1.23±0.69) μmol/L. NO3- accounted for 49% of dissolved inorganic nitrogen in summer and 74% in autumn. The concentrations of nutrients in the surface layer in coastal areas were higher than that in the middle of the sea in both spring and summer, the concentrations of nutrients in the bottom layer were higher than that in the surface layer, the concentrations among the cold water mass area were high. For each transect, influenced by cold water mass and water exchange, the stratification of nutrients was obvious and the concentrations increased from the surface to the bottom. N/P, Si/N and Si/P ratio were higher in coastal areas than that in the middle of the sea in both the surface and the bottom, and the nutrient limiting phytoplankton growth was phosphorus in summer.
李延伟, 胡莹莹, 陈淑梅. 夏、秋季北黄海营养盐的时空分布特征及其影响机制[J]. 中国环境科学, 2013, 33(6): 1060-1067.
LI Yan-Wei, HU Ying-Ying, CHEN Shu-Mei. Distribution and influence factors of nutrients in the North Yellow Sea in Summer and Autumn.. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(6): 1060-1067.