Spatial and temporal distribution of nutrient in Jiaozhou bay in 2013
LI Xin-yu1,2, KANG Mei-hua1,2, HOU Peng-fei1,2, GAO Xiang1,2, LI Na1,2, YAO Qing-zhen1
1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;
2. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
Abstract：Spatial and temporal distributions of dissolved inorganic nutrients in the Jiaozhou bay were discussed, based on the data collected monthly from November 2012 to November 2013.NO3-N is the predominantspeciation of DIN, while NO2-N is the lowest speciation.Influenced by the terrestrial input, the concentration of dissolved inorganic nutrients inside Jiaozhou bay is higher than that of outside.Concentrations of different dissolved inorganic nutrients displayed obviously seasonal variability inside the Jiaozhou bay.Highest concentrations of dissolved inorganic nutrients were in summer (July), and the lowest were in winter and spring.No obviously seasonal variabilityof dissolved inorganic nutrients were found in the middle and outside of the bay due to the influence of terrestrial input is not as strong as that inside the bay.Compared with 1990s, the concentrations of NH4-N and PO4-P decreased, while the concentrations of NO3-N and SiO3-Si increased totwice of those in 1990s'.The concentration of NO2-N wasrelatively stable.
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