Journal
MARINE POLLUTION BULLETIN
Volume 124, Issue 2, Pages 856-870Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.02.033
Keywords
Dissolved organic nitrogen; Bioavailability; Degradation dynamics; Biogeochemical model; Bohai Sea
Funding
- Natural Science Foundation of China [41676062]
- NSFC-Shandong Joint Fund for Marine Science Research Centers [U1606404]
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Dissolved organic nitrogen (DON) is the major nitrogen form in the Bohai Sea. Land-based DON is released into the nitrogen pool and degraded by planktonic microbiota in coastal ocean. In this study, we evaluated the degradation of land-based DON, particularly its dynamics and bioavailability, in coastal water by linking experiment and modeling. Results showed that the degradation rate constant of DON from sewage treatment plant was significantly faster than those of other land-based sources (P < 0.05). DON was classified into three categories based on dynamics and bioavailability. The supply of dissolved inorganic nitrogen (DIN) pool from the DON pool of Liao River, Hai River, and Yellow River was explored using a 3D hydrodynamic multi-DON biogeochemical model in the Bohai Sea. In the model, large amounts of DIN were supplied from DON of Liao River than the other rivers because of prolonged flushing time in Liaodong Bay. (C) 2017 Elsevier Ltd. All rights reserved.
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