期刊
MARINE POLLUTION BULLETIN
卷 114, 期 2, 页码 705-714出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.10.056
关键词
Nutrient flux; Sediment-water interface; Environmental factors; Tianjin Coastal Zone, Bohai Bay
资金
- Key Project of Natural Science Foundation of Tianjin [16JCZDJC39400]
- Science and Technology Pillar Program of Hebei Province [14273105D, 12273301]
Sediment cores and overlying water samples were collected at four sites in Tianjin Coastal Zone, Bohai Bay, to investigate nutrient (N, P and Si) exchanges across the sediment-water interface. The exchange fluxes of each nutrient species were estimated based on the porewater profiles and laboratory incubation experiments. The results showed significant differences between the two methods, which implied that molecular diffusion alone was not the dominant process controlling nutrient exchanges at these sites. The impacts of redox conditions and bioturbation on the nutrient fluxes were confirmed by the laboratory incubation experiments. The results from this study showed that the nutrient fluxes measured directly from the incubation experiment were more reliable than that predicted from the porewater profiles. The possible impacts causing variations in the nutrient fluxes include sewage discharge and land reclamation. (C) 2016 Elsevier Ltd. All rights reserved.
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