Nutrient fluxes across sediment-water interface in Bohai Bay Coastal Zone, China

Di Mu, Dekui Yuan, Huan Feng, Fangwei Xing, Fang Yenn Teo, Shuangzhao Li

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)705-714
Number of pages10
JournalMarine Pollution Bulletin
Volume114
Issue number2
DOIs
StatePublished - 30 Jan 2017

Keywords

  • Environmental factors
  • Nutrient flux
  • Sediment-water interface
  • Tianjin Coastal Zone, Bohai Bay

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