Potential linkage between sedimentary oxygen consumption and benthic flux of biogenic elements in a coastal scallop farming area, North Yellow Sea

Surface sediments were collected from a mariculture area adjacent to the Yangma Island suffering hypoxia in summer, and laboratory static incubation was conducted study sedimentary oxygen consumption (SOC) benthic fluxes of nutrients fluorescent dissolved organic matter (FDOM). Compared with some coastal areas, SOC studied relatively low summer value 2.34–6.03 mmol m−2 d−1. Sediment acted as an important source (except for nitrate) FDOM overlying water. Dissolved (DO) water could affect decomposition mode (SOM), i.e. aerobic anaerobic subsequently dominated release FDOM. When DO > 50 μmol l−1, it beneficial ammonium, silicate In contrast, conditions, < 100 stimulated sediment phosphate efflux. addition, scallop farming activities also affected flux mainly through biological deposition.