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DENG Ke, YANG Shilun, LIU Sumei, ZHANG Jing. Nutrient fluxes at sedimentwater interface in theeast Chongming tidal flat in winter[J]. Journal of East China Normal University (Natural Sciences), 2009, (3): 17-27.
Citation:
DENG Ke, YANG Shilun, LIU Sumei, ZHANG Jing. Nutrient fluxes at sedimentwater interface in theeast Chongming tidal flat in winter[J]. Journal of East China Normal University (Natural Sciences), 2009, (3): 17-27.
DENG Ke, YANG Shilun, LIU Sumei, ZHANG Jing. Nutrient fluxes at sedimentwater interface in theeast Chongming tidal flat in winter[J]. Journal of East China Normal University (Natural Sciences), 2009, (3): 17-27.
Citation:
DENG Ke, YANG Shilun, LIU Sumei, ZHANG Jing. Nutrient fluxes at sedimentwater interface in theeast Chongming tidal flat in winter[J]. Journal of East China Normal University (Natural Sciences), 2009, (3): 17-27.
〖JP2〗College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao Shandong266100, China;〖JP〗 2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University,Shanghai200062, China
Benthic nutrient fluxes and early diagentic processes were investigated in the east Chongming tidal flat of Yangtze estuary in winter. 〖JP2〗Significantly nutrient influxes from water column to sediment are observed in high marsh: benthic fluxes of NO-3, NO-2, NH+4, PO3-4 and SiO2-3 are (-0.896±0.540) mmol/m2/d,(-0.089±0.049) mmol/m2/d,〖JP〗(-2.002±0.642) mmol/m2/d,(-0.068±0.006) mmol/m2/d and (-1.334±0.381) mmol/m2/d individually (negative indicate nutrient absorption from water column to sediment and positive indicate nutrient release from sediment to water column). The exflux of NO-3 ((0.203±0.112) mmol/m2/d) and influxes of NO-2 ((-0.010±0.005) mmol/m2/d) and PO3-4 ((-0.005±0.002) mmol/m2/d) are observed in middle marsh. In low marsh, only PO3-4 ((-0.047±0.009) mmol/m2/d) influx is significant and there are large uncertainty in other nutrient fluxes due to strong wave disturbance. Diffusional nutrient fluxes contribute to the benthic nutrient fluxes slightly. Due to benthic flux differences among nutrients, benthic nutrient exchanges promote the growths of N/P and Si/P ratios in water column.