| Nitrogen and Phosphorus Diffusive Fluxes Across the Sediment-Water Interface in Estuarine and Coastal Tidal Flats |
| 刘敏 侯立军 等 |
| 关键词：氮 磷 沉积物水表面 海岸带 长江口 潮滩 有机物 水生生态系统 |
| 主要内容：Nitrogen and phosphorus contents are analyzed in the overlying waters and pore waters taken from the Changjiang Estuary and Shanghai coastal tidal flasts in this study,In addition,the diffusion fluxes of nitrogen and phophorus across the sediment-water interface in tidal flats are estimated according to the nutrient concentration gradients at the interface.It has been indicated that the concentrations of ammonium,nitrite,nitrate and dissolved phosphorus in overlying waters range from 0.0082-2.56,0.03～0.58，0.69～5.38and 0.035～0.53mg/L,respectively,while 0.0025～1.35mg/L for NH4^+-N,0.005～0.20mg/L for NO2^--N,0.61～1.14mg/L for NO3^-N and 0.11～0.53mg/L for DP insurface pore waters.The findings have revealed that ammonium,nitrite,nitrate and dissolved phosphorus diffusion fluxes across the sediment-water interface are between-0.024～0.99,-0.39～-0.0019,-3.09～-0.12 and -0.48～0.12μg/(cm^2·d) respectively,showing that the sediment in tidal flats is the source of phosphorus and an important sink for nitrogen in the waters. |
| 《海洋通报：英文版》 2002,4(1).-34-41 |
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