华东师范大学学报(自然科学版) ›› 2009, Vol. 2009 ›› Issue (3): 17-27.

• 滨海湿地生态学与生物地球化学 • 上一篇    下一篇

长江口崇明东滩冬季沉积物水界面营养盐通量

邓可1,杨世伦2,刘素美1,张经2   

  1. 1. 中国海洋大学 化学化工学院，山东 青岛266100； 2. 华东师范大学 河口海岸学国家重点实验室，上海200062
  • 收稿日期:2008-11-23 修回日期:2009-02-23 出版日期:2009-05-25 发布日期:2009-05-25
  • 通讯作者: 邓可

Nutrient fluxes at sedimentwater interface in theeast Chongming tidal flat in winter

DENG Ke1,YANG Shiun2,LIU Sumei1,ZHANG Jing   

  1. 1. 〖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
  • Received:2008-11-23 Revised:2009-02-23 Online:2009-05-25 Published:2009-05-25
  • Contact: DENG Ke

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摘要： 对长江口崇明东滩冬季沉积物中营养盐早期成岩过程和沉积物水界面营养盐通量及其影响因素进行了研究.其中，高潮滩对各项营养盐均有显著吸收，中潮滩主要表现为对TIN和SiO2-3的释放，低潮滩由于受到局部水动力作用影响，营养盐通量存在较大不确定性.分子扩散作用对沉积物水界面营养盐通量的贡献不大.由于潮滩对于水体PO3-4浓度的影响能力高于对TIN和SiO2-3的影响能力，潮滩能够在一定程度上促进水体中N/P和Si/P比的增加.

关键词: 沉积物水界面营养盐通量, 河口, 潮间带, 崇明东滩, 沉积物水界面营养盐通量, 河口, 潮间带, 崇明东滩

Abstract: 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, PO3-4 and SiO2-3 are (-0.896±0.540) mmol/m2/d,(-0.089±0.049) mmol/m2/d,〖JP〗(-2.002±0.642) mmol/m2/d,(-0.068±0.006) mmol/m2/d and (-1.334±0.381) mmol/m2/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/m2/d) and influxes of NO-2 ((-0.010±0.005) mmol/m2/d) and PO3-4 ((-0.005±0.002) mmol/m2/d) are observed in middle marsh. In low marsh, only PO3-4 ((-0.047±0.009) mmol/m2/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.

Key words: estuary, salt marsh, east Chongming tidal flat, benthic nutrient fluxes, estuary, salt marsh, east Chongming tidal flat

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