长江口滨岸湿地沉积物对上覆水体中无机氮的净化能力估算(英文)

编号 zgly0001586029

文献类型 期刊论文

文献题名 长江口滨岸湿地沉积物对上覆水体中无机氮的净化能力估算(英文)

作者 王军  陈振楼  王东启  孙小静  许世远 

作者单位 KeyLaboratoryofGeo-informationScienceoftheMinistryofEducation  EastChinaNormalUniversity  SchoolofResourcesandEnvironmentScience  EastChinaNormalUniversity 

母体文献 Journal of Geographical Sciences 

年卷期 2009年04期

年份 2009 

分类号 P342 

关键词 nitrogen  eliminatingcapability  wetlands  estuarineenvironment  YangtzeEstuary 

文摘内容 Estuarine wetlands serve as a natural barrier to remove the land-generated pollutants and attenuate the pollutant load from the land to the sea.As one of the most important estuarine wetlands,the Yangtze estuarine wetlands have attracted particular interests in the biogeochemical studies of nutrients.The objectives of this study were to characterize the seasonal and spatial distribution of dissolved inorganic nitrogen(DIN) fluxes across the sediment-water interface;to calculate the total DIN fluxes in a year and different seasons;and to evaluate the DIN removing capability of the sediment in the tidal wetlands of the Yangtze Estuary.The spatial distribution of DIN fluxes shows complicated seasonal variations and spatial differences.The annual DIN fluxes range from-22.22 mmol N m-2 h-1 to 19.54 mmol N m-2 h-1,with an average of-1.48±1.34 mmol N m-2 h-1.The tidal wetlands in the Yangtze Estuary behave as a source of water DIN in spring when DIN is released from sediment into overlying water,and the released amount of DIN is 1.33×104 tons of nitrogen(T N).In summer,autumn and winter,the sediment absorbs the DIN from the overlying water,and the absorbed amounts of DIN are 4.36×104 T N,6.81×104 T N and 2.24×104 T N,respectively.The average amount of DIN in overlying water of the Yangtze Estuary is 52.6×104 T N yr-1,and the perennial average amount of DIN absorbed from the overlying water by the sediment is 12.1×104 T N yr-1.The annual DIN elimination rate of the tidal wetlands was 23.0%.