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引用本文:杨龙元,WayneS.Gardner.休伦湖Saginaw湾沉积物反硝化率的测定及其时空特征.湖泊科学,1998,10(3):32-38. DOI:10.18307/1998.0306
Yang Longyuan,Wayne S. Gardner.The Sediment Denitrification Rates Measurement and Their Spatial and Temporal Character Analysis in Saginaw Bay, Lake Huron. J. Lake Sci.1998,10(3):32-38. DOI:10.18307/1998.0306
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休伦湖Saginaw湾沉积物反硝化率的测定及其时空特征
杨龙元1, WayneS.Gardner2
1.中国科学院南京地理与湖泊研究所, 南京 210008;2.NOAA/GreatLakesEnvironmentalLaboratory, AnnArbor Michigan 48105 USA
摘要:
用N2生成法测定了北美休伦湖Saginaw湾1995年夏季7、8月份沉积物反硝化率,Saginaw湾内湾的沉积物反硝化率为16.0-39.6μmolN2/(m2·h),外湾沉积反硝化率为22.7 -26.1μmolN2/(m2·h),比较了不同湖泊沉积物反硝化率数值大小,指出休伦湖Saginaw湾水体现阶段的营养状况为贫-中营养水平.内外湾沉积物反硝化率数值波动大小与Saginaw河及休伦湖的影响有关;N2:TIN通量比值有不随采样时间的变化而变更等特性.在反硝化率测定过程中,反硝化率与O2消耗率之间有明显的正相关关系;沉积物上覆水中NH+4与NO-3之间通量值在变化趋势上有明显的负相关关系。
关键词:  反硝化率  沉积物  休伦湖  N2生成法
DOI:10.18307/1998.0306
分类号:
基金项目:中国科学院项目“中国生态系统研究网络(CERN)”项目美国商业部大气海洋局(NOAA)大湖环境研究实验室共同资助
The Sediment Denitrification Rates Measurement and Their Spatial and Temporal Character Analysis in Saginaw Bay, Lake Huron
Yang Longyuan1, Wayne S. Gardner2
1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008;2.National Oceanic and Atmospheric Administration, Great Lakes Environmental Research Laboratory, Michigan 48105, USA
Abstract:
The denitrfication rates (DR) of sediment in Saginaw Bay, Lake Huron, have been measured with No production method. Triplicate samples of sediment core were collected at two GLERL long-term monitoring sites of the Bay in July and August of 1995. The DR is 16. 0-39,6 and 22. 7-26. 1 micromol N:/(m2·h) in the Inner and Outer regions of Saginaw Bay. respectively. The spatial and temporal characters of DR in Saginaw Bay was studied also in this paper, The DR was influenced by the interaction between the Saginaw River as a main pollution source and Lake Huron as a reservoir of high quality water. According to the measured DR, it has been evaluated that the nutrient condition of Saginaw Bay is oligotrophic/mesotrophic level in the present period. The molar ratios of N2 : TIN were kept constant at both sampling sites and not seriously changed with sampling time. The DR was positively correlated to O2 consumption rates in the headspace of timecours. Additionally,a negative correlationship between NH+4 and NO-3 concentrations in the overlying water was found.
Key words:  Denitrification rate  sediment  N2 production method  Lake Huron
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