| 引用本文: | 杨龙元,Wayne S. Gardner.北美休伦湖沙金湾中沉积物反硝化率的测定及其特征.湖泊科学,1998,10(s1):283-293. DOI:10.18307/1998.sup31 |
| YANG Longyuan,Wayne S. Gardner.The Measurement and Character of Sediment Denitrification Rates in Saginaw Bay, Lake Huron. J. Lake Sci.1998,10(s1):283-293. DOI:10.18307/1998.sup31 |
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| 北美休伦湖沙金湾中沉积物反硝化率的测定及其特征 |
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杨龙元1, Wayne S. Gardner2
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1.Nanjing Institute of Geography and Limnology, CAS, Nanjing, 210008, China;2.National Oceanic and Atmospheric Administration, Great Lakes Environmental Research Laboratory USA(Present address:The University of Texas at Austin Marine science Institute 750 Chennalview Drive Port Aransas, Texas 78373, USA
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| 摘要: |
It have been measured the denitrification rates (DR) of sediment in Saginaw Bay, Lake Huron, by N2 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 are 48.81 -24.99 and 32.81-40.51 micromol N2 -2h-1 in the Inner and Outer regions of Saginaw Bay, respectively.
The characters of DR in Saginaw Bay were studied also in this paper. The DR were influenced by the interactions between the Saginaw River as a main pollution source and the Lake Huron as a reservoir of high quality water. The impacts of zebra mussels (Dreissena Polymorpha) on denitrification in Saginaw Bay, Lake Huron, were discussed, Significant differences in NH4+ exchange fluxes were detected in the inner and outer bays. The molar ratios of N2:TIN were similar at both sampling sites. Measured DR were positively correlated to O2 consumption rates in the headspace. Additionally, a negative correlation between NH4+ and NO3- concentrations in the overlying water was found. |
| 关键词: Denitrification rate Saginaw Bay Zebra mussels |
| DOI：10.18307/1998.sup31 |
| 分类号: |
| 基金项目: |
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| The Measurement and Character of Sediment Denitrification Rates in Saginaw Bay, Lake Huron |
|
YANG Longyuan1, Wayne S. Gardner2
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|
1.Nanjing Institute of Geography and Limnology, CAS, Nanjing, 210008, China;2.National Oceanic and Atmospheric Administration, Great Lakes Environmental Research Laboratory USA(Present address:The University of Texas at Austin Marine science Institute 750 Chennalview Drive Port Aransas, Texas 78373, USA
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| Abstract: |
It have been measured the denitrification rates (DR) of sediment in Saginaw Bay, Lake Huron, by N2 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 are 48.81 -24.99 and 32.81-40.51 micromol N2 -2h-1 in the Inner and Outer regions of Saginaw Bay, respectively.
The characters of DR in Saginaw Bay were studied also in this paper. The DR were influenced by the interactions between the Saginaw River as a main pollution source and the Lake Huron as a reservoir of high quality water. The impacts of zebra mussels (Dreissena Polymorpha) on denitrification in Saginaw Bay, Lake Huron, were discussed, Significant differences in NH4+ exchange fluxes were detected in the inner and outer bays. The molar ratios of N2:TIN were similar at both sampling sites. Measured DR were positively correlated to O2 consumption rates in the headspace. Additionally, a negative correlation between NH4+ and NO3- concentrations in the overlying water was found. |
| Key words: Denitrification rate Saginaw Bay Zebra mussels |
