Effects of Periodic Alternation of Drying and Rewetting on Nitrate, Nitrite and Hydroxylamine Reductase Activities In Sediments in a Typical Coastal Wetland,Chongming East Intertidal Flat

摘要：

　　The coastal wetland,a typical transitional zone between land and ocean,is a complex and sensitive ecosystem with special ecological and environmental values.The ecosystem is physically characterized by periodic alternation of drying and rewetting under the influences of a spring tide (Approximately twice a month) and a semi-diurnal tide (two almost equal high tides and two low tides in a lunar day).This substantially complicates nitrogen transformation in sediments.Denitrification and ammonification,two key pathways of nitrate reduction,which are closely involved in nitrous oxide emissions and potential water quality,would be strongly affected by the drying and rewetting processes.Nitrate reductase (Nar),nitrite reductase (Nir) and hydroxylamine reductase (Hyr) catalyzes the reduction of nitrate,nitrite and hydroxylamine in sediments under anaerobic conditions,respectively,mediating the pathways of denitrification and ammonification.There is insufficient investigation about these enzymes.

关键词： Coastal wetlands Drying and rewetting Nitrate reductase Nitrite reductase Hydroxylamine reductase

作者: Dou Longshuai Han Jiangang Zhu Yongli Li Pingping

作者单位: School of the Environment,Jiangsu University,Zhenjiang 212013,China College of Forest Resources and Environment,Nanjing Forestry University,Nanjing 210037,China

会议类型: 国际会议

会议名称: 3rd International Conference on Pollution Ecology(第三届污染生态学国际会议(3rd ICPE))

会议地点: 天津

会议语种:英文

页码: 69-70

在线出版日期: 2012-11-06（万方平台首次上网日期，不代表论文的发表时间）