DOI: 10.1007/s10533-018-0419-0
Scopus记录号: 2-s2.0-85040631556
论文题名: Denitrification under lake ice
作者: Cavaliere E. ; Baulch H.M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 137, 期: 3 起始页码: 285
结束页码: 295
语种: 英语
英文关键词: Denitrification
; Ice cover
; Lake
; Nitrate
; Nitrous oxide
; Temperature
英文摘要: Many lakes, ponds and reservoirs are subject to long and changing periods of ice cover. However, limited winter research has created key knowledge gaps. How does nitrogen cycling change under ice? And what does changing ice cover duration mean for water quality? Here we present the first measurements of denitrification rates under ice in temperate, polymictic waterbodies. Surprisingly, despite lower winter temperatures, winter and summer rates of denitrification did not differ. Experimental work suggests that denitrification rates are controlled hierarchically, first by nitrate concentrations, then by temperature. As a result, controls on nitrate inputs such as changing hydrology and nitrification, combined with physical controls on delivery of nitrate to sediments, may be more important to nitrate retention via denitrification than the duration of low temperature or ice cover. Nitrous oxide was typically supersaturated under-ice, suggesting an ice-out flux will occur, and this flux may be greatest in systems with elevated nitrate. © 2018, Springer International Publishing AG, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83186
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of Environment and Sustainability, Global Institute for Water Security, University of Saskatchewan, 11 Innovation Boulevard, Saskatoon, SK, Canada
Recommended Citation:
Cavaliere E.,Baulch H.M.. Denitrification under lake ice[J]. Biogeochemistry,2018-01-01,137(3)