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题名: High ammonium loading can increase alkaline phosphatase activity and promote sediment phosphorus release: A two-month mesocosm experiment
作者: Ma, Shuo Nan1, 2; Wang, Hai Jun1; Wang, Hong Zhu1; Li, Yan1, 2; Liu, Miao1, 2; Liang, Xiao Min1; Yu, Qing1, 2; Jeppesen, Erik3, 4, 5; Sondergaard, Martin3, 4, 5
关键词: Sediment phosphorus release ; Ammonium loading ; Alkaline phosphatase activity ; Dissolved oxygen
刊名: WATER RESEARCH
发表日期: 2018-11-15
DOI: 10.1016/j.watres.2018.08.043
卷: 145, 页:388-397
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]: Engineering, Environmental ; Environmental Sciences ; Water Resources
研究领域[WOS]: Engineering ; Environmental Sciences & Ecology ; Water Resources
英文摘要: In aquatic ecosystems, ammonium is one of the dominant substances in the effluent discharge from wastewater treatment plants and its impact has been widely explored as it is thought, in its toxic form (NH3), to cause stress on organisms. Little is, however, known about its potential effect on the release of phosphorus (P) from the sediment. In a two-month mesocosm (150 L) experiment, we tested if high loading of ammonium promotes sediment P release and investigated the dominant underlying mechanisms. A gradient of five target ammonium loading levels was used by adding NH4CI fertilizer: no addition/control (N0), 3 (N1), 5 (N2), 10 (N3), and 21 (N4) mg NH4Cl L-1 (NH4CI expressed as nitrogen). We found that: 1) significant sediment P release for N3 and N4 but minor release or retention for NO, N1, and N2 were detected both by the total phosphorus concentration (TP) in the overlying water and in situ measurements of diffusive gradients in thin-films (DGT) at the sediment-water interface; 2) overall, TP correlated significantly and positively with total nitrogen (TN) concentrations in the water. Further correlation and path analyses suggested that stimulated alkaline phosphatase activity (APA) was likely the dominant mechanisms behind the ammonium-induced sediment P release and decreased dissolved oxygen (DO) levels (an approximate reduction from 9.2 to 6.6 mg O2 L-1) was likely a contributing factor, particularly in the beginning of the experiment. (C) 2018 Elsevier Ltd. All rights reserved.
关键词[WOS]: LAKE-SEDIMENTS ; EUTROPHIC LAKE ; GLOBAL ASSESSMENT ; DISSOLVED-OXYGEN ; WATER INTERFACE ; SHALLOW LAKES ; NITROGEN ; PHYTOPLANKTON ; TAIHU ; CHINA
语种: 英语
项目资助者: State Key Laboratory of Freshwater Ecology and Biotechnology(2011FBZ14 ; Science and Technology Support Program of Hubei Province(2015BBA225) ; Youth Innovation Association of Chinese Academy of Sciences(2014312) ; PROGNOS (Predicting in-lake responses to change using near real time models -Water Joint Programme Initiative) ; AQUACOSM (Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains) ; AnaEE Denmark ; Centre for Water Technology ; 2014FB14 ; 2016FBZ09)
WOS记录号: WOS:000449137700037
ISSN号: 0043-1354
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/56082
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100000, Peoples R China
3.Aarhus Univ, Dept Biosci, DK-8600 Silkeborg, Denmark
4.Aarhus Univ, Arctic Res Ctr, DK-8600 Silkeborg, Denmark
5.Sinodanish Ctr Educ & Res, Beijing 100049, Peoples R China
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