DOI: 10.1007/s10533-017-0297-x
Scopus记录号: 2-s2.0-85011898472
论文题名: Potential roles of anaerobic ammonium oxidation (anammox) in overlying water of rivers with suspended sediments
作者: Zhang S. ; Xia X. ; Liu T. ; Xia L. ; Zhang L. ; Jia Z. ; Li Y.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 132, 期: 3 起始页码: 237
结束页码: 249
语种: 英语
英文关键词: Anammox
; Freshwater
; Nitrogen loss
; Oxic–anoxic interface
; Suspended sediment
Scopus关键词: abundance estimation
; ammonium compound
; anoxic conditions
; bacterium
; fluvial deposit
; freshwater
; inorganic nitrogen
; microbial activity
; nitrogen fixation
; oxic conditions
; oxidation
; river water
; sediment chemistry
; suspended sediment
; China
; Yellow River
; Candidatus Scalindua
英文摘要: Anaerobic ammonium oxidation (anammox) is believed to be an important sink for fixed inorganic nitrogen in terrestrial and aquatic ecosystems, and many studies have reported that macroscale oxic–anoxic interfaces, such as riparian zones, were hotspots of anammox reaction. However, no research has linked microscale interfaces with the anammox process in natural environments. This study provides evidence for the presence of anammox bacteria and potential anammox activity on the suspended sediment (SPS) in the oxic water of the Yellow River. The anammox bacteria in the overlying water were mainly attached to SPS. The abundance of anammox bacteria in the overlying water was positively correlated with SPS concentration (R2 = 0.97, P < 0.01), with abundance ranging from 9.5 × 102 to 1.5 × 104 hydrazine synthase gene copies per g of SPS. Phylogenic analysis of anammox bacteria revealed that the SPS phase was dominated by Candidatus Brocadia. Candidatus Scalindua genera was detected in this study with a conductivity of 1100 μS cm−1. Moreover, 15NH4+-amended anaerobic incubation of the overlying water showed that the average potential anammox activity was 0.076 nmol-N L−1 day−1. The 15N labeling simulation experiments demonstrated the occurrence of anammox in the oxic water of the Yellow River. This study suggests that the anammox process at the SPS–water interface might be a non-negligible pathway for the loss of fixed nitrogen in natural freshwaters, but this remains to be determined in further studies. © 2017, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83303
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, Beijing Normal University/State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing, China
Recommended Citation:
Zhang S.,Xia X.,Liu T.,et al. Potential roles of anaerobic ammonium oxidation (anammox) in overlying water of rivers with suspended sediments[J]. Biogeochemistry,2017-01-01,132(3)