DOI: 10.1007/s10533-014-0066-z
Scopus记录号: 2-s2.0-84925488273
论文题名: Molecular and geochemical constraints on anaerobic ammonium oxidation (anammox) in a riparian zone of the Seine Estuary (France)
作者: Naeher S. ; Huguet A. ; Roose-Amsaleg C.L. ; Laverman A.M. ; Fosse C. ; Lehmann M.F. ; Derenne S. ; Zopfi J.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 123, 期: 2018-01-02 起始页码: 237
结束页码: 250
语种: 英语
英文关键词: 15N labelling
; 16S rRNA and hzo genes
; Anammox
; Denitrification
; Ladderane
; Riparian zone
英文摘要: To expand the limited knowledge about the ecological significance of anaerobic ammonium oxidation (anammox) in continental aquatic and terrestrial ecosystems, we studied community structure, abundance, and activity of anammox bacteria in soils and sediments in the wetland of Trou Deshayes, a riparian zone in the Seine Estuary, France. Combining (i) molecular analyses of the genes coding for anammox bacterial 16S rRNA and the enzyme hydrazine oxidoreductase (hzo), (ii) quantification of unique anammox bacterial membrane lipids (i.e. ladderanes), and, (iii) 15N-isotope label incubation experiments with intertidal sediments and irregularly flooded soils nearby, we demonstrated that anammox bacteria were ubiquitous in the studied wetland ecosystem. In both soils and sediments, detected anammox bacteria were related to Candidatus ‘Brocadia’. 16S rRNA genes were generally lower in the more oxygenated soils, but on the same order of magnitude (107–108 copies g−1 d.w.) as found for other river estuaries, riparian zones and agricultural soils. While the C20-ladderane fatty acid with five cyclobutane moieties (C20-[5]-FA) was found in both sediments and soils, other ladderane species were detected only in the wetland sediments. The observed differential ladderane distribution suggests intra-genus differences in the community composition of anammox bacteria between the sediments and the floodplain soils. While the abundance of anammox bacteria was significantly lower in the soils versus the sediments, the potential anammox rates were similar (≤15 and ≤22 nmol N2 d−1 g−1 w.w. sediment and soil, respectively), suggesting lower cell-specific anammox rates in the sediments. The observed potential rates of anammox were rather low, leaving canonical denitrification as the main fixed N removal pathway in this riparian zone. The relative contribution of anammox to the total N2 production (between 3 and 8 %) was similar at all sites, highlighting the dependence of the anammox process on nitrite supply from denitrification across environmental boundaries. Due to this coupling, the dependence of organotrophic denitrification on the quality and stoichiometry of OM also seems to affect the anammox bacterial community. Our results suggest that N removal and mitigation of N supply from agriculture in wetlands by anammox is limited, and much less important than denitrification. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83572
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: Sorbonne Universités, UPMC Univ Paris 06, UMR 7619, METIS, 4 place Jussieu, Paris, France; CNRS, UMR 7619, METIS, 4 place Jussieu, Paris, France; PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris, Paris, France; Laboratory for Aquatic and Stable Isotope Biogeochemistry, University of Basel, Bernoullistrasse 30, Basel, Switzerland; Department of Chemistry, WA-Organic and Isotope Geochemistry Centre (WA-OIGC), Curtin University, GPO Box U1987, Perth, WA, Australia; Université de Rennes, Campus Beaulieu, 263 avenue du Général Leclerc, Rennes, France
Recommended Citation:
Naeher S.,Huguet A.,Roose-Amsaleg C.L.,et al. Molecular and geochemical constraints on anaerobic ammonium oxidation (anammox) in a riparian zone of the Seine Estuary (France)[J]. Biogeochemistry,2015-01-01,123(2018-01-02)