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Shifts in the dominant populations of ammonia-oxidizing ß-subclass proteobacteria along the eutrophic Schelde estuary
de Bie, M.J.M.; Speksnijder, A.G.C.L.; Kowalchuk, G.A.; Schuurman, T.; Zwart, G.; Stephen, J.R.; Diekmann, O.E.; Laanbroek, H.J. (2001). Shifts in the dominant populations of ammonia-oxidizing ß-subclass proteobacteria along the eutrophic Schelde estuary. Aquat. Microb. Ecol. 23: 225-236
In: Aquatic Microbial Ecology. Inter-Research: Oldendorf/Luhe. ISSN 0948-3055, more
Peer reviewed article  

Available in Authors 
    VLIZ: Open Repository 114129 [ OMA ]

Keywords
    Ammonia; Bacteria; Estuaries; Oxidation; Nitrosomonas Winogradsky, 1892 [WoRMS]; Marine; Brackish water

Authors  Top 
  • de Bie, M.J.M., more
  • Speksnijder, A.G.C.L.
  • Kowalchuk, G.A.
  • Schuurman, T.
  • Zwart, G.
  • Stephen, J.R.
  • Diekmann, O.E.
  • Laanbroek, H.J., more

Abstract
    The community structure of ammonia-oxidizing bacteria of the β-subclass Proteobacteria was investigated with respect to environmental gradients along the Schelde, a eutrophic estuary system. A dominance of Nitrosomonas-like sequences was detected using molecular techniques targeting the 16S rRNA gene on 3 separate sampling dates, and different Nitrosomonas-like populations were most dominant at different locations along the estuary. The most frequently detected ammonia oxidizer-like sequences in the freshwater part of the estuary were associated with a sequence cluster previously designated as NitrosomonasNitrosomonas-like sequences. -like sequences represented only a small minority of those detected for all samples. The shift in dominant ammonia-oxidizer populations occurred in the estuarine region with the sharpest observed gradients in salinity, oxygen, and ammonia. These results provide evidence in support of the differential selection of physiologically distinct Nitrosomonas-like groups according to the environmental gradients encountered along the estuary

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