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The ammonia-oxidizing nitrifying population of the River Elbe estuary Stehr, G.; Böttcher, B.; Dittberner, P.; Rath, G.; Koops, H.-P. (1995). The ammonia-oxidizing nitrifying population of the River Elbe estuary. FEMS Microbiol. Ecol. 17(3): 177-186 In: FEMS Microbiology Ecology. Federation of European Microbiological Societies: Amsterdam. ISSN 0168-6496; e-ISSN 1574-6941

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Beschikbaar in	Auteurs
VLIZ: Non-open access 284279 [ aanvragen ]

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Trefwoorden

Acids > Organic compounds > Organic acids > Nucleic acids > DNA Analysis > Microbiological analysis Biology > Physiology > Ecophysiology Chemical compounds > Nitrogen compounds > Ammonia Chemical reactions > Nitrification Chemical reactions > Oxidation Germany, Elbe R. Organisms > Microorganisms > Prokaryotes > Microorganisms > Bacteria > Nitrifying bacteria Phylogenetics Species diversity Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries Nitrosomonas Winogradsky, 1892 [WoRMS] Elbe [Marine Regions] Zoet water

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Auteurs		Top
Stehr, G. Böttcher, B. Dittberner, P.	Rath, G. Koops, H.-P.

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Abstract

The ammonia-oxidizing bacterial population of the tidal River Elbe was analysed. In the freshwater section of the river, abundance was generally at a magnitude of 104 cells per g dry weight and 103 cells per ml in sediments and in water samples, respectively. In the brackish water region, counts decreased drastically with the increase in salinity caused by the low level of abundance of ammonia-oxidizers in the seawater. The contribution of attached ammonia-oxidizers to the total number ranged between 50 and approximately 100%, depending on the respective load with suspended particulate matter (SPM) of the water. The presence of seven distinct species of the genus Nitrosomonas was established by DNA hybridizations. Based on 16S rRNA gene partial sequence analyses, four groups, comprising phylogenetically closely related species, were defined. Dependence of ammonia oxidation on the NH4 Cl concentration, tolerance against increasing salinity and the possession of urease activity were found to be useful ecophysiological characteristics, being in accordance with phylogenetic relationships among the species.

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