Effect of ciliates on nitrification and nitrifying bacteria in Baltic Sea sediments

Prast, M., Bischof, Adrian A., Waller, Uwe, Amann, R. and Berninger, U.-G. (2007) Effect of ciliates on nitrification and nitrifying bacteria in Baltic Sea sediments Marine Ecology Progress Series, 350 . pp. 55-61. DOI 10.3354/meps07143.

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Abstract

Nitrification in aquatic sediments is catalyzed by bacteria. While many autecological studies on these bacteria have been published, few have regarded them as part of the benthic microbial food web. Ciliates are important as grazers on bacteria, but also for remineralization of organic matter. We tested the hypothesis that ciliates can affect nitrification. Experiments with Baltic Sea sediments in laboratory flumes, with or without the addition of cultured ciliates, were conducted. We found indication of a higher nitrification potential (ammonium oxidation) in one experiment and increased abundances of nitrifying bacteria in treatments with ciliates. This is likely due to higher nitrogen availability caused by excretion by ciliates and enhanced transport processes in the sediment.

Document Type: Article
Keywords: Microbiology; Nitrifying bacteria; Ciliates; Nitrification; Bacteria; Sediment; FISH; Nitrification slurry assay
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Evolutionary Ecology of Marine Fishes
Refereed: Yes
DOI etc.: 10.3354/meps07143
ISSN: 0171-8630
Date Deposited: 03 Dec 2008 16:51
Last Modified: 10 Mar 2014 09:45
URI: http://eprints.uni-kiel.de/id/eprint/5107

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