Elevated salinity selects for a less diverse ammonia-oxidizing population in aquarium biofilters

Grommena, Roeland, Dauwa, Lenny and Verstraete, Willy (2005) Elevated salinity selects for a less diverse ammonia-oxidizing population in aquarium biofilters. Fems Microbiology Ecology, 52 1: 1-11. doi:10.1016/j.femsec.2004.10.001


Author Grommena, Roeland
Dauwa, Lenny
Verstraete, Willy
Title Elevated salinity selects for a less diverse ammonia-oxidizing population in aquarium biofilters
Journal name Fems Microbiology Ecology   Check publisher's open access policy
ISSN 0168-6496
1574-6941
Publication date 2005-03-01
Year available 2004
Sub-type Article (original research)
DOI 10.1016/j.femsec.2004.10.001
Open Access Status Not Open Access
Volume 52
Issue 1
Start page 1
End page 11
Total pages 11
Place of publication Oxford
Publisher Blackwell
Language eng
Subject 070401 Aquaculture
Abstract The activity and changes in the structure of the community of the ammonia-oxidizing bacteria belonging to the Betaproteobacteria were monitored in freshwater and artificial seawater biofilters for two months after inoculation with a commercial nitrifying consortium. Both in freshwater and artificial seawater, ammonium oxidation proceeded immediately after addition of the inoculum, although initial activity in artificial seawater was lower than in freshwater. Denaturing gradient gel electrophoresis of the ammonia-oxidizing bacterial community of the inoculum and the freshwater and the artificial seawater aquaria as a function of time showed that initially only one dominant ammonia-oxidizer, closely related to Nitrosomonas marina, was detectable in all the systems. The fingerprint of the ammonia-oxidizing bacterial community in the artificial seawater biofilters continued to be dominated by this single band. In the freshwater aquaria, in contrast, the composition of the ammonia-oxidizer community became more diverse after one month, with 4–7 new bands appearing in the denaturing gradient gel fingerprint. Since the inoculum is cultivated at an average salinity of 11 g l−1, it is argued that the elevated salinity selects for a less diverse ammonia-oxidizer community in the inoculum and the artificial seawater aquaria.
Keyword Nitrification
Aquarium
Biofilter
Inoculum
Nitrosomonas
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Advanced Water Management Centre Publications
 
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Created: Tue, 17 Feb 2009, 20:08:29 EST by Judy Dingwall on behalf of Advanced Water Management Centre