Comparative analysis of nitrifying bacteria associated with freshwater and marine aquaria

Article Abstract:

Oligonucleotide probe survey of ammonia-oxidizing nitrifiers in seawater aquarium biofilters demonstrates the need for different bacteria for ammonia-oxidation in freshwater aquaria and seawater aquaria. Analysis of nitrifying bacterial phylotypes associated with the water samples reveals high levels of ammonia-oxidizing bacteria, Nitrosomonas europaea, in seawater aquaria. However, the chemolithotrophic ammonia oxidation in the freshwater aquaria shows no sign of Nitrosomonas. Both the aquaria are characterized by the absence of rRNA from nitrite-oxidizing proteobacteria.

Usage, Nucleic acid probes, Marine bacteria

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Nitrospira-like bacteria associated with nitrite oxidation in freshwater aquaria

Article Abstract:

A study was conducted to evaluate the role played by Nitrospira-like species on the oxidation of nitrite to nitrate in freshwater aquaria. Nucleic acid hybridization, time series analysis, and oligonucleotide probes were employed to to sample the influence of the Nitrospira- and Nitrobacter-like species. Results revealed that bacteria related to Nitrospira moscoviensis and Nitrospira marina were the mediators in nitrite oxidation in freshwaters rather than Nitrobacter winogradskyi.

Environmental aspects, Freshwater ecology, Nitrification

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Identification of bacteria responsible for ammonia oxidation in freshwater aquaria

Article Abstract:

Bacteria from the beta subdivision of the Proteobacteria are responsible for oxidizing ammonia in some freshwater aquaria. Researchers found four major strains: Nitrosomonas marina, Nitrosospira, Nitrosomonas europaea, and Nitrosococcus mobilis. The concentration of ammonia determined which strain predominated.

Aquariums, Aquariums (Tanks)

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