Biomass Yield Efficiency of the Marine Anammox Bacterium, “Candidatus Scalindua sp.,” is Affected by Salinity

Awata Takanori

Kindaichi Tomonori

Ozaki Noriatsu

Ohashi Akiyoshi

Microbes and environments

The growth rate and biomass yield efficiency of anaerobic ammonium oxidation (anammox) bacteria are markedly lower than those of most other autotrophic bacteria. Among the anammox bacterial genera, the growth rate and biomass yield of the marine anammox bacterium “Candidatus Scalindua sp.” is still lower than those of other anammox bacteria enriched from freshwater environments. The activity and growth of marine anammox bacteria are generally considered to be affected by the presence of salinity and organic compounds. Therefore, in the present study, the effects of salinity and volatile fatty acids (VFAs) on the anammox activity, inorganic carbon uptake, and biomass yield efficiency of “Ca. Scalindua sp.” enriched from the marine sediments of Hiroshima Bay, Japan, were investigated in batch experiments. Differences in VFA concentrations (0–10 mM) were observed under varying salinities (0.5%–4%). Anammox activity was high at 0.5%–3.5% salinity, but was 30% lower at 4% salinity. In addition, carbon uptake was higher at 1.5%–3.5% salinity. The results of the present study clearly demonstrated that the biomass yield efficiency of the marine anammox bacterium “Ca. Scalindua sp.” was significantly affected by salinity. On the other hand, the presence of VFAs up to 10 mM did not affect anammox activity, carbon uptake, or biomass yield efficiency.

anaerobic ammonium oxidation (anammox)

“Candidatus Scalindua”

biomass yield efficiency

salinity

volatile fatty acids

Construction. Civil engineering [ 510 ]

eng

Japanese Society of Microbical Ecology

本文データは学協会の許諾に基づきCiNiiから複製したものである

[ISSN] 1342-6311

[NCID] AA11173196

[DOI] 10.1264/jsme2.ME14088

[NAID] 130005061716 isVersionOf

[DOI] http://doi.org/10.1264/jsme2.ME14088 isVersionOf