Postprint version. Published in Biology Monographs: Magnetoreception and Magnetosomes in Bacteria, Volume 3, January 1, 2007, pages 1-24. Copyright © 2006 Springer. The original publication is available at http://dx.doi.org/10.1007/7171_2006_036.
Magnetotactic bacteria orient and migrate along geomagnetic field lines. Magneto-aerotaxis increases the efficiency of respiring cells to efficiently find and maintain position at a preferred microaerobic oxygen concentration. Magneto-aerotaxis could also facilitate access to regions of higher nutrient and electron acceptor concentration via periodic excursions above and below the preferred oxygen concentration level.