Magnetotactic Bacteria at the Geomagnetic Equator

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Science  12 Jun 1981:
Vol. 212, Issue 4500, pp. 1269-1270
DOI: 10.1126/science.212.4500.1269


Magnetotactic bacteria are present in fresh water and marine sediments of Fortaleza, Brazil, situated close to the geomagnetic equator. Both South-seeking and North-seeking bacteria are present in roughly equal numbers in the same samples. This observation is consistent with the hypothesis that the vertical component of the geomagnetic field selects the predominant polarity type among magnetotactic bacteria in natural environments.