Magnetotactic bacteria at the geomagnetic equator.
نویسندگان
چکیده
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.
منابع مشابه
Magnetic polarity fractions in magnetotactic bacterial populations near the geomagnetic equator.
The relative numbers of North-seeking and South-seeking polarity types in natural populations of magnetotactic bacteria were determined at sites on the coast of Brazil. These sites were South of the geomagnetic equator and had upward geomagnetic inclinations of 1-12 degrees . For upward inclinations >6 degrees , South-seeking cells predominated over North-seeking cells by more than a factor of ...
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ورودعنوان ژورنال:
- Science
دوره 212 4500 شماره
صفحات -
تاریخ انتشار 1981