Magnetotaxis
orienting and coordinating movement in response to Earth's magnetic field
Magnetotaxis is a process implemented by a diverse group of Gram-negative bacteria that involves orienting and coordinating movement in response to Earth's magnetic field. This process is mainly carried out by microaerophilic and anaerobic bacteria found in aquatic environments such as salt marshes, seawater, and freshwater lakes. By sensing the magnetic field, the bacteria are able to orient themselves towards environments with more favorable oxygen concentrations. This orientation towards more favorable oxygen concentrations allows the bacteria to reach these environments faster as opposed to random movement through Brownian motion.
Overview
Magnetic bacteria (e.g. Magnetospirillum magnetotacticum) contain internal structures known as magnetosomes which are responsible for the process of magnetotaxis. After orienting to the magnetic field using the magnetosomes, the bacteria use flagella to swim along the magnetic field, towards the more favorable environment. Magnetotaxis has no impact on the average speed of the bacteria. However, magnetotaxis allows bacteria to guide their otherwise random movement. This process is similar in practice to aerotaxis, but governed by magnetic fields instead of oxygen concentrations.
The public source identifies “Magnetotaxis” as orienting and coordinating movement in response to Earth's magnetic field. This brief keeps that definition visible, then builds a research path around Magnetotaxis, orienting and coordinating.
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Contemporary correspondence, administrative files and participant testimony can test how later narratives organized the event or institution. The source revision retrieved here is dated Sep 3, 2026. The linked authority identifier is Q615904. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Magnetotaxis” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.