Articles | Volume 12, issue 18
https://doi.org/10.5194/bg-12-5277-2015
https://doi.org/10.5194/bg-12-5277-2015
Research article
 | 
16 Sep 2015
Research article |  | 16 Sep 2015

Iron encrustations on filamentous algae colonized by Gallionella-related bacteria in a metal-polluted freshwater stream

J. F. Mori, T. R. Neu, S. Lu, M. Händel, K. U. Totsche, and K. Küsel

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Short summary
We studied filamentous macroscopic algae growing in metal-rich stream water that leaked from a former uranium-mining district. These algae were encrusted with Fe-deposits that were associated with microbes, mainly Gallionella-related Fe-oxidizing bacteria, and extracellular polymeric substances. Algae with a lower number of chloroplasts often exhibited discontinuous series of precipitates, likely due to the intercalary growth of algae which allowed them to avoid detrimental encrustation.
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