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A novel, mat-forming Thiomargarita population associated with a sulfidic fluid flow from a deep-sea mud volcano

Record type: Article

A mat-forming population of the giant sulfur bacterium Thiomargarita was discovered at the flank of the mud volcano Amon on the Nile Deep Sea Fan in the Eastern Mediterranean Sea. All cells were of a spherical and vacuolated phenotype and internally stored globules of elemental sulfur. With a diameter of 24–65 µm, Thiomargarita cells from the Eastern Mediterranean were substantially smaller than cells of previously described populations. A 16S rRNA gene fragment was amplified and could be assigned to the Thiomargarita-resembling cells by fluorescence in situ hybridization. This sequence is monophyletic with published Thiomargarita sequences but sequence similarities are only about 94%, indicating a distinct diversification. In the investigated habitat, highly dynamic conditions favour Thiomargarita species over other sulfur-oxidizing bacteria. In contrast to Thiomargarita namibiensis populations, which rely on periodic resuspension from sulfidic sediment into the oxygenated water column, Thiomargarita cells at the Amon mud volcano seem to remain stationary at the sediment surface while environmental conditions change around them due to periodic brine flow.

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Citation

Girnth, Anne-Christin, Grünke, Stefanie, Lichtschlag, Anna, Felden, Janine, Knittel, Katrin, Wenzhöfer, Frank, de Beer, Dirk and Boetius, Antje (2011) A novel, mat-forming Thiomargarita population associated with a sulfidic fluid flow from a deep-sea mud volcano Environmental Microbiology, 13, (2), pp. 495-505. (doi:10.1111/j.1462-2920.2010.02353.x).

More information

Published date: February 2011
Organisations: Marine Geoscience

Identifiers

Local EPrints ID: 342674
URI: http://eprints.soton.ac.uk/id/eprint/342674
ISSN: 1462-2920
PURE UUID: 97d2883e-7b8f-4454-9824-2f9df0d364ad

Catalogue record

Date deposited: 12 Sep 2012 10:37
Last modified: 18 Jul 2017 05:27

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Contributors

Author: Anne-Christin Girnth
Author: Stefanie Grünke
Author: Anna Lichtschlag
Author: Janine Felden
Author: Katrin Knittel
Author: Frank Wenzhöfer
Author: Dirk de Beer
Author: Antje Boetius

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