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Applied and Environmental Microbiology, May 2008, p. 3274-3278, Vol. 74, No. 10
0099-2240/08/$08.00+0     doi:10.1128/AEM.01870-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Microbes Enriched in Seawater after Addition of Coral Mucus{triangledown} ,{dagger}

Elke Allers,1 Christina Niesner,1 Christian Wild,1,2 and Jakob Pernthaler1,3*

Max Planck Institute for Marine Microbiology, Bremen, Germany,1 Coral Reef Ecology Working Group, GeoBio Center, Ludwig Maximilians University, Munich, Germany,2 Limnological Station Kilchberg, University of Zurich, Kilchberg, Switzerland3

Received 13 August 2007/ Accepted 6 March 2008

We investigated which microbial taxa in coastal Red Sea water were stimulated by addition of mucus from the coral Fungia sp. Decreases in the concentration and C/N ratio of particulate organic material during short-term incubations (50 h) were paralleled by a steep rise in the number of Gammaproteobacteria, particularly Alteromonadaceae, followed by Vibrionaceae. Two almost identical genotypes affiliated with Alteromonas macleodii accounted for up to >85% of all Alteromonadaceae (45% of the total cells) in the mucus-amended enrichments but were rare in unamended control incubations and in ambient seawater. A. macleodii-like bacteria might thus be important in the transfer of organic carbon from coral mucus to the pelagic microbial food webs of coral reefs.

* Corresponding author. Mailing address: Limnological Station Kilchberg, University of Zurich, Kilchberg, Switzerland. Phone: (41) 44 716 1210. Fax: (41) 44 716 1225. E-mail: Pernthaler{at}limnol.uzh.ch

{triangledown} Published ahead of print on 14 March 2008.

{dagger} Supplemental material for this article may be found at http://aem.asm.org/.

Applied and Environmental Microbiology, May 2008, p. 3274-3278, Vol. 74, No. 10
0099-2240/08/$08.00+0     doi:10.1128/AEM.01870-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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