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Vieira C., Engelen A. H., Guentas L., Aires T., Houlbrèque Fanny, Gaubert J., Serrao E. A., De Clerck O., Payri Claude. (2016). Species specificity of bacteria associated to the brown seaweeds Lobophora (Dictyotales, Phaeophyceae) and their potential for induction of rapid coral bleaching in Acropora muricata. Frontiers in Microbiology, 7, art. 316 [13 p.]. ISSN 1664-302X

Fichier PDF disponible http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers16-04/010066699.pdf

Lien direct chez l'éditeur doi:10.3389/fmicb.2016.00316

Titre
Species specificity of bacteria associated to the brown seaweeds Lobophora (Dictyotales, Phaeophyceae) and their potential for induction of rapid coral bleaching in Acropora muricata
Année de publication2016
Type de documentArticle référencé dans le Web of Science WOS:000372491100001
AuteursVieira C., Engelen A. H., Guentas L., Aires T., Houlbrèque Fanny, Gaubert J., Serrao E. A., De Clerck O., Payri Claude.
SourceFrontiers in Microbiology, 2016, 7, p. art. 316 [13 p.]. p. art. 316 [13 p.] ISSN 1664-302X
RésuméWhile reef degradation is occurring worldwide, it is not uncommon to see phase shifts from coral to macroalgal dominated reefs. Numerous studies have addressed the mechanisms by which macroalgae may outcompete corals and a few recent studies highlighted the putative role of bacteria at the interface between macroalgae and corals. Some studies suggest that macroalgae may act as vectors and/or foster proliferation of microorganisms pathogenic for corals. Using a combination of high throughput sequencing, bacterial culturing, and in situ bioassays we question if the adversity of macroalgal associated bacteria to corals is mediated by specific bacterial taxa. Using Illumina sequencing, we characterized and compared the bacterial community from two Lobophora (Dictyotales, Phaeophyceae) species. The two species presented distinctive bacterial communities. Both species shared approximately half of their OTUs, mainly the most abundant bacteria. Species-specific OTUs belong to Planctomycetes, Proteobacteria, and Bacteroidetes. In total, 16 culturable bacterial strain were isolated and identified from the Lobophora surface, consisting of 10 genera (from nine families, four classes, and three phyla), some of which are not known as, but are related to pathogens involved in coral diseases, and others are naturally associated to corals. When patches of marine agar with 24 h cultures of each of these bacteria were placed in direct contact with the branches of the scleractinian coral Acropora muricata, they caused severe bleaching after 24 h exposure. Results suggest that regardless of taxonomic affinities, increase in density of these bacteria can be adverse to corals. Nevertheless, the microbial community associated to macroalgal surface may not represent a threat to corals, because the specific bacterial screening and control exerted by the alga preventing specific bacterial proliferation.
Plan de classementEcologie, systèmes aquatiques [036]
Descr. géo.NOUVELLE CALEDONIE ; NOUMEA LAGON
LocalisationFonds IRD [F B010066699]
Identifiant IRDfdi:010066699
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010066699

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