scholarly journals Characterisation of an atypical manifestation of black band disease onPorites luteain the Western Indian Ocean

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2073 ◽  
Author(s):  
Mathieu Séré ◽  
David A. Wilkinson ◽  
Michael H. Schleyer ◽  
Pascale Chabanet ◽  
Jean-Pascal Quod ◽  
...  
Keyword(s):  
Coral Reefs ◽  
Microscopic Analysis ◽  
Western Indian Ocean ◽  
Black Band Disease ◽  
Porites Lutea ◽  
Black Band ◽  
Bacterial Aggregates ◽  
High Level ◽  
Atypical Manifestation

Recent surveys conducted on Reunion Island coral reefs revealed an atypical manifestation of black band disease on the main framework building coral, Porites lutea. This BBD manifestation (PorBBD) presented a thick lighter-colored band, which preceded the typical BBD lesion. Whilst BBD aetiology has been intensively described worldwide, it remains unclear if corals with apparently similar lesions across coral reefs are affected by the same pathogens. Therefore, a multidisciplinary approach involving field surveys, gross lesion monitoring, histopathology and 454-pyrosequencing was employed to provide the first comprehensive characterization of this particular manifestation. Surveys conducted within two geomorphological zones over two consecutive summers and winters showed spatial and seasonal patterns consistent with those found for typical BBD. Genetic analyses suggested an uncharacteristically high level of Vibrio spp. bacterial infection within PorBBD. However, microscopic analysis revealed high densities of cyanobacteria, penetrating the compromised tissue as well as the presence of basophilic bodies resembling bacterial aggregates in the living tissue, adjacent to the bacterial mat. Additionally, classical BBD-associated cyanobacterial strains, genetically related to Pseudoscillatoria coralii and Roseofilum reptotaenium were identified and isolated and the presence of sulfate-reducers or sulfide-oxidizers such as Desulfovibrio and Arcobacter, previously shown to be associated with anoxic microenvironment within typical BBD was also observed, confirming that PorBBD is a manifestation of classical BBD.

scholarly journals Ecological and molecular characterization of a coral black band disease outbreak in the Red Sea during a bleaching event

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5169 ◽  
Author(s):  
Ghaida Hadaidi ◽  
Maren Ziegler ◽  
Amanda Shore-Maggio ◽  
Thor Jensen ◽  
Greta Aeby ◽  
...  
Keyword(s):  
Microbial Community ◽  
Red Sea ◽  
Microbial Mats ◽  
Heterotrophic Bacteria ◽  
Coral Disease ◽  
Differential Susceptibility ◽  
Black Band Disease ◽  
Southern Central ◽  
Black Band

Black Band Disease (BBD) is a widely distributed and destructive coral disease that has been studied on a global scale, but baseline data on coral diseases is missing from many areas of the Arabian Seas. Here we report on the broad distribution and prevalence of BBD in the Red Sea in addition to documenting a bleaching-associated outbreak of BBD with subsequent microbial community characterization of BBD microbial mats at this reef site in the southern central Red Sea. Coral colonies with BBD were found at roughly a third of our 22 survey sites with an overall prevalence of 0.04%. Nine coral genera were infected including Astreopora, Coelastrea, Dipsastraea, Gardineroseris, Goniopora, Montipora, Pavona, Platygyra, and Psammocora. For a southern central Red Sea outbreak site, overall prevalence was 40 times higher than baseline (1.7%). Differential susceptibility to BBD was apparent among coral genera with Dipsastraea (prevalence 6.1%), having more diseased colonies than was expected based on its abundance within transects. Analysis of the microbial community associated with the BBD mat showed that it is dominated by a consortium of cyanobacteria and heterotrophic bacteria. We detected the three main indicators for BBD (filamentous cyanobacteria, sulfate-reducing bacteria (SRB), and sulfide-oxidizing bacteria (SOB)), with high similarity to BBD-associated microbes found worldwide. More specifically, the microbial consortium of BBD-diseased coral colonies in the Red Sea consisted of Oscillatoria sp. (cyanobacteria), Desulfovibrio sp. (SRB), and Arcobacter sp. (SOB). Given the similarity of associated bacteria worldwide, our data suggest that BBD represents a global coral disease with predictable etiology. Furthermore, we provide a baseline assessment of BBD disease prevalence in the Red Sea, a still understudied region.

Characterization of the bacterial consortium associated with black band disease in coral using molecular microbiological techniques

2002 ◽  
Vol 4 (7) ◽  
pp. 401-413 ◽  
Author(s):  
Rory P. Cooney ◽  
Olga Pantos ◽  
Martin D. A. Le Tissier ◽  
Michael R. Barer ◽  
Anthony G. O'Donnell ◽  
...  
Keyword(s):  
Bacterial Consortium ◽  
Black Band Disease ◽  
Microbiological Techniques ◽  
Black Band

Characterization of black band disease in Red Sea stony corals

2007 ◽  
Vol 9 (8) ◽  
pp. 1995-2006 ◽  
Author(s):  
Orit Barneah ◽  
Eitan Ben-Dov ◽  
Esti Kramarsky-Winter ◽  
Ariel Kushmaro
Keyword(s):  
Red Sea ◽  
Black Band Disease ◽  
Stony Corals ◽  
Black Band
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