scholarly journals Culture and identification of Desulfovibrio spp. from corals infected by black band disease on Dominican and Florida Keys reefs

2006 ◽  
Vol 69 (1) ◽  
pp. 119-127 ◽  
Author(s):  
S Viehman ◽  
DK Mills ◽  
GW Meichel ◽  
LL Richardson
2007 ◽  
Vol 73 (16) ◽  
pp. 5173-5182 ◽  
Author(s):  
Jamie L. Myers ◽  
Raju Sekar ◽  
Laurie L. Richardson

ABSTRACTBlack band disease (BBD) is a pathogenic, sulfide-rich microbial mat dominated by filamentous cyanobacteria that infect corals worldwide. We isolated cyanobacteria from BBD into culture, confirmed their presence in the BBD community by using denaturing gradient gel electrophoresis (DGGE), and demonstrated their ecological significance in terms of physiological sulfide tolerance and photosynthesis-versus-irradiance values. Twenty-nine BBD samples were collected from nine host coral species, four of which have not previously been investigated, from reefs of the Florida Keys, the Bahamas, St. Croix, and the Philippines. From these samples, seven cyanobacteria were isolated into culture. Cloning and sequencing of the 16S rRNA gene using universal primers indicated that four isolates were related to the genusGeitlerinemaand three to the genusLeptolyngbya. DGGE results, obtained usingCyanobacteria-specific 16S rRNA primers, revealed that the most common BBD cyanobacterial sequence, detected in 26 BBD field samples, was related to that of anOscillatoriasp. The next most common sequence, 99% similar to that of theGeitlerinemaBBD isolate, was present in three samples. OneLeptolyngbya- and onePhormidium-related sequence were also found. Laboratory experiments using isolates of BBDGeitlerinemaandLeptolyngbyarevealed that they could carry out sulfide-resistant oxygenic photosynthesis, a relatively rare characteristic among cyanobacteria, and that they are adapted to the sulfide-rich, low-light BBD environment. The presence of the cyanotoxin microcystin in these cultures and in BBD suggests a role in BBD pathogenicity. Our results confirm the presence ofGeitlerinemain the BBD microbial community and its ecological significance, which have been challenged, and provide evidence of a second ecologically significant BBD cyanobacterium,Leptolyngbya.


2014 ◽  
Vol 9 (2) ◽  
pp. 307
Author(s):  
Ofri Johan ◽  
Anang Hari Kristanto ◽  
Joni Haryadi

Keberadaan penyakit karang akan menyebabkan kerusakan komunitas dan populasi karang di Indonesia, sementara informasi prevalensi penyakit tersebut masih sedikit terpublikasikan. Penelitian ini bertujuan untuk mengetahui prevalensi penyakit karang jenis sabuk hitam di Kepulauan Seribu pada enam lokasi di bagian tubir dan 10 lokasi di bagian lereng terumbu yang dilaksanakan pada bulan November 2011. Metode transek sabuk digunakan untuk mendapatkan prevalensi penyakit karang dengan ukuran 1 m ke kiri dan 1 m ke kanan dari garis transek, panjang transek 20 m dan dilakukan tiga ulangan pada setiap lokasi, sehingga total luasan yang teramati adalah 120 m2. Hasil penelitian di bagian tubir berhasil mengamati jumlah koloni sebanyak 4.517, lebih tinggi dibandingkan di lereng terumbu yaitu sebanyak 3.418 koloni. Karang yang dominan ditemukan di lereng terumbu adalah Montipora sp., Acropora sp., dan Porites sp., dengan jumlah koloni berturut-turut yaitu 2.417 koloni, 1.131 koloni, dan 299 koloni, sementara pada lereng terumbu didominasi oleh karang Porites sp., Fungia sp., dan Acropora sp. dengan jumlah koloni berturut-turut yaitu 867 koloni, 596 koloni, dan 496 koloni. Prevalensi penyakit sabuk hitam pada tubir lebih tinggi (12,53%) dibandingkan dengan di lereng terumbu (0,05%), demikian juga dengan faktor penganggu kesehatan karang lebih tinggi di tubir (3,25%) dibandingkan dengan di lereng terumbu (2,68%). Data prevalensi pada penelitian ini merupakan puncak prevalensi (outbreak) dibandingkan dengan data lain yang dilakukan pengamatan selama satu tahun. Prevalensi penyakit sabuk hitam sangat dipengaruhi oleh adanya peningkatan suhu dan intensitas cahaya, sehingga prevalensi di perairan dangkal (tubir) lebih tinggi dibandingkan dengan di lereng terumbu.


2018 ◽  
Vol 30 (6) ◽  
pp. 3197-3203 ◽  
Author(s):  
Philipus Uli Basa Hutabarat ◽  
Xuan Hoa Nguyen ◽  
Shoichiro Suda

2017 ◽  
pp. fix005 ◽  
Author(s):  
Chinmayee D. Bhedi ◽  
Carson W. Prevatte ◽  
Maggie S. Lookadoo ◽  
Patricia A. Waikel ◽  
Patrick M. Gillevet ◽  
...  

2010 ◽  
Vol 13 (4) ◽  
pp. 900-910 ◽  
Author(s):  
Dina Stanić ◽  
Stuart Oehrle ◽  
Miroslav Gantar ◽  
Laurie L. Richardson

2016 ◽  
Vol 18 (3) ◽  
pp. 752-765 ◽  
Author(s):  
Yui Sato ◽  
Michael Civiello ◽  
Sara C. Bell ◽  
Bette L. Willis ◽  
David G. Bourne

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