Bacterial symbionts of acroporid corals: Antipathogenic potency against Black Band Disease

Abstract

Wijayanti DP, Sabdono A, Widyananto PA, Dirgantara D, Hidaka M. 2018. Bacterial symbionts of acroporid corals:Antipathogenic potency against Black Band Disease. Biodiversitas 19: 1236-1242. Black Band Disease (BBD), an infectious coraldisease which can cause a rapid decline of coral reefs, has appeared as a serious threat -to many reefs around the world includingKarimunjawa National Park, Java Sea. Although it had been studied for more than 30 years, control of disease remains obscure. In thepresent research coral symbiont bacteria having antipathogenic activity against Black Band bacterial associate were screened andcharacterized. Fourteen out of 87 bacteria isolates derived from healthy corals showed antagonism against the Black Band bacterialstrains. The isolates were then re-examined using disc-diffusion method to confirm the initial observation. The CI6 showed the strongestability to inhibit BAFBB5, a bacterial strain associated with the BBD. Following the partial sequencings of 16S rDNA, the resultsindicated that the CI6 isolate was closely related to Virgibacillus salarius strain SA-Vb1, while the BBD associate isolate has strongrelation with Virgibacillus marismortui. The results have shown that bacterial strains derived from healthy acroporid corals havepotential to be used as a biocontrol agent against BBD.

Potential analysis of location, socio-culture and biodiversity as ecotourism attraction in Valentine Bay on Buano Island, West Seram, Maluku, Indonesia

“…According to (Rujehan and Matius 2018), land clearing and mining activities are also issues that often occur in Bukit Soeharto, East Kalimantan. Coastal threats may consist of overfishing, and similar threats are also reported in Lake Sentani due to overfishing (Ohee et al 2018), damage to mangroves (Radabaugh et al 2019) and coral reefs (Wijayanti et al 2018), declining quality of underwater parks, the threat of various species of marine life such as trade in endangered species, increased abrasion, widespread sedimentation, and intrusion of seawater. The coastal ecosystem faces serious threats of pollution, overexploitation, conflicting use of resources, damage, and destruction of habitats (Kumar et al 2017).…”

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“…13 . Virgibacillus salaries and Virgibacillus marismortui isolated from healthy acroporid corals and can inhibit the growth of the Black Band Disease (BBD) bacterial strain 14 . Pseudo alteromonas sp.…”

Short communication: Algal genotypes in White Syndrome infected coral Acropora muricata from the Karimunjawa Islands, Indonesia

“…The park consists of 27 islands that are dominated by coral reef ecosystems, with Acropora being the most dominant genus (Edinger et al 2000). Various disease types were observed at the surveyed island around the Archipelago, namely Black Band Disease (Sabdono et al 2017;Wijayanti et al 2018), White Syndrome (Sabdono et al 2019), and White Patch (Wijayanti et al 2020). During monitoring of the coral disease, we found two different types of diseases infected the coral Acropora muricata.…”