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All Journal JOURNAL OF COASTAL DEVELOPMENT Buletin Palawija Buletin Palawija
Suharsono .
Indonesian Legume and Tuber Crops Research Institute (ILETRI) Jln. Raya Kendalpayak KM 08, PO.BOX. 66 Malang, 65101
Agriculture, Biological Sciences & Forestry Education

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Journal : journal of coastal development

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THE GROWTH INHIBITION OF MARINE BIOFILM-FORMING BACTERIA BY THE CRUDE EXTRACT OF SOFT CORAL Sinularia sp. Ocky Karna Radjasa; A. Sabdono; Suharsono .
JOURNAL OF COASTAL DEVELOPMENT Vol 2, No 2 (1999): Volume 2, Number 2, Year 1999
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Marine biofouling has been recognized as a big problem faced by marine technology, and has caused huge economic losses to marine industries. Until recently, marine biofouling has been controlled by the use of metal-based coating which has become another problem because of their negative impacts on marine environments. Soft corals have been known to produce secondary metabolites, some of which may inhibit the fouling processes. The objective of this research was to examine the antimicrobial properties of soft coral Sinularia sp against marine biofilm-forming bacteria The results showed that the soft coral tissues of Sinularia sp. had the antibacterial potency. The crude extracts of Sinularia sp affected significantly on the growth of bacteria tested. The optimal concentration of crude extracts needed to inhibit the growth of bacteria was 150 µg/ml. There were no significantly different among bacteria isolated from fiber, wood and iron steel on diameter of inhibitory zone of the bacterial growth. It is concluded thet the search of bioactive substances produced by soft corals is great possibility to find alternatives for metal-based coatings. Yet, a series of researchs must be undertaken in order to find the secondary metabolites which may be used as antifoulant.
ASSESSING ECOLOGICAL RESILIENCE OF INDONESIAN CORAL REEFS Imam Bachtiar; Ario Damar; Suharsono .; Neviaty P. Zamani
JOURNAL OF COASTAL DEVELOPMENT Vol 14, No 3 (2011): Volume 14, Number 3, Year 2011
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Ecological resilience is an important property of natural ecosystem to be understood in coral reef management. Resilience of Indonesian coral reefs was assessed using 2009 COREMAP data. The assessment used 698 data of line intercept transects collected from 15 districts and 4 marine physiographies. Resilience index used in the assessment was developed by the authors but will be published elsewhere. The results showed that coral reefs at western region had higher average resilience indices than eastern region, and Sunda Shelf reefs had higher resilience indices than coral reefs at Indian Ocean, Sulawesi-Flores, or Sahul Shelf. Four districts were found to have coral reefs with highest resilience indices, i.e. Bintan and Natuna (western region), and Wakatobi and Buton (eastern region). Raja Ampat had coral reefs with lower average resilience indices than that of Wakatobi. Uses of resilience index in coral reef management should be coupled with other information such as maximum depth of coral communities.  
Co-Authors A. Sabdono Ario Damar Imam Bachtiar Kurnia Paramita Sari NEVIATY PUTRI ZAMANI Ocky Karna Radjasa Syarifin Firdaus Utut Widyastuti Suharsono1 Suharsono