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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis OSEANA
Tri Aryono Hadi
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Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Environmental Science Library & Information Science Other

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THE CONDITION AND DISTRIBUTION OF STONY CORALS (Scleractinia corals) IN BANGKA WATER Rikoh Manogar Siringoringo; Tri Aryono Hadi
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 2 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.754 KB) | DOI: 10.29244/jitkt.v5i2.7557

Abstract

Bangka water is well known as the best tin producer in which there are many off-shore tin-mining activities conducted by both local people and tin companies. Such condition apparently brings negative impacts to marine life. Stony corals are considered as the major component of coral reef ecosystems whose condition is influenced by environmental condition. The aim of this study is to observe the general condition of coral reefs and the distribution of stony corals in Bangka Water. The study was carried out between September and November 2010 by taking 10 stations. The method used was LIT as long as 70 meters installed parallel to the coast line. The result indicates that generally the condition of coral reef was categorized as fair condition, the coral cover averaging at 47, 82 %. There were 89 species of stony corals found, divided into 13 genera. The most dominant species was Porites lutea , particularly at Station 6 by 33,3%. The prolonged turbidity mainly caused by tin-mining activities is thought to lead the coral reefs to critical condition particularly in some areas. Keywords: stony corals, coral cover, distribution, Bangka Water.
PERANAN EKOLOGIS SPONS PADA EKOSISTEM TERUMBU KARANG Tri Aryono Hadi
OSEANA Vol 43 No 1 (2018)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2018.Vol.43No.1.15

Abstract

ECOLOGICAL ROLES OF SPONGES IN CORAL REEF ECOSYSTEMS. Sponges are one of main reef benthic components which is quite abundant and worldwide distributed. Due to its unique characteristics, such as filtering water column, possessing pores throughout the body, and producing metabolite compounds, sponges play important roles in marine ecosystems. In coral reef ecosystems, the roles are very complex, including facilitating nutrient cycles, stabilizing/eroding calcareous substrates, hosting many types of marine organisms, providing protection to its symbions, competing with other marine benthos in structuring the reefs and as a bioindicator. In this case, sponges can be illustrated as a mediator between abiotic and biotic factors, thus material and energy transfers in the coral reef ecosystems can be boosted. Therefore, it is essential to monitor sponge communities in the reefs considering that its immense roles cannot likely be replaced by other marine organisms.
IMPACTS OF SEDIMENTATION ON STONY CORALS Tri Aryono Hadi
OSEANA Vol 42 No 2 (2017)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2017.Vol.42No.2.46

Abstract

PENGARUH SEDIMENTASI PADA KARANG KERAS. Aktivitas manusia baik di darat maupun di laut membawa banyak pengaruh negatif terhadap ekosistem laut. Terumbu karang yang utamanya disusun oleh karang keras mengalami degradasi akibat turunnya kualitas perairan, terutama akibat sedimentasi dan eutrofikasi. Secara umum hal ini akan menyebabkan menurunnya kelimpahan dan diversitas karang batu, dan secara khusus akan memengaruhi proses fisiologis karang. Proses fotosintesis menurun sebagai imbas dari menurunnya penetrasi cahaya akibat tingginya turbiditas dan sedimen yang menempel di permukaan karang. Untuk menanggulangi defisit energi, maka karang meningkatkan aktivitas menangkap makanan sekaligus proses respirasi. Reproduksi dan rekruitmen juga akan menurun seiring rusaknya sperma karang dan tertutupnya substrat untuk perlekatan larva. Sedimen juga akan memicu penyakit karang karena produksi mukus yang berlebihan. Pengkayaan nutrien di laut akan meningkatkan proses fotosintesis sebagaimana tersedianya senyawa anorganik yang penting untuk transfer energi dan kandungan dari zooxanthellae, namun apabila berlebihan akan menimbulkan gangguan pada proses reproduksi dan meningkatkan wabah penyakit karang. Meskipun karang mampu merespon gangguan tersebut, untuk jangka waktu yang panjang akan menimbulkan effek yang mematikan. Oleh karena itu perlu dilakukannya evaluasi mengenai aktivitas manusia disekitar wilayah pesisir untuk meminimalisir dampak negatif pada ekosistem pesisir.
Co-Authors Rikoh Manogar Siringoringo